Schools
Aalto University School of Business

Biography

Aalto University School of Business
Professor, Measurement Science and Technology

Peer-reviewed scientific articles

Journal article-refereed, Original research

Predictable quantum efficient detector based on n-type silicon photodiodes

Dönsberg, Timo; Manoocheri, Farshid; Sildoja, Meelis; Juntunen, Mikko; Savin, Hele; Tuovinen, Esa; Ronkainen, Hannu; Prunnila, Mika; Merimaa, Mikko; Tang, Chi Kwong; Gran, Jarle; Mueller, Ingmar; Werner, Lutz; Rougie, Bernard; Pons, Alicia; Smid, Marek; Gal, Peter; Lolli, Lapo; Brida, Giorgio; Rastello, Maria Luisa; Ikonen, Erkki
2017 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Method for estimating effects of unknown correlations in spectral irradiance data on uncertainties of spectrally integrated colorimetric quantities

Karha, Petri; Vaskuri, Anna; Mäntynen, Henrik; Mikkonen, Nikke; Ikonen, Erkki
2017 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres

Kokka, Alexander; Pulli, Tomi; Poikonen, Tuomas; Askola, Janne; Ikonen, Erkki
2017 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Nonlinearity characterization of array spectroradiometers for the solar UV measurements

Pulli, Tomi; Nevas, Saulius; Gawhary, Omar El; Van Den Berg, Steven; Askola, Janne; Kärhä, Petri; Manoocheri, Farshid; Ikonen, Erkki
2017 in APPLIED OPTICS (OPTICAL SOC AMER)
ISSN: 1559-128X

Tutorial Road Lighting for Efficient and Safe Traffic Environments

Tetri, Eino; Bozorg Chenani, Sanaz; Räsänen, Rami-Samuli; Baumgartner, Hans; Vaaja, Matti; Sierla, Seppo; Tähkämö, Leena; Virtanen, Juho-Pekka; Kurkela, Matti; Ikonen, Erkki; Halonen, Liisa; Hyyppä, Hannu; Kosonen, Iisakki
2017 in LEUKOS (ILLUMINAT ENG SOC NORTH AMER)
ISSN: 1550-2724

Experimental demonstration of a predictable single photon source with variable photon flux

Vaigu, Aigar; Porrovecchio, Geiland; Chu, Xiao Liu; Lindner, Sarah; Smid, Marek; Manninen, Albert; Becher, Christoph; Sandoghdar, Vahid; Götzinger, Stephan; Ikonen, Erkki
2017 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Temperature invariant energy value in LED spectra

Baumgartner, Hans; Vaskuri, Anna; Kärhä, Petri; Ikonen, Erkki
2016 in APPLIED PHYSICS LETTERS (AMERICAN INSTITUTE OF PHYSICS)
ISSN: 0003-6951

Natural and accelerated ageing of LED lamps

Baumgartner, H.; Renoux, D.; Kärhä, P.; Poikonen, T.; Pulli, T.; Ikonen, E.
2016 in LIGHTING RESEARCH AND TECHNOLOGY (SAGE Publications Ltd)
ISSN: 1477-1535

Optical aperture area determination for accurate illuminance and luminous efficacy measurements of LED lamps

Dönsberg, Timo; Mäntynen, Henrik; Ikonen, Erkki
2016 in OPTICAL REVIEW (Springer-Verlag GmbH and Co. KG)
ISSN: 1340-6000

A reference material with close to Lambertian reflectance and fluorescence emission profiles

Jaanson, P.; Pulli, T.; Manoocheri, F.; Ikonen, E.
2016 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Goniometrical measurements of fluorescence quantum efficiency

Jaanson, P.; Manoocheri, F.; Ikonen, E.
2016 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)
ISSN: 0957-0233

Advantages of white LED lamps and new detector technology in photometry

Pulli, Tomi; Donsberg, Timo; Poikonen, Tuomas; Manoocheri, Farshid; Karha, Petri; Ikonen, Erkki
2015 in LIGHT: SCIENCE & APPLICATIONS (IOP PUBLISHING LTD)

Mathematical limitations of the CIE mesopic photometry system

Shpak, Maksim; Kärhä, Petri; Ikonen, Erkki
2015 in LIGHTING RESEARCH AND TECHNOLOGY (SAGE Publications Ltd)
ISSN: 1477-1535

Compact two-element transmission trap detector for 1550 nm wavelength

Vaigu, Aigar; Kübarsepp, Toomas; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki
2015 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)
ISSN: 0957-0233

High-resolution setup for measuring wavelength sensitivity of photoyellowing of translucent materials

Vaskuri, Anna; Karha, Petri; Heikkila, Anu; Ikonen, Erkki
2015 in REVIEW OF SCIENTIFIC INSTRUMENTS (AMER INST PHYSICS)
ISSN: 0034-6748

Modeling the spectral shape of InGaAlP-based red light-emitting diodes

Vaskuri, Anna; Baumgartner, Hans; Kärhä, Petri; Andor, Gyorgy; Ikonen, Erkki
2015 in JOURNAL OF APPLIED PHYSICS (AIP Publishing)
ISSN: 0021-8979

A temperature controller for high power light emitting diodes based on resistive heating and liquid cooling

Baumgartner, Hans; Vaskuri, Anna; Kärhä, Petri; Ikonen, Erkki
2014 in APPLIED THERMAL ENGINEERING (PERGAMON-ELSEVIER SCIENCE LTD)
ISSN: 1359-4311

New source and detector technology for the realization of photometric units

Dönsberg, Timo; Pulli, Tomi; Poikonen, Tuomas; Baumgartner, Hans; Vaskuri, Anna; Sildoja, Meelis; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2014 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

A primary standard of optical power based on induced-junction silicon photodiodes operated at room temperature

Dönsberg, Timo; Sildoja, Meelis; Manoocheri, Farshid; Merimaa, Mikko; Petroff, Leo; Ikonen, Erkki
2014 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Foreword, The 12th International Conference on New Developments and Applications in Optical Radiometry (NEWRAD 2014)

Ikonen, Erkki
2014 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Gonioreflectometric properties of metal surfaces

Jaanson, Priit; Manoocheri, Farshid; Mäntynen, Henrik; Gergely, Mathias; Widlowski, Jean-Luc; Ikonen, Erkki
2014 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Low-Loss Photon-to-Electron Conversion

Manoocheri, Farshid; Sildoja, Meelis; Dönsberg, Timo; Merimaa, Mikko; Ikonen, Erkki
2014 in OPTICAL REVIEW (Springer-Verlag GmbH and Co. KG)
ISSN: 1340-6000

Technical notes: A detailed study for the provision of measurement uncertainty and traceability for goniospectrometers

Peltoniemi, Jouni I.; Hakala, Teemu; Suomalainen, Juha; Honkavaara, Eija; Markelin, Lauri; Gritsevich, Maria; Eskelinen, Juho; Jaanson, Priit; Ikonen, Erkki
2014 in JOURNAL OF QUANTITATIVE SPECTROSCOPY AND RADIATIVE TRANSFER (Elsevier Limited)
ISSN: 0022-4073

Characterization of thin film thickness

Pourjamal, Sara; Mäntynen, Henrik; Jaanson, Priit; Maria Rosu, Dana; Hertwig, Andreas; Manoocheri, Farshid; Ikonen, Erkki
2014 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Metrology for industrial quantum communications: the MIQC project

Rastello, Maria L.; Degiovanni, Ivo P.; Sinclair, Alistar G.; Kück, Stefan; Chunnilall, Christopher J.; Porrovecchio, Geiland; Smid, Marek; Manoocheri, Farshid; Ikonen, Erkki; Kubarsepp, Toomas; Stucki, D.; Hong, K.S.; Kim, S.K.; Tosi, A.; Brida, G.; Meda, A.; Piacentini, F.; Traina, P.; Natsheh, A.Al.; Cheung, Jessica Y.; Müller, Ingmar; Klein, R.; Vaigu, Aigar
2014 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Luminance meter for photopic and scotopic measurements in the mesopic range

Shpak, Maksim; Kärhä, Petri; Porrovecchio, Geiland; Smid, Marek; Ikonen, Erkki
2014 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)
ISSN: 0957-0233

Use of the predictable quantum efficient detector with light sources of uncontrolled state of polarization

Sildoja, Meelis; Dönsberg, Timo; Mäntynen, Henrik; Merimaa, Mikko; Manoocheri, Farshid; Ikonen, Erkki
2014 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)
ISSN: 0957-0233

Spectrally adjustable quasi-monochromatic radiance source based on LEDs and its application for measuring spectral responsivity of a luminance meter

Hirvonen, Juha-Matti; Poikonen, Tuomas; Vaskuri, Anna; Karha, Petri; Ikonen, Erkki
2013 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)
ISSN: 0957-0233

Predictable quantum efficient detector: II.Characterization and confirmed responsivity

Mueller, Ingmar; Johannsen, Uwe; Linke, Ulrike; Socaciu-Siebert, Liana; Smid, Marek; Porrovecchio, Geiland; Sildoja, Meelis; Manoocheri, Farshid; Ikonen, Erkki; Gran, Jarle; Kuebarsepp, Toomas; Brida, Giorgio; Werner, Lutz
2013 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

A method for optimizing the cosine response of solar UV diffusers

Pulli, Tomi; Kärhä, Petri; Ikonen, Erkki
2013 in JOURNAL OF GEOPHYSICAL RESEARCH (AMER GEOPHYSICAL UNION)
ISSN: 0148-0227

Predictable quantum efficient detector: I.Photodiodes and predicted responsivity

Sildoja, Meelis; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki; Mueller, Ingmar; Werner, Lutz; Gran, Jarle; Kuebarsepp, Toomas; Smid, Marek; Rastello, Maria Luisa
2013 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Simulations of a predictable quantum efficient detector with PC1D

Gran, Jarle; Kuebarsepp, Toomas; Sildoja, Meelis; Manoocheri, Farshid; Ikonen, Erkki; Mueller, Ingmar
2012 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

The 11th International Conference on New Developments and Applications in Optical Radiometry (NEWRAD 2011) FOREWORD

Ikonen, Erkki
2012 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Double-coiled tungsten filament lamps as absolute spectral irradiance reference sources

Ojanen, Maija; Karha, Petri; Nevas, Saulius; Sperling, Armin; Mantynen, Henrik; Ikonen, Erkki
2012 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Uncertainty analysis of photometer directional response index f2 using Monte Carlo simulation

Poikonen, Tuomas; Blattner, Peter; Kärhä, Petri; Ikonen, Erkki
2012 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Luminous efficacy measurement of solid-state lamps

Poikonen, Tuomas; Pulli, Tomi; Vaskuri, Anna; Baumgartner, Hans; Karha, Petri; Ikonen, Erkki
2012 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Three-Pion Correlations for Studying Partial Coherence in Nuclear Collisions

Ikonen, Erkki
2011 in PHYSICS OF PARTICLES AND NUCLEI LETTERS (Maik Nauka-Interperiodica Publishing)
ISSN: 1547-4771

Performance of a Multi-Wavelength Filter Radiometer for Spectral Irradiance Measurement in the Near IR

Liu, Yuanjie; Xu, Gan; Huang, Xuebo; Manoocheri, Farshid; Ikonen, Erkki
2011 in LIGHT AND ENGINEERING (ZNACK PUBLISHING HOUSE)
ISSN: 0236-2945

Coherence of Radiation as Studied by Multiple Coincidences of Photons and Particles

Ikonen, Erkki
2010 in OPTICAL REVIEW (Springer-Verlag GmbH and Co. KG)
ISSN: 1340-6000

Quantum Interference of Tunably Indistinguishable Photons from Remote Organic Molecules

Lettow, R.; Rezus, Y.L.A.; Renn, A.; Zumofen, G.; Ikonen, E.; Götzinger, S.; Sandoghdar, V.
2010 in PHYSICAL REVIEW LETTERS (AMERICAN PHYSICAL SOC)
ISSN: 0031-9007

Comparison of the radiation temperature scales between MIKES and PTB

Ojanen, Maija; Anhalt, K.; Hartmann, J; Schiller, S.; Weckström, T.; Kärhä, Petri; Heinonen, M.; Ikonen, Erkki
2010 in MEASUREMENT (Elsevier)
ISSN: 0263-2241

Spectral irradiance model for tungsten halogen lamps in 340-850 nm wavelength range

Ojanen, Maija; Kärhä, Petri; Ikonen, Erkki
2010 in APPLIED OPTICS (OPTICAL SOC AMER)
ISSN: 1559-128X

Multifunctional integrating sphere setup for luminous flux measurements of light emitting diodes

Poikonen, Tuomas; Manninen, Pasi; Kärhä, Petri; Ikonen, Erkki
2010 in REVIEW OF SCIENTIFIC INSTRUMENTS (AMER INST PHYSICS)
ISSN: 0034-6748

Optical Temperature Measurements of Silicon Microbridge Emitters

Shpak, Maksim; Sainiemi, Lauri; Ojanen, Maija; Kärhä, Petri; Heinonen, Martti; Franssila, Sami; Ikonen, Erkki
2010 in APPLIED OPTICS (OPTICAL SOC AMER)
ISSN: 1559-128X

Temperature measurements of a glowing microbridge

Shpak, Maksim; Sainiemi, Lauri; Ojanen, Maija; Kärhä, Petri; Heinonen, Martti; Franssila, Sami; Ikonen, Erkki
2010 in APPLIED OPTICS (OPTICAL SOC AMER)
ISSN: 1559-128X

Optical Temperature Measurement Method for Glowing Microcomponents

Shpak, Maksim; Kärhä, P.; Ojanen, M.; Ikonen, E; Heinonen, M.
2010 in INTERNATIONAL JOURNAL OF THERMOPHYSICS (Springer New York)
ISSN: 0195-928X

Molecules as sources for indistinguishable single photons

Ahtee, V.; Lettow, R.; Pfab, R.; Renn, A.; Ikonen, E.; Götzinger, S.; Sandoghdar, V.
2009 in JOURNAL OF MODERN OPTICS (TAYLOR & FRANCIS LTD)
ISSN: 0950-0340

Measurement of Erbium-doped fiber nonlinearity using continuous-wave self-phase modulation method

Hieta, Tuomas; Ikonen, Erkki
2009 in Technology IEEE/OSA Journal of Lightwave (TAYLOR & FRANCIS LTD)

External-cavity lasers based on a volume holographic grating at normal incidence for spectroscopy in the visible range

Hieta, Tuomas; Vainio, M.; Moser, C.; Ikonen, Erkki
2009 in OPTICS COMMUNICATIONS (Elsevier)

Comparison measurements of 0:45 radiance factor and goniometrically determined diffuse reflectance

Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki; Hauer, K.-O; Höpe, A.
2009 in APPLIED OPTICS (OPTICAL SOC AMER)

Non-Lambertian behaviour of fluorescence emission from solid amorphous material

Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki
2009 in METROLOGIA (IOP PUBLISHING LTD)

Spectral irradiance comparison using a multi-wavelength filter radiometer

Liu, Y.J.; Xu, G.; Ojanen, Maija; Ikonen, Erkki
2009 in METROLOGIA (IOP PUBLISHING LTD)

Estimation of the optical receiving plane positions of solar spectroradiometers with spherical diffusers on the basis of spatial responsivity data

Manninen, Pasi; Koskela, Tapani; Ylianttila, Lasse; Kärhä, Petri; Ikonen, Erkki
2009 in OPTICS LETTERS (OPTICAL SOC AMER)
ISSN: 0146-9592

Report of the Spectral Irradiance Comparison EURAMET.PR-K1.a.1 between MIKES (Finland) and NIMT (Thailand)

Ojanen, Maija; Shpak, Maksim; Kärhä, Petri; Leecharoen, R.; Ikonen, Erkki
2009 in METROLOGIA (IOP PUBLISHING LTD)

Uncertainty evaluation for linking a bilateral comparison with the corresponding CIPM key comparison

Ojanen, Maija; Shpak, M.; Kärhä, Petri; Leecharoen, R.; Ikonen, Erkki
2009 in METROLOGIA (IOP PUBLISHING LTD)

Uncertainty analysis of photometer quality factor f1'

Poikonen, Tuomas; Kärhä, Petri; Manninen, Pasi; Manoocheri, Farshid; Ikonen, Erkki
2009 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Reflectance calculations for predictable quantum efficient detector Metrologia

Sildoja, Meelis; Manoocheri, F.; Ikonen, E.
2009 in METROLOGIA (IOP PUBLISHING LTD)

Goniofluorometer for characterization of fluorescent materials

Holopainen, Silja; Manoocheri, F.; Ikonen, Erkki
2008 in APPLIED OPTICS (OPTICAL SOC AMER)

Chaoticity parameter lambda and multiple coherent components in relativistic heavy-ion collisions

Ikonen, E.
2008 in PHYSICAL REVIEW C (American Physical Society)
ISSN: 0556-2813

Determining the irradiance signal from an asymmetric source with directional detectors: Application to calibrations of radiometers with diffusers

Manninen, P.; Kärha, P.; Ikonen, E.
2008 in APPLIED OPTICS (OPTICAL SOC AMER)

Filter radiometers as a tool for quality assurance of temperature measurements with linear pyrometers

Ojanen, M.; Ahtee, V.; Noorma, M.; Weckstrom, T.; Karha, P.; Ikonen, E.
2008 in INTERNATIONAL JOURNAL OF THERMOPHYSICS (Springer New York)
ISSN: 0195-928X

Reducing photodiode reflectance by Brewster-angle operation

Sildoja, M.; Manoocheri, F.; Ikonen, E.
2008 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Comparison of absolute spectral irradiance responsivity measurement techniques using wavelength-tunable lasers

Ahtee, Ville; Brown, Steven W.; Larason, Thomas C.; Lykke, Keith R.; Ikonen, Erkki; Noorma, Mart
2007 in APPLIED OPTICS (OPTICAL SOC AMER)

Measurement of Aperture Areas Using an Optical Coordinate Measuring Machine

Hemming, Björn; Noorma, Mart; Ikonen, Erkki
2007 in INTERNATIONAL JOURNAL OF OPTOMECHATRONICS (Taylor and Francis Ltd.)

Effect of light scattering from source optics in goniometric diffuse reflectance measurements

Holopainen, Silja; Manoocheri, Farshid; Nevas, Saulius; Ikonen, Erkki
2007 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Modeling Distance Dependence of LED Illuminance

Ikonen, Erkki; Manninen, Pasi; Kärhä, Petri
2007 in Light & Engineering (IOP PUBLISHING LTD)

Triple Coincidences of X-Ray Photons

Ikonen, Erkki; Holopainen, Silja
2007 in PHYSICAL REVIEW A (AMER PHYSICAL SOC)

Reliable determination of optical fiber nonlinearity using dispersion simulations and improved power measurements

Lamminpaa, Antti; Hieta, Tuomas; Envall, Jouni; Ikonen, Erkki
2007 in JOURNAL OF LIGHTWAVE TECHNOLOGY (Institute of Electrical and Electronics Engineers Inc.)
ISSN: 0733-8724

Realization of Two Fourier-Limited Solid-State Single-Photon Sources

Lettow, R.; Ahtee, Ville; Pfab, R.; Renn, A.; Ikonen, Erkki; Götzinger, S.; Sandhogar, V.
2007 in Optical Express (Institute of Electrical and Electronics Engineers Inc.)

Final report on the CCPR-S2 suplementary comparison of area measurements of apertures for radiometry

Litorja, M.; Fowler, J.; Hartmann, J.; Fox, N.; Stock, M.; Razet, A.; Khlevnoy, B.; Ikonen, Erkki; Machacs, M.; Doytchinov, K.
2007 in METROLOGIA (IOP PUBLISHING LTD)

Method for analysing luminous intensity of light-emitting diodes

Manninen, Pasi; Hovila, Jari; Kärhä, Petri; Ikonen, Erkki
2007 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)

Investigation of comparison methods for UVA irradiance responsivity calibration facilities

Envall, Jouni; Ylianttila, Lasse; Moseley, Harry; Coleman, Andrew; Durak, M.; Kärhä, Petri; Ikonen, Erkki
2006 in METROLOGIA (IOP PUBLISHING LTD)

Calibration of broadband ultraviolet detectors by measurement of spectral irradiance responsivity

Envall, Jouni; Kärhä, Petri; Ikonen, Erkki
2006 in REVIEW OF SCIENTIFIC INSTRUMENTS (AMER INST PHYSICS)

Excess coincidences of reflected and refracted x rays from a synchrotron-radiation beamline

Ikonen, Erkki; Yabashi, M.; Ishikawa, T.
2006 in PHYSICAL REVIEW A (AMER PHYSICAL SOC)

Characterization of germanium photodiodes and trap detector

Lamminpää, Antti; Noorma, Mart; Hyyppä, Tuomas; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2006 in Measurements Science Technology (AMER PHYSICAL SOC)

Characterization of thin films based on reflectance and transmittance measurements at oblique angles of incidence

Lamminpää, Antti; Nevas, Saulius; Manoocheri, Farshid; Ikonen, Erkki
2006 in APPLIED OPTICS (OPTICAL SOC AMER)

Determination of distance offsets of diffusers for accurate radiometric measurements

Manninen, Pasi; Hovila, Jari; Seppälä, Lauri; Kärhä, Petri; Ylianttila, Lasse; Ikonen, Erkki
2006 in METROLOGIA (IOP PUBLISHING LTD)

Determination of the diffuser reference plane for accurate illuminance responsivity calibrations

Hovila, Jari; Mustonen, Maria; Kärhä, Petri; Ikonen, Erkki
2005 in APPLIED OPTICS (OPTICAL SOC AMER)

Effects of dispersion on nonlinearity measurement of optical fibers

Lamminpää, Antti; Niemi, Tapio; Ikonen, Erkki; Marttila, Pauli; Ludvigsen, Hanne
2005 in Optical Fiber Technology (Academic Press Inc.)

Characterization of GaAsP trap detector for radiometric measurements in ultraviolet wavelength

Noorma, Mart; Kärhä, Petri; Lamminpää, Antti; Nevas, Saulius; Ikonen, Erkki
2005 in REVIEW OF SCIENTIFIC INSTRUMENTS (AMER INST PHYSICS)

Iodine spectrometer based on a 633-nm transmission-grating diode laser

Vainio, Markku; Merimaa, Mikko; Ikonen, Erkki
2005 in Measurement Science Technology (AMER INST PHYSICS)

Measurements of fibre optic power using photodiodes with and without an integrating sphere

Envall, Jouni; Kärhä, Petri; Ikonen, Erkki
2004 in METROLOGIA (IOP PUBLISHING LTD)

Evaluation of calibration methods of a photometer measuring maritime light-emitting diode buoy lanterns

Hovila, J.; Kärhä, P.; Mansner, L.; Ikonen, E.
2004 in OPTICAL ENGINEERING (SPIE)

Realization of the unit of luminous flux at the HUT using the absolute integrating-sphere method

Hovila, Jari; Toivanen, P.; Ikonen, Erkki
2004 in METROLOGIA (IOP PUBLISHING LTD)

Final Report of CCPR-K3.b.2-2004: Bilateral Comparison of Illuminance Responsivity Scales between the KRISS (Korea) and the HUT (Finland)

Ikonen, Erkki; Hovila, Jari
2004 in METROLOGIA (IOP PUBLISHING LTD)

Excess Coincidences of Spontaneous and Stimulated X Rays

Ikonen, Erkki
2004 in JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B: OPTICAL PHYSICS (OPTICAL SOC AMER)

Effect of correlations in fitting spectral irradiance data

Nevas, Saulius; Ikonen, Erkki; Kärhä, Petri; Kübarsepp, T.
2004 in METROLOGIA (IOP PUBLISHING LTD)

Gonioreflectometer for measuring spectral diffuse reflectance

Nevas, Saulius; Manoocheri, Farshid; Ikonen, Erkki
2004 in APPLIED OPTICS (OPTICAL SOC AMER)

A portable field calibrator for solar ultraviolet measurements

Kärhä, P.; Ylianttila, L.; Koskela, T.; Jokela, K.; Ikonen, E.
2003 in METROLOGIA (IOP PUBLISHING LTD)

All-optical atomic clock based on coherent population trapping in 85 RB

Merimaa, M.; Lindvall, T.; Tittonen, I.; Ikonen, E.
2003 in JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B: OPTICAL PHYSICS (OPTICAL SOC AMER)
ISSN: 0740-3224

Optical metrology of thin films using high-accuracy spectrophotometric measurements with oblique angles of incidence

Nevas, S.; Manoocheri, F.; Ikonen, E.; Tikhonravov, A.; Kokarev, M.; Trubetskov, M.
2003 in Proceedings of SPIE, Advances in Optical Thin Films (OPTICAL SOC AMER)

Determination of thin-film parameters from high accuracy measurements of spectral regular transmittance

Nevas, S.; Manoocheri, F.; Ikonen, E.
2003 in METROLOGIA (IOP PUBLISHING LTD)

Characterisation of filter radiometers with wavelength-tunable laser source

Noorma, M.; Toivanen, P.; Manoocheri, F.; Ikonen, E.
2003 in METROLOGIA (IOP PUBLISHING LTD)

Miniaturized transmission grating diode laser at 1.55 µm with a 120 nm tuning range

Vainio, M.; Merimaa, M.; Sidorin, Y.; Kuittinen, M.; Ikonen, E.
2003 in IEEE PHOTONICS TECHNOLOGY LETTERS (Institute of Electrical and Electronics Engineers Inc.)

Precision spectrometer for measurement of specular reflectance

Haapalinna, Atte; Nevas, Saulius; Manoocheri, Farshid; Ikonen, Erkki
2002 in REVIEW OF SCIENTIFIC INSTRUMENTS (AMER INST PHYSICS)

International comparison of the illuminance responsivity scales and units of luminous flux maintained at the HUT (Finland) and the NIST (USA)

Hovila, Jari; Toivanen, Pasi; Ikonen, Erkki; Ohno, Yoshi
2002 in METROLOGIA (IOP PUBLISHING LTD)

Applications related to maximum intensity correlation of hard X-rays

Ikonen, Erkki
2002 in PHYSICAL REVIEW A (AMER PHYSICAL SOC)

Comparison of spectral irradiance scales between the NIST and the HUT

Kärhä, Petri; Kübarsepp, Toomas; Yoon, Howard; Nevas, Saulius; Ikonen, Erkki
2002 in METROLOGIA (IOP PUBLISHING LTD)

A portable laser frequency at 633 nm with a compact external-cavity diode laser

Merimaa, Mikko; Kokkonen, Pauli; Nyholm, Kaj; Ikonen, Erkki
2001 in METROLOGIA (IOP PUBLISHING LTD)

Intercomparison of lamp and detector-based UV-irradiance scales for solar UV radiometer

Jokela, K.; Ylianttila, L.; Visuri, R.; Kärhä, P.; Ikonen, E.
2000 in JOURNAL OF GEOPHYSICAL RESEARCH (AMER GEOPHYSICAL UNION)

Interpolation of the spectral responsivity of silicon photodetectors in the near ultraviolet

Kubarsepp, T.; Kärhä, P.; Ikonen, E.
2000 in APPLIED OPTICS (OPTICAL SOC AMER)

Spectral irradiance measurements of tungsten lamps with filter radiometers in the spectral range 290 nm to 900 nm

Kubarsepp, T.; Kärhä, P.; Manoocheri, F.; Nevas, S.; Ylianttila, L.; Ikonen, E.
2000 in METROLOGIA (IOP PUBLISHING LTD)

Portable detector-based primary scale of spectral irradiance

Kärhä, P.; Kubarsepp, T.; Manoocheri, F.; Toivanen, P.; Ikonen, E.; Visuri, R.; Ylianttila, L.; Jokela, K.
2000 in JOURNAL OF GEOPHYSICAL RESEARCH (AMER GEOPHYSICAL UNION)

Realization of the luminous flux unit using a LED scanner for the absolute integrating sphere method

Lahti, K.; Hovila, J.; Toivanen, P.; Vahala, E.; Tittonen, I.; Ikonen, E.
2000 in METROLOGIA (IOP PUBLISHING LTD)

Compact external-cavity diode laser at 633 nm with a transmission grating

Merimaa, M.; Talvitie, H.; Laakkonen, P.; Kuittinen, M.; Tittonen, I.; Ikonen, E.
2000 in Trends in Optics and Photonics Series (TOPS) (IOP PUBLISHING LTD)

Compact external-cavity diode laser with a novel transmission geometry

Merimaa, M.; Talvitie, H.; Laakkonen, P.; Kuittinen, M.; Tittonen, I.; Ikonen, E.
2000 in OPTICS COMMUNICATIONS (Elsevier)

Detector-stabilized FEL lamps as transfer standards in an international comparison of spectral irradiance

Stock, K.D.; Raatz, K.-H.; Sperfeld, P.; Metzdorf, J.; Kubarsepp, T.; Kärhä, P.; Ikonen, E.; Liedquist, L.
2000 in METROLOGIA (IOP PUBLISHING LTD)

Realizations of the units of luminance and spectral radiance at HUT

Toivanen, P.; Hovila, J.; Kärhä, P.; Ikonen, E.
2000 in METROLOGIA (IOP PUBLISHING LTD)

Realization of the unit of luminous intensity at HUT

Toivanen, P.; Kärhä, P.; Manoocheri, F.; Ikonen, E.
2000 in METROLOGIA (IOP PUBLISHING LTD)

An intercomparison of luminous intensity scales between NPL and HUT

Goodmann, T.M.; Toivanen, P.; Nyberg, H.; Ikonen, E.
1999 in METROLOGIA (IOP PUBLISHING LTD)

Measurement of the absolute linearity of photodetectors with a diode laser

Haapalinna, A.; Kubarsepp, T.; Kärhä, P.; Ikonen, E.
1999 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)

High-accuracy measurement of specular spectral reflectance and transmittance

Haapalinna, A.; Manoocheri, F.; Ikonen, E.
1999 in ANALYTICA CHIMICA ACTA (Elsevier)

Characterisation of optical detectors using high-accuracy instruments

Manoochehri, F.; Kärhä, P.; Palva, L.; Toivanen, P.; Haapalinna, A.; Ikonen, E.
1999 in ANALYTICA CHIMICA ACTA (Elsevier)
ISSN: 0003-2670

Characterization of optical detectors using high-accuracy instruments

Manoocheri, F.; Kärhä, P.; Palva, L.; Toivanen, P.; Haapalinna, A.; Ikonen, E.
1999 in ANALYTICA CHIMICA ACTA (Elsevier)

Characterization of a multipoint measuring system of photosynthetically active radiation

Manoocheri, F.; Palva, L.; Garam, E.; Ikonen, E.
1999 in INSTRUMENTATION SCIENCE AND TECHNOLOGY (Taylor and Francis Ltd.)

Iodine-stabilized diode laser at 633 nm: Effects of optical feedback

Merimaa, M.; Talvitie, H.; Hu, J.; Ikonen, E.
1999 in IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT (Institute of Electrical and Electronics Engineers Inc.)

Characterization of a multipoint measuring system for photosynthetically active radiation

Monoochehri, F.; Palva, L.; Garam, E.; Ikonen, Erkki
1999 in INSTRUMENTATION SCIENCE AND TECHNOLOGY (Taylor and Francis Ltd.)
ISSN: 1073-9149

Method for characterization of filter radiometers

Toivanen, P.; Manoocheri, F.; Kärhä, P.; Ikonen, E.; Lassila, A.
1999 in APPLIED OPTICS (OPTICAL SOC AMER)

A digital control system for the iodine stabilized He-Ne laser

Ahola, T.; Hu, J.; Ikonen, E.
1998 in REVIEW OF SCIENTIFIC INSTRUMENTS (AMER INST PHYSICS)
ISSN: 0034-6748

Spectral reflectance of silicon photodiodes

Haapalinna, A.; Kärhä, P.; Ikonen, E.
1998 in APPLIED OPTICS (OPTICAL SOC AMER)

A new optical method for high-accuracy determination of aperture area

Ikonen, E; .Toivanen, P.; Lassila, A.
1998 in METROLOGIA (IOP PUBLISHING LTD)

Nonlinearity measurements of silicon photodetectors

Kubarsepp, T.; Haapalinna, A.; Kärhä, P.; Ikonen, E.
1998 in APPLIED OPTICS (OPTICAL SOC AMER)

Filter radiometry based on direct utilization of trap detectors

Kärhä, P.; Toivanen, P.; Haapalinna, A.; Manoocheri, F.; Ikonen, E.
1998 in METROLOGIA (IOP PUBLISHING LTD)

Investigation of trapped rubidium atoms through frequency-modulation-induced coherent transient effects

Pietiläinen, A.; Kujala, M.; Ikonen, E.
1998 in JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B: OPTICAL PHYSICS (OPTICAL SOC AMER)
ISSN: 0740-3224

Continuous-wave light source at 317 nm based on frequency doupling of diode laser

Talvitie, H.; Seppänen, A.; Äijälä, A.; Ikonen, E.
1998 in Applied Physics B (OPTICAL SOC AMER)

Frequency stabilization of a diode laser to Doppler-free spectrum of molecular iodine at 633 nm

Talvitie, H.; Merimaa, M.; Ikonen, E.
1998 in OPTICS COMMUNICATIONS (Elsevier)

Frequency shift of iodine stabilized He-Ne laser at higher harmonic order stabilization

Hu, J.; Ahola, T.; Ikonen, E.; Riski, K.
1997 in IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT (Institute of Electrical and Electronics Engineers Inc.)

Optical science and engineering in Finland, Part II

Ikonen, E.
1997 in O plus E (Institute of Electrical and Electronics Engineers Inc.)

Characterization of a polarization independent transmission trap detector

Kubarsepp, T.; Kärhä, P.; Ikonen, E.
1997 in APPLIED OPTICS (OPTICAL SOC AMER)

Development of a detector-based absolute spectral irradiance scale in the 380-900 nm spectral range

Kärhä, P.; Toivanen, P.; Manoocheri, F.; Ikonen, E.
1997 in APPLIED OPTICS (OPTICAL SOC AMER)

Intercomparison of cryogenic radiometers using silicon trap detectors

Lassila, A.; Hofer, H.; Ikonen, E.; Liedquist, L.; Stock, K.D.; Varpula, T.
1997 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)

An optical method for direct determination of the radiometric aperture area at high accuracy

Lassila, A.; Toivanen, P.; Ikonen, E.
1997 in MEASUREMENT SCIENCE AND TECHNOLOGY (IOP PUBLISHING LTD)

Observation of coherent transient effects in a magneto-optical trap

Pietiläinen, A.; Ludvigsen, H.; Talvitie, H.; Ikonen, E.
1997 in Quantum Semiclass (IOP PUBLISHING LTD)

International comparison of He-Ne lasers stabilized with [127]I_2 at lambda=633 nm, Part II: Second comparison of Northern European lasers at lambda=633 nm

Ståhlberg, B.; Ikonen, E.; Haldin, J.; Hu, J.; Ahola, T.; Riski, K.; Pendrill, L.; Kärn, U.; Hennigsen, J.; Simonsen, H.; Chartier, A.; Chartier, J.-M.
1997 in METROLOGIA (IOP PUBLISHING LTD)

Passive frequency and intensity stabilization of extended-cavity diode lasers

Talvitie, H.; Pietiläinen, A.; Ludvigsen, H.; Ikonen, E.
1997 in REVIEW OF SCIENTIFIC INSTRUMENTS (AMER INST PHYSICS)
ISSN: 0034-6748

Comparison of length standards between CMA and VNIIM

Abramova, L.; Baratov, V.; Fedorin, V.; Khavinson, L.; Latigneva, E.; Riski, K.; Ikonen, E.; Lassila, A.
1996 in METROLOGIA (IOP PUBLISHING LTD)

Experimental investigation of the power shift of iodine-stabilized He-Ne lasers at 633 nm

Hu, J.; Ikonen, E.; Riski, K.
1996 in METROLOGIA (IOP PUBLISHING LTD)

Optical Science and Engineering in Finland, Part I

Ikonen, E.
1996 in O plus E (IOP PUBLISHING LTD)

Detector-Based Calibration Method for High-Accuracy Solar UV Measurements

Kärhä, P.; Visuri, R.; Leszczynski, K.; Manoocheri, F.; Jokela, K.; Ikonen, E.
1996 in PHOTOCHEMISTRY AND PHOTOBIOLOGY (Wiley-Blackwell)

Comparison measurements on regular spectral transmittance

Manoocheri, F.; Ikonen, E.; Liedquist, L.
1996 in COLOR RESEARCH AND APPLICATION (John Wiley and Sons Inc.)

Coherent transient effects of laser-cooled and trapped atoms

Pietiläinen, A.; Ludvigsen, H.; Talvitie, H.; Ikonen, E.
1996 in OSA Trends in Optics and Photonics Series (John Wiley and Sons Inc.)

Improved frequency stability of an external cavity diode laser by eliminating temperature and pressure effects

Talvitie, H.; Åman, J.; Ludvigsen, H.; Pietiläinen, A.; Pendrill, L.; Ikonen, E.
1996 in APPLIED OPTICS (OPTICAL SOC AMER)

On the Nth harmonic locking of the iodine stabilized He-Ne laser

Hu, J.; Ikonen, E.; Riski, K.
1995 in OPTICS COMMUNICATIONS (Elsevier)

Frequency Shift of Iodine Absorption Components Caused by a Small Amount of 127I129I

Hu, J.; Ikonen, E.; Riski, K.
1995 in METROLOGIA (IOP PUBLISHING LTD)

Development of iodine stabilized He-Ne lasers at MRI

Hu, J.; Ahola, T.; Riski, K.; Ikonen, E.
1995 in MEASUREMENT (Elsevier)

Radiometric Realization of the Candela with a Trap Detector

Ikonen, E.; Kärhä, P.; Lassila, A.; Manoocheri, F.; Fagerlund, H.; Liedquist, L.
1995 in METROLOGIA (IOP PUBLISHING LTD)

Intercomparison of luminous intensity scales based on trap detectors and based on incandescent lamps

Ikonen, E.; Liedquist, L.; Kärhä, P.; Fagerlund, H.
1995 in METROLOGIA (IOP PUBLISHING LTD)

Optical power and transmittance measurements and their use in detector-based realization of the luminous intensity scale

Kärhä, P.; Lassila, A.; Ludvigsen, H.; Manoocheri, F.; Fagerlund, H.; Ikonen, E.
1995 in OPTICAL ENGINEERING (SPIE)

Interferometers for calibration of length standards

Lassila, A.; Ikonen, E.; Riski, K.
1995 in OPTICAL ENGINEERING (SPIE)

High-accuracy spectrometer for measurement of regular spectral transmittance

Manoocheri, F.; Ikonen, E.
1995 in APPLIED OPTICS (OPTICAL SOC AMER)

Experiments with laser-cooled rubidium atoms

Pietiläinen, A.; Ludvigsen, H.; Talvitie, H.; Ikonen, E.
1995 in OPTICAL ENGINEERING (SPIE)

Correlated gamma rays in synchrotron radiation

Ikonen, Erkki; Rüffer, R.
1994 in Hyperfine Interactions (SPRINGER)

Interferometer for calibration of graduated line scales with a moving CCD camera as a line detector

Lassila, A.; Ikonen, E.; Riski, K.
1994 in APPLIED OPTICS (OPTICAL SOC AMER)

Laser Cooling of Rubidium Atoms in Vapor Cell

Ludvigsen, H.; Äijälä, A.; Pietiläinen, A.; Talvitie, H.; Ikonen, E.
1994 in PHYSICA SCRIPTA (IOP Publishing Ltd.)

Russian-Finnish Comparison of the Frequencies of Iodine-stabilized He-Ne Lasers at 633 nm

Vitushkin, L.F.; Zakharenko, Yu.G.; Melnikov, N.A.; Hu, J.; Ikonen, E.; Riski, K.
1994 in METROLOGIA (IOP PUBLISHING LTD)

Gauge-block Interferometer based on one Stabilized Laser and a White-light Source

Ikonen, E.; Riski, K.
1993 in METROLOGIA (IOP PUBLISHING LTD)

Heterodyne Frequency Measurements of a Voltage-Controlled Diode Laser

Ludvigsen, Hanne; Holmlund, C.; Ikonen, E.
1993 in IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT (Institute of Electrical and Electronics Engineers Inc.)

Dynamics of 119SnCl4 Liquid Molecules in Porous Glass

Hietaniemi, J.; Ikonen, E.; Katila, T.
1992 in Europhys. Lett. (Institute of Electrical and Electronics Engineers Inc.)

Mössbauer Effect in Confined Liquid Molecules

Hietaniemi, J.; Katila, T.; Linden, J.; Tittonen, I.; Ikonen, E.
1992 in PHYSICAL REVIEW B (AMER PHYSICAL SOC)

Dynamics of [119]SnCl_4 Liquid Molecules in Porous Glass

Hietaniemi, J.; Ikonen, E.; Katila, T.
1992 in Europhysics Letters (AMER PHYSICAL SOC)

Interference Effects between Independent Gamma Rays

Ikonen, E.
1992 in PHYSICAL REVIEW LETTERS (AMERICAN PHYSICAL SOC)

Studies on Europium-based High-Tc Superconductors

Linden, J.; Hietaniemi, J.; Ikonen, E.; Lippmaa, M.; Tittonen, I.; Katila, T.; Karlomo, T.; Karppinen, M.; Niinistö, L.; Ullakko, K.
1992 in PHYSICAL REVIEW B (AMER PHYSICAL SOC)

Europium-based high-temperature superconductors studied by X-ray diffraction and 151Eu Mössbauer spectroscopy

Linden, J.; Hietaniemi, J.; Ikonen, E.; Lippmaa, M.; Tittonen, I.; Katila, T.; Karlemo, T.; Karppinen, M.; Niinistö, L.; Ullakko, K.
1992 in PHYSICAL REVIEW B (AMER PHYSICAL SOC)

Studies on Europium based High-temperature Superconductors by X-ray Diffraction and 151Eu Mössbauer Spectroscopy

Linden, J.; Lippmaa, M.; Tittonen, I.; Hietaniemi, J.; Ikonen, E.; Katila, T.; Karlemo, T.; Karppinen, M.; Niinistö, L.; Ullakko, K.
1992 in PHYSICAL REVIEW B (AMER PHYSICAL SOC)

Frequency Stabilization of a GaAlAs Semiconductor Laser by Voltage Control

Ludvigsen, H.; Holmlund, C.; Ikonen, E.; Junttila, M.-L.
1992 in APPLIED OPTICS (OPTICAL SOC AMER)

Gravitational Redshift Experiments with the High-resolution Mössbauer Resonance in 67Zn

Potzel, W.; Schäfer, C.; Steiner, M.; Karzel, H.; Schiessl, W.; Peter, M.; Kalvius, G.M.; Katila, T.; Ikonen, E.; Helistö, P.; Hietaniemi, J.
1992 in Hyperfine Interactions (SPRINGER)
ISSN: 0304-3843

Observation of Mössbauer Resonance Line Splitting Caused by Rabi Oscillations

Tittonen, I.; Lippmaa, M.; Ikonen, E.; Linden, J.; Katila, T.
1992 in PHYSICAL REVIEW LETTERS (AMERICAN PHYSICAL SOC)

International Frequency Comparisons for High-Stability He-Ne/I2 Lasers with 0.633 µm Radiation Wavelength

Vitushkin, L.F.; Zakharenko, Yu.G.; Melnikov, N.A.; Ikonen, E.; Riski, K.
1992 in Optika i Spektroskopija (Optics and Spectroscopy) (AMERICAN PHYSICAL SOC)

Review article, Literature review, Systematic review

Photometry, Radiometry and "the Candela": Evolution in the Classical and Quantum World

Ikonen, Erkki; Zwinkels, Joanne C; Fox, Nigel P.; Ulm, Gerhard; Rastello, Maria Luisa
2010 in METROLOGIA (IOP PUBLISHING LTD)
ISSN: 0026-1394

Book section, Chapters in research books

Intercomparison of Iodine Stabilized He-Ne Lasers at 633 nm

Ikonen, Erkki; Hu, J.
1994

Conference proceedings

Monte Carlo analysis of uncertainty of total atmospheric ozone derived from measured spectra

Kärhä, Petri; Vaskuri, Anna; Gröbner, Julian; Egli, Luca; Ikonen, Erkki
2017 in AIP Conference Proceedings (American Institute of Physics Inc.)
ISBN: 978-0-7354-1478-5
ISSN: 0094-243X

Facility for Determining Action Spectra of UV Photodegradation

Vaskuri, Anna; Kärhä, Petri; Anu, Heikkilä,; Ikonen, Erkki
2017 in AIP Conference Proceedings (AIP Publishing)
ISBN: 978-0-7354-1478-5
ISSN: 0094-243X

Review of challenges and disadvantages of possible LED-based photometric standards

Poikonen, Tuomas; Pulli, Tomi; Dönsberg, Timo; Baumgartner, Hans; Kärhä, Petri; Ikonen, Erkki
2016
ISBN: 978-3-902842-65-7

Uncertainty evaluation of spectral integrals for LED lamps

Pulli, T.; Vaskuri, A.; Mäntynen, Henrik; Kärhä, Petri; Ikonen, E.
2016
ISBN: 9783902842657

Methods for decreasing uncertainties in LED photometry

Dönsberg, Timo; Pulli, Tomi; Sildoja, Meelis; Poikonen, Tuomas; Baumgartner, Hans; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2015
ISBN: 978-2-759818-66-2

Measurement of relative spectra of LEDs

Baumgartner, Hans; Vaskuri, Anna; Poikonen, Tuomas; Dönsberg, Timo; Pulli, Tomi; Oksanen, Johannes; Kärhä, Petri; Ikonen, Erkki
2014

Primary standard of optical power operating at room temperature

Dönsberg, Timo; Sildoja, Meelis; Manoocheri, Farshid; Merimaa, Mikko; Petroff, Leo; Ikonen, Erkki
2014 in EPJ Web of Conferences (EDP SCIENCES)
ISBN: 9781634393287
ISSN: 2100-014X

Calibration of spectral responsivity of imaging devices using led light sources

Ikonen, Erkki; Hirvonen, J-M; Poikonen, Tuomas; Vaskuri, Anna; Kärhä, Petri
2014

Selected Topics of Radiometry Research in Finland

Ikonen, Erkki
2014

Gonioreflectometric properties of metal surfaces

Jaanson, Priit; Manoocheri, Farshid; Mäntynen, Henrik; Gergely, Mathias; Widlowski, Jean-Luc; Ikonen, Erkki
2014

Natural and Accelerated Ageing of Solid State Lamps

Kärhä, Petri; Baumgartner, Hans; Vaskuri, Anna; Renoux, Dominique; Ikonen, Erkki
2014

Advantages of a two-channel luminance meter for photopic and scotopic measurements in determining mesopic luminance

Kärhä, Petri; Shpak, Maksim; Ikonen, Erkki
2014

Adjustable power line impedance emulator for characterisation of energy-saving lighting products

Poikonen, Tuomas; Koskinen, Teemu; Baumgartner, Hans; Kärhä, Petri; Ikonen, Erkki
2014
ISSN: 0000-0000

Realization of photometric units without V(?) filters and their dissemination to LED lighting applications

Poikonen, Tuomas; Pulli, Tomi; Dönsberg, Timo; Baumgartner, Hans; Vaskuri, Anna; Sildoja, Meelis; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2014
ISBN: 978-3-902842-22-0

Modular twoaxis holder for luminous efficacy measurement of OLED-panels

Poikonen, Tuomas; Santaholma, M.; Askola, Janne; Pulli, Tomi; Ikonen, Erkki
2014

Adjustable Power Line Impedance Emulator for Characterization of Energy-Saving Lamps

Poikonen, Tuomas; Koskinen, Teemu; Baumgartner, Hans; Kärhä, Petri; Ikonen, Erkki
2014

Characterization of thin films for thickness non-uniformity

Pourjamal, Sara; Mäntynen, Henrik; Jaanson, Priit; Manoocheri, Farshid; Ikonen, Erkki
2014

Realization of Improved Solar UV Diffusers

Pulli, Tomi; Kärhä, Petri; Schreder, Josef; Mes, Joop; Partosoebroto, Allard; Ikonen, Erkki
2014

Emissivity measurement of high-temperature piezoelectric ceramics

Shpak, Maksim; Heinonen, Martti; Stevenson, Tim; Hameury, Jacques; Ojanen, Maija; Ikonen, Erkki
2014

Traceability at the single photon level for quantum communication

Vaigu, Aigar; Kübarsepp, Toomas; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki
2014

Low-Loss Photon-to-Electron Conversion

Ikonen, Erkki; Manoocheri, Farshid; Sildoja, Meelis-Mait; Dönsberg, Timo; Merimaa, Mikko
2013

Predictable Quantum Efficient Detecto

Sildoja, M; Manoocheri, F; Merimaa, M; Ikonen, E; Müller, I; Werner, L; Gran, J; Kübarsepp, T; Smîd, M; Rastello, Maria Luisa
2012

Simulations of Predictable Quantum Efficient Detector with PC1D

Gran, Jarle; Kübarsepp, Toomas; Sildoja, Meelis; Manoocheri, Farshid; Ikonen, Erkki; Müller, Ingmar
2011

Tungsten Filament Lamps as Absolute Radiometric Reference Sources

Kärhä, P.; Ojanen, M.; Nevas, S.; Ikonen, E.
2011

Predictable Quantum Efficient Detector II: Characterization Results

Müller, I.; Brida, G.; Gran, J.; Hoem, S.S.; Ikonen, E.; Kübarsepp, T.; Link, U.; Manoocheri, F.; Sildoja, M.; Smîd, M.; Socaciu-Siebert, L.; Werner, L.
2011

Proceedings of NEWRAD 2011

Park, Seongchong; Ikonen, Erkki
2011

Luminous Efficacy Measurement Setup for Solid State Lamps

Poikonen, Tuomas; Pulli, Tomi; Vaskuri, Anna; Hyvönen, Tuomo; Kärhä, Petri; Ikonen, Erkki
2011

Physics of self-induced photodiodes

Samset Hoem, Stian; Gran, Jarle; Sildoja, Meelis; Manoocheri, Farshid; Ikonen, Erkki; Müller, Ingmar
2011

Refractive index of silicon with various doping levels at high temperatures

Shpak, M.; Sainiemi, L.; Kärhä, P.; Heinonen, M.; Franssila, S.; Ikonen, E.
2011

Predictable Quantum Efficient Detector I: Photodiodes and Design

Sildoja, Meelis; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki; Müller, Ingmar; Werner, Lutz; Gran, Jarle; Kübarsepp, Toomas; Smîd, Marek; Rastello, Maria Luisa
2011

Quantum interference of tunably indistinguishable photons from remote organic molecules

Rezus, Y. L A; Lettow, R.; Renn, A.; Zumofen, G.; Ikonen, E.; Götzinger, S.; Sandoghdar, V.
2010
ISBN: 9781557528896

Measurement of Erbium-doped fiber nonlinearity using continuous-wave self-phase modulation method

Hieta, Tuomas; Ikonen, Erkki
2009

Coherence of radiation as studies by multiple coincidences of photons and particles

Ikonen, Erkki
2009

Silicon photodiodes as efficient detectors of light

Ikonen, Erkki
2009

Multiple coherent components in relativistic heavy-ion collisions

Ikonen, Erkki
2009

Goniofluorometer for measuring absolute fluorescence quantum yield

Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki
2008

Determination of f1’ and its uncertainty with biased and random error models

Ikonen, Erkki; Poikonen, Tuomas; Kärhä, Petri; Manninen, Pasi; Manoocheri, Farshid
2008

Realization of two independent fourier-limited solid-state single-photon sources

Lettow, R.; Ahtee, V.; Pfab, R.; Renn, A.; Ikonen, E.; Gotzinger, S.; Sandoghdar, V.
2008

Spectral Irradiance Comparison Using a Multi-Wavelength Filter Radiometer

Ojanen, Maija; Liu, Y.J.; Xu, G.; Ikonen, Erkki
2008

Comparison of detector-based spectral irradiance scales using lasers at TKK and at NIST

Ahtee, Ville; Brown, S.W.; Larason, T.C.; Ojanen, Maija; Lykke, K.R.; Ikonen, Erkki
2007

High-accuracy determination of fiber nonlinearity using dispersion analysis and improved power measurement

Hieta, Tuomas; Lamminpää, Antti; Ikonen, Erkki
2007

Modeling distance dependence of led illuminance

Ikonen, Erkki; Manninen, Pasi; Kärhä, Petri
2007

Filter radiometers as a tool for quality assurance of temperature measurements with linear pyrometers

Ojanen, Maija; Noorma, Mart; Ahtee, Ville; Wecktröm, Tua; Kärhä, Petri; Ikonen, Erkki
2007

Towards indistinguishable photons from two independent molecules

Ahtee, Ville; Pfab, R.; Lettow, R.; Renn, A.; Ikonen, Erkki; Sandoghar, V.
2006

Goniofluorometer for spectral quantum yield measurements

Holopainen, Silja; Manoocheri, Farshid; Laurila, Marko; Ikonen, Erkki
2006

Reference plane position and angular responsivity of spectroradiometer diffusers

Ikonen, Erkki; Manninen, Pasi; Hovila, Jari; Kärhä, Petri
2006

Uncertainties in linking bilateral and regional key comparisons to the CCPR key comparison

Ikonen, Erkki; Hovila, Jari; Seung, Nam Park
2006

Distance offset and angular responsivity measurements of UV spectroradiometer diffusers

Kärhä, Petri; Hovila, Jari; Ylianttila, Lasse; Ikonen, Erkki
2006

Effects of aging and degradations on regular transmittance of interference filters

Lamminpää, Antti; Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki
2006

Effect of correlations in fitting spectral irradiance data

Nevas, Saulius; Kärhä, Petri; Ikonen, Erkki
2006

Measurement of tree diameters using image processing

Ojanen, Maija; Merimaa, Mikko; Laasasenaho, Jukka; Melkas, Tuomo; Ikonen, Erkki
2006

Investigation of Comparison methods for UVA irradiance responsivity calibration facilities

Envall, Jouni; Ylianttila, Lasse; Moseley, H.; Coleman, A.; Durak, M.; Kärhä, Petri; Ikonen, Erkki
2005

Excess coincidences of photons

Ikonen, Erkki
2005

Optical radiation measurement at MIKES and TKK

Ikonen, Erkki
2005

Determination of luminous intensity of light-emitting diodes with modified inverse-square law

Kärhä, Petri; Hovila, Jari; Seppälä, Lauri; Ikonen, Erkki
2005

Characterization of germanium detectors for applications of spectral irradiance measurements

Lamminpää, Antti; Noorma, Mart; Hyyppä, Tuomas; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2005
ISBN: 1-58464-046-4

Improved measurement setup for nonlinearity of optical fibers

Lamminpää, Antti; Envall, Jouni; Ikonen, Erkki
2005

Characterization of germanium photodiodes and trap detector for near onfrared wavelength region

Lamminpää, Antti; Noorma, Mart; Hyyppä, Tuomas; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2005

Characterization of germanium detectors for applications of spectral irradiance measurements

Lamminpää, Antti; Noorma, Mart; Hyyppä, Tuomas; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2005

Uncertainty contributions related to dispersion and power measurement in determination of fiber nonlinearity using continuous-wave self-phase modulation

Lamminpää, Antti; Niemi, Tapio; Envall, Jouni; Ludvigsen, Hanne; Marttila, P.; Ikonen, Erkki
2005

Absolute detector-based radiometric temperature scale

Noorma, Mart; Kärhä, Petri; Jankowski, Tomasz; Manoocheri, Farshid; Weckström, Tua; Uusipaikka, L.; Ikonen, Erkki
2005

External-cavity diode laser based spectrometer for absolute determination of iodine lines around 633 nm

Vainio, Markku; Merimaa, Mikko; Nyholm, Kaj; Ikonen, Erkki
2005

Ageing of Au-GaAsP Schottky photodiodes under moderate ultraviolet radiation

Ahtee, Ville; Noorma, Mart; Kärhä, Petri; Ikonen, Erkki
2004

Calibration of fiber optic power meters at high power levels

Envall, Jouni; Andersson, A.; Petersen, J.C.; Kärhä, Petri; Ikonen, Erkki
2004

Evaluation of calibration methods of a photometer measuring maritime LED buoy lanterns

Ikonen, Erkki; Hovila, Jari; Kärhä, Petri; Mansner, L.
2004

HUT Primary scale of spectral irradiance

Kärhä, Petri; Nevas, Saulius; Noorma, Mart; Ikonen, Erkki
2004

Nonlinearity Measurement of Optical Fibers

Lamminpää, Antti; Niemi, Tapio; Ikonen, Erkki; Marttila, P.; Ludvigsen, Hanne
2004

Optical metrology of thin films using high-accuracy spectrophotometric measurements with oblique angles of incidence

Nevas, Saulius; Manoocheri, Farshid; Ikonen, Erkki; Tkhonravov, A.; Kokarev, M.; Trubetskov, M.
2004 in Proceedings of SPIE (SPIE)

GaAsP trap detector for UV measurements

Noorma, Mart; Manoocheri, Farshid; Kärhä, Petri; Ahtee, Ville; Lamminpää, Antti; Ikonen, Erkki
2004

GaAsP trap detector for radiometric measurements in 200 400 nm wavelength range

Noorma, Mart; Kärhä, Petri; Manoocheri, Farshid; Lamminpää, Antti; Ikonen, Erkki
2004

Passive stabilization of a transmission grating laser at 633 nm

Vainio, Markku; Merimaa, Mikko; Ikonen, Erkki
2004

Development of spectral comparator facility to calibrate ultraviolet detectors with low sensitivity

Envall, J.; Kärhä, P.; Ikonen, E.
2003

Improvements in dissemination of spectral irradiance calibrations

Kärhä, Petri; Ylianttila, L.; Jokela, K.; Ikonen, E.
2003

Optical metrology of thin films using high accuracy spectrophotometric measurements with oblique angles of incidence

Nevas, S.; Manoocheri, F.; Ikonen, E.; Tikhonravov, A.; Kokarev, M.; Trubetskov, M.
2003

Absolute method for radiation temperature measurements

Noorma, M.; Kärhä, P.; Jankowski, T.; Uusipaikka, L.; Weckström, T.; Ikonen, E.
2003

A portable field calibrator for solar ultraviolet measurements

Kärhä, Petri; Ylianttila, Lasse; Koskela, Timo; Jokela, Kari; Ikonen, Erkki
2002

An all-optical atomic clock based on dark states of 85Rb

Lindvall, Thomas; Merimaa, Mikko; Tittonen, Ilkka; Ikonen, Erkki
2002

Determination of thin film parameters from high accuracy measurements of spectral regular transmittance

Nevas, Saulius; Manoocheri, Farshid; Ikonen, Erkki
2002

Characterization of filter radiometers with wavelength-tunable laser source

Noorma, Mart; Toivanen, Pasi; Manoocheri, Farshid; Ikonen, Erkki
2002

All-optical atomic clock based on dark states of 85Rb

Merimaa, Mikko; Lindvall, Thomas; Tittonen, Ilkka; Ikonen, Erkki
2001

A portable laser frequency standard at 633 nm with a compact external-cavity diode laser

Merimaa, M.; Kokkonen, P.; Nyholm, P.; Ikonen, E.
2001

An all-optical atomic clock based on dark states of Rb

Merimaa, M.; Lindvall, T.; Tittonen, I.; Ikonen, E.
2001

Compact external-cavity diode laser at 633 nm with a transmission grating

Merimaa, M.; Talvitie, H.; Laakkonen, P.; Kuittinen, M.; Tittonen, I.; Ikonen, E.
2000

A compact iodine stabilized external-cavity diode laser at 633 nm with a novel transmission grating

Merimaa, M.; Kokkonen, P.; Nyholm, K.; Ikonen, E.
2000

Measurement of optical quantities at high accuracy and low cost

Ikonen, E.
1999

Interpretation of UV irradiation effects on the responsivity of silicon photodetectors

Kubarsepp, T.; Kärhä, P.; Ikonen, E.
1999

Extension of the trap-detector-based spectral irradiance scale into the ultraviolet region

Kärhä, P.; Kubarsepp, T.; Manoocheri, F.; Nevas, S.; Toivanen, P.; Ikonen, E.
1999

Spectroscopy of rubidium atoms in a magneto-optical trap

Lindvall, T.; Toivonen, J.; Tittonen, I.; Pietiläinen, A.; Ikonen, E.
1999

Compact external-cavity diode laser at 633 nm with a transmission grating

Merimaa, M.; Talvitie, H.; Tittonen, I.; Laakkonen, P.; Ikonen, E.
1999

Compact external-cavity diode laser at 633 nm with transmission grating

Merimaa, M.; Tittonen, I.; Ikonen, E.; Talvitie, H.; Laakkonen, P.; Kuittinen, M.
1999

A laser-based method for determination of irradiance responsivity of filter radiometers

Toivanen, P.; Lassila, A.; Manoocheri, F.; Kärhä, P.; Ikonen, E.
1999

Measurements of irradiance responsivity and aperture area by direct optical method

Toivanen, P.; Manoocheri, F.; Kärhä, P.; Ikonen, E.; Lassila, A.
1999

Frequency-modulation-induced coherent transient effects - investigation of trapped Rb-atoms

Kujala, M.; Pietiläinen, A.; Tittonen, I.; Ikonen, E.
1998

The Finnish scale for spectral irradiance in the ultraviolet region

Kärhä, P.; Kubarsepp, T.; Visuri, R.; Toivanen, P.; Manoocheri, F.; Jokela, K.; Ikonen, E.
1998

Interferometric refractometer with a variable-length vacuum cylinder

Lassila, A.; Tallgren, P.; Riski, K.; Ikonen, E.
1998

Iodine stabilized diode laser at 633 nm

Merimaa, M.; Talvitie, H.; Hu, J.; Ikonen, E.
1998

Iodine-stabilized diode laser at 633 nm

Merimaa, M.; Talvitie, H.; Ikonen, E.
1998

A new Hebbian type learning algorithm applied to sensor fusion

Ylinen, R.; Hyötyniemi, H.; Ikonen, E.; Kortela, U.
1998

A new optical method for high-accuracy determination of aperture area

Ikonen, E.; Lassila, A.; Toivanen, P.
1997

A polarization-independent transmission trap detector with predictable optical characteristics

Kubarsepp, T.; Kärhä, P.; Ikonen, E.
1997

Measurements of coherent transients in a magneto-optical trap

Kujala, M.; Pietiläinen, A.; Talvitie, H.; Ludvigsen, H.; Ikonen, E.
1997

Filter radiometry based on direct utilization of trap detectors

Kärhä, P.; Toivanen, P.; Haapalinna, A.; Manoocheri, F.; Ikonen, E.
1997

A detector-based spectral irradiance scale and its use in determining photometric and colorimetric quantities

Kärhä, P.; Toivanen, P.; Manoocheri, F.; Ikonen, E.
1997

High-accuracy measurement of regular spectral transmittance and reflectance in UV-visible-NIR

Manoocheri, F.; Haapalinna, A.; Ikonen, E.
1997

Frequency stabilized diode laser at 633 nm

Merimaa, M.; Talvitie, H.; Ikonen, E.
1997

Generation of continuous-wave radiation at 317 nm by frequency doubling of a diode laser

Talvitie, H.; Seppänen, A.; Äijälä, A.; Ikonen, E.
1997

Detector-based realisation of the candela

Toivanen, P.; Nyberg, H.; Kärhä, P.; Lassila, A.; Manoocheri, F.; Ikonen, E.
1997

Precision spectrometer for specular reflectance measurements

Haapalinna, A.; Manoocheri, F.; Ikonen, E.
1996

Frequency shift of iodine stabilized He-Ne laser at higher order harmonic stabilization

Hu, J.; Ahola, T.; Ikonen, E.; Riski, K.
1996

Frequency and intensity stabilization of grating-cavity diode lasers by reducing effects of enviromental parameters

Talvitie, H.; Pietiläinen, A.; Ludvigsen, H.; Ikonen, E.
1996

Detector-based Luminous Intensity Measurements

Fagerlund, H.; Kärhä, P.; Manoocheri, F.; Lassila, A.; Ludvigsen, H.; Ikonen, E.
1995

Frequency shift of [127]I_2 stabilized He-Ne laser at the 5th harmonic locking

Hu, J.; Ahola, T.; Ikonen, E.; Riski, K.
1995

Detector-based calibration of a solar UV spectroradiometer

Kärhä, P.; Fagerlund, H.; Lassila, A.; Manoocheri, F.; Ikonen, E.
1995

A Study of Rubidium Atoms in a Magneto-Optical Trap

Pietiläinen, A.; Ludvigsen, H; Talvitie, H.; Ikonen, E.
1995

Pressure effects of optical frequency in external cavity diode lasers

Talvitie, H.; Åman, J.; Ludvigsen, H.; Pietiläinen, A.; Pendrill, L.; Ikonen, E.
1995

Radiometric Realization of Candela with Trap Detector

Ikonen, E.; Kärhä, P.; Lassila, A.; Manoocheri, F.; Salven, H.; Liedquist, L.
1994

Optical Trap Detector and its use in Realization of the SI Unit Candela

Kärhä, P.; Salven, H.; Manoocheri, F.; Lassila, A.; Ikonen, E.
1994

Interferometric Line Scale Calibrator with a Moving CCD Camera as Line Detector

Lassila, A.; Ikonen, E.; Riski, K.
1994

Intercomparison of luminous intensity scales based on trap detectors and based on incandescent lamps

Liedquist, L.; Ikonen, E.; Kärhä, P.; Salven, H.
1994

An Ultra Stable Passively Stabilized External Cavity Diode Laser

Talvitie, H.; Åman, J.; Ludvigsen, H.; Pietiläinen, A.; Äijälä, A.; Pendrill, L.; Ikonen, E.
1994

A Diode-laser-based Magneto-optical Trap for Rubidium Atoms

Pietiläinen, A.; Äijälä, A.; Ludvigsen, H.; Talvitie, H.; Ikonen, E.
1993

Diode-laser-based Magneto-optical Trap for Rubidium Atoms

Pietiläinen, A.; Äijälä, A.; Ludvigsen, H.; Talvitie, H.; Ståhlberg, B.; Ikonen, E.
1993

A Pseudo-external Cavity Diode Laser with Grating Feedback

Talvitie, H.; Ludvigsen, H.; Pietiläinen, A.; Äijälä, A.; Ikonen, E.
1993

Interferometric Length Measurements

Ikonen, E.; Lassila, A.; Luukkainen, J.; Riski, K.
1992

Heterodyne Frequency Measurements of a Voltage-Controlled Diode Laser

Ludvigsen, H.; Holmlund, C.; Ikonen, E.
1992

Stability Studies of a Voltage-Controlled GaAlAs Diode Laser

Ludvigsen, H.; Holmlund, C.; Talvitie, H.; Ikonen, E.
1992

Interferometric Calibration of Long Gauge Blocks

Riski, K.; Ikonen, E.; Luukkainen, J.; Saari, J-M.
1992

Non-refereed scientific articles

Unrefereed conference proceedings

Effects of intelligent control on the lifetime of LED street lights

Baumgartner, Hans; Oksanen, Johannes; Poikonen, Tuomas; Pulli, Tomi; Kärhä, Petri; Ikonen, Erkki
2015
ISBN: 978-3-902842-55-8

ACCURATE MEASUREMENT OF ILLUMINANCE AND LUMINOUS EFFICACY OF WHITE LED LAMPS

Ikonen, Erkki; Pulli, Tomi; Dönsberg, Timo; Poikonen, Tuomas; Manoocheri, Farshid; Kärhä, Petri
2015
ISBN: 978-3-902842-55-8

TOWARDS LED-BASED PHOTOMETRIC STANDARDS

Poikonen, Tuomas; Pulli, Tomi; Dönsberg, Timo; Baumgartner, Hans; Kärhä, Petri; Ikonen, Erkki
2015
ISBN: 978-3-902842-55-8

A compact primary standard of optical power operated at room temperature

Dönsberg, Timo; Sildoja, Meelis; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki
2014

New source and detector technology for the realization of photometric units

Dönsberg, Timo; Sildoja, Meelis; Manoocheri, Farshid; Pulli, Tomi; Poikonen, Tuomas; Baumgartner, Hans; Kärhä, Petri; Ikonen, Erkki
2014

New source and detector technology for the realization of photometric units

Dönsberg, Timo; Sildoja, Meelis; Manoocheri, Farshid; Pulli, Tomi; Poikonen, Tuomas; Baumgartner, Hans; Kärhä, Petri; Ikonen, Erkki
2014

Luminous Efficacy Measurement of OLEDs Using an Integrating Sphere

Santaholma, Minna; Poikonen, Tuomas; Askola, Janne; Pulli, Tomi; Ikonen, Erkki
2014

Use of Photocurrent Ratio for Reflectance Determination of the Predictable Quantum Efficient Detector

Sildoja, Meelis; Dönsberg, Timo; Mäntynen, Henrik; Merimaa, Mikko; Manoocheri, Farshid; Ikonen, Erkki
2014

REFLECTANCE CHARACTERIZATION OF A REFERENCE TARGET TO IMPROVE THE RELIABILITY OF RADIATION TRANSFER CALCULATIONS IN EARTH OBSERVATION

Jaanson, P.; Pulli, T.; Manoocheri, F.; Ikonen, E.
2013

Relationships between junction temperature, forward voltage and spectrum of LEDs

Kärhä, Petri; Vaskuri, Anna; Baumgartner, Hans; Andor, Gyorgy; Ikonen, Erkki
2013

Effect of Rotation Axis on the Value of Photometer Directional Response Index f2

Poikonen, Tuomas; Pulli, Tomi; Kärhä, Petri; Ikonen, Erkki
2013
ISBN: 978-3-902842-44-2

Low noise detection system for mesopic and scotopic photometry

Porrovecchio, Geiland; Smid, Marek; Shpak, Maksim; Kärhä, Petri; Ikonen, Erkki
2013
ISBN: 978-3-902842-44-2

Improved Diffusers for Solar UV Measurements

Pulli, Tomi; Kärhä, Petri; Mes, Joop; Schreder, Josef; Ikonen, Erkki
2013

Characterized photopic-scotopic luminance meter for measurements in the mesopic range

Shpak, Maksim; Kärhä, Petri; Porrovecchio, Geiland; Hirvonen, Juha-Matti; Smid, Marek; Ikonen, Erkki
2013
ISBN: 978-3-902842-44-2

Radiometric determination of the junction temperature of light-emitting diodes

Vaskuri, Anna; Kärhä, Petri; Baumgartner, Hans; Oksanen, Jani; Riuttanen, Lauri; Andor, Gyorgy; Ikonen, Erkki
2013
ISBN: 978-3-902842-44-2

Uncertainty Evaluation for Linking Key Comparisons with the Corresponding CIPM Key Comparison: the CCPR Approach

Woolliams, Emma; Lee, Dong-Hoon; Ikonen, Erkki
2013

Non-contact methods for high power LED junction temperature measurement

Baumgartner, H; Vaskuri, A; Kärhä, P; Andor, G; Poikonen, T; Ikonen, E.
2012

Spectrally Tunable Radiance Source based on LEDs

Hirvonen, J.M.; Poikonen, T.; Kärhä, P.; Ikonen, Erkki
2012

Characterization of LED lamps for energy efficient lighting

Ikonen, Erkki; Poikonen, T.; Baumgartner, Hans; Kärhä, Petri; Pulli, Tomi; Vaskuri, Anna
2012
ISBN: 978-3-902842-42-8

Measurements of non-Lambertian fluorescence emission and absolute quantum yield of fluorescence standards

Jaanson, P; Manoocheri, F; Ikonen, E.
2012

A Two channel photopic-scotopic luminance meter as a basis for mesopic photometry

Shpak, Maxim; Kärhä, Petri; Porrovecchio, G.; Sjöberg, A.; Smid, M.; Ikonen, Erkki
2012

An Integrating Sphere Setup for Measurement of LED Luminous Flux

Ikonen, E; Poikonen, T; Manninen, P; Kärhä, P
2010

Photon-to-Electron Converter with 1 ppm Quantum Deficiency

Ikonen, E.; Haapalinna, A.; Sildoja, M.; Manoocheri, F.
2010

Three-pion Correlations for Studying Partial Coherence in Nuclear Collisions

Ikonen, Erkki
2010

Multiple Coherent Components in Relativistic Heavy-Ion Collisions

Ikonen, Erkki
2010
ISSN: 0094-243X

Interferometric Length Measurements

Ikonen, Erkki
2010

A Predictable Bright Single-Photon Source

Lee, K.-G.; Chen, X.; Eghlidi, H.; Ikonen, E.; Götzinger, S.; Sandoghdar, V.
2010
ISBN: 978-3-901906-89-3

Measurements of Photometer Directional Response Index f2 at MIKES and at METAS

Poikonen, Tuomas; Blattner, P.; Ikonen, Erkki
2010

Scientific books (monographs)

Book (editor)

Proceedings of Newrad 2014

Park, Seongchong; Kärhä, Petri; Ikonen, Erkki
2014

Publications intended for professional communities

Published development or research report

Predictable quantum efficient detector with light sources of uncontrolled state of polarization

Sildoja, Meelis; Dönsberg, Timo; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki
2014

Predictable Quantum Efficient Detector

Sildoja, Meelis; Dönsberg, Timo; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki
2014

Traceability at the single photon level for quantum communication

Vaigu, Aigar; Kubarsepp, Toomas; Chunnilall, Christopher J.; Porrovecchio, Geiland; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki
2014

Traceability at the single photon level for quantum communication

Vaigu, Aigar; Kübarsepp, Toomas; Manoocheri, Farshid; Merimaa, Mikko; Ikonen, Erkki
2014

High-Resolution Setup for Measuring Photoyellowing of Transparent Materials

Vaskuri, Anna; Kärhä, Petri; Mylläri, Ville; Heikkilä, Anu; Ikonen, Erkki
2014

LED-based Light Source for Spectral Radiance Responsivity Measurements of Colorimeters and Luminance Meters

Hirvonen, J.-M.; Manninen, P.; Ikonen, E.
2010

Prospects in Online Optical Identification of Polymeric Materials Future of Recycling

Hyvönen, T.; Ojanen, M.; Kärhä, P.; Ikonen, E.
2010

A New Method for Validation of Commercial Fluorescence Spectrometers

Jaanson, P.; Manoocheri, F.; Ikonen, E.
2010

Application of InGaAs Trap Detector in the Multiwavelength Filter Radiometer for Spectral Irradiance Measurement

Liu, Y.J.; Xu, G.; Chen, X.; Huang, B.; Manoocheri, F.; Ikonen, Erkki
2010

Spectral Irradiance Model for Tungsten Halogen Lamps in 340 850 nm Wavelength Range

Ojanen, Maija; Kärhä, Petri; Ikonen, Erkki
2010

Photon-to-electron converter with 1 ppm quantum deficiency

Ikonen, Erkki; Haapalinna, A.; Sildoja, Meelis; Manoocheri, Farshid
2009

Multiple coherent components in relativistic heavy-ion collisions

Ikonen, Erkki
2009

Multiple coherent components in relativistic heavy-ion collisions

Ikonen, Erkki
2009

Determination of LED luminance and radiance from effective intensity

Ikonen, Erkki; Poikonen, Tomas; Kärhä, Petri; Manninen, Pasi
2009

Imperfections in UV diffusers: practical consequences

Manninen, Pasi; Koskela, T.; Ylianttila, L.; Kärhä, Petri; Ikonen, Erkki
2009

Applicability of random and biased error models in uncertainty evaluation of photometer quality factor f1

Poikonen, Tuomas; Kärhä, Petri; Manninen, Pasi; Manoocheri, Farshid; Ikonen, Erkki
2009

A multifunctional setup for measurement of LED luminous flux based on integrating sphere method

Poikonen, Tuomas; Kärhä, Petri; Manninen, Pasi; Ikonen, Erkki
2009

Optical temperature measurement of miniature silicon emitters

Shpak, Maksm; Ojanen, Maija; Kärhä, Petri; Ikonen, Erkki; Heinonen, M.; Weckström, T.
2009

Comparison measurements of 0/45 radiance factors between 250 and 1650 nm

Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki; Hauer, K.-O.; Höpe, A.
2008

Measurement of forest-sample-plot biomass using camera and laser illumination

Ikonen, Erkki; Melkas, T.; Laasasenaho, J.; Kivilähde, J.; Merimaa, M.
2008

Confirmation of paper moisture using an infrared spectrometer

Manoocheri, Farshid; Ikonen, Erkki
2008

Comparison of the radiation temperature scales between PTB and MIKES

Ojanen, Maija; Anhalt, K.; Hartmann, J.; Weckström, T.; Kärhä, Petri; Heinonen, M.; Ikonen, Erkki
2008

Luminous flux measurement of light emitting diodes

Poikonen, Tuomas; Manninen, Pasi; Kärhä, Petri; Ikonen, Erkki
2008

Reflectance calculations for two-photodiode predictable quantum efficient detector

Sildoja, Meelis; Manoocheri, Farshid; Ikonen, Erkki
2008

Towards Indistinguishable Photons from Two Independent Molecules

Ahtee, Ville; Lettow, R.; Götzinger, S.; Wrigge, G.; Pfab, R.; Renn, A.; Ikonen, Erkki; Sandoghar, V.
2007

High-accuracy determination of fiber nonlinearity using dispersion analysis and improved power measurement

Hieta, Tuomas; Lamminpää, Antti; Ikonen, Erkki
2007

Goniofluorometer for measuring bispectral luminescent radiance factors

Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki
2007

Effective area of optical fiber using far-field scanning

Kesänen, Ari; Lamminpää, Antti; Hieta, Tuomas; Ikonen, Erkki
2007

High laser power measurement facility

Sildoja, Meelis-Mait; Manoocheri, Farshid; Ikonen, Erkki
2007

Virtual institute for fibre optic measurements

Andersson, Anne; Petersen, Jan; Ikonen, Erkki; Hedeqvist, Per-Olof
2006

Calibration of broadband ultraviolet detectors by measurement of spectral irradiance responsivity

Envall, Jouni; Kärhä, Petri; Ikonen, Erkki
2006

Dispersion analyses and optical power measurement in determination of fiber nonlinearity

Hieta, Tuomas; Lamminpää, Antti; Ikonen, Erkki
2006

On potential discrepancies between goniometric and sphere-based spectral diffuse reflectance

Holopainen, Silja; Manoocheri, Farshid; Nevas, Saulius; Ikonen, Erkki
2006

Scale realization of high fiber optic power

Lamminpää, Antti; Hieta, Tuomas; Envall, Jouni; Kärhä, Petri; Ikonen, Erkki
2006

Distance offset of the effective receiving aperture of a diffuser and its relation to angular responsivity curves

Manninen, Pasi; Hovila, Jari; Kärhä, Petri; Ylianttila, Lasse; Ikonen, Erkki
2006

Analysis of luminous intensity of light emitting diodes with modified inverse square law

Manninen, Pasi; Hovila, Jari; Kärhä, Petri; Ikonen, Erkki
2006

Polarization properties of GaAsP trap detectors

Sildoja, Meelis-Mait; Kübarsepp, Toomas; Noorma, Mart; Kärhä, Petri; Lamminpää, Antti; Nevas, Saulius; Ikonen, Erkki
2006

Results and experiences from high fibre optic power calibration comparison

Andersson, Anne; Envall, Jouni; Kärhä, Petri; Ikonen, Erkki; Petersen, Jan
2005

Comparison of spectral irradiance responsivity scales of TKK and NIST in the UVA region

Envall, Jouni; Johnson, Carol; Kärhä, Petri; Larason, Thomas; Ikonen, Erkki
2005

Calibration of broadband ultraviolet detectors by measurement of spectral irradiance responsivity

Envall, Jouni; Kärhä, Petri; Ikonen, Erkki
2005

Determination of the diffuser reference plane for accurate photometric and radiometric measurements

Hovila, Jari; Manninen, Pasi; Seppälä, Lauri; Kärhä, Petri; Ylianttila, Lasse; Ikonen, Erkki
2005

Determination of reference planes of spectroradiometer diffusers

Kärhä, Petri; Hovila, Jari; Manninen, Pasi; Seppälä, Lauri; Ylianttila, Lasse; Ikonen, Erkki
2005

Uncertainty contributions related to dispersion and power measurement in determination of fiber nonlinearity using continuous-wave self-phase modulation

Lamminpää, A.; Niemi, T.; Envall, J.; Ludvigsen, Hanne; Marttila, P.; Ikonen, E.
2005

GaAsP photodiodes and trap detector for high accuracy measurements in ultraviolet wavelength region

Lamminpää, Antti; Noorma, Mart; Nevas, Saulius; Manoocheri, Farshid; Kärhä, Petri; Ikonen, Erkki
2005

Photometry of light emitting diodes

Manninen, Pasi; Hovila, Jari; Kärhä, Petri; Ikonen, Erkki
2005

On potential discrepancies between goniometric and sphere-based spectral diffuse reflectance

Manoocheri, Farshid; Holopainen, Silja; Nevas, Saulius; Ikonen, Erkki
2005

Optical characterization of thin films using spectral reflectance and transmittance data at oblique angles of incidence

Manoocheri, Farshid; Nevas, Saulius; Lamminpää, Antti; Ikonen, Erkki
2005

Comparison measurements of spectral diffuse reflectance

Nevas, Saulius; Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki; Liu, Ye; Lang, T.H.; Xu, Gao
2005

Comparison measurements of spectral diffuse reflectance

Nevas, Saulius; Holopainen, Silja; Manoocheri, Farshid; Ikonen, Erkki; Liu, Yuanjie; Lang, Tan Hwee; Xu, Gan
2005

Analysis of the uncertainty propagation through fitting spectral irradiance data

Nevas, Saulius; Lamminpää, Antti; Kärhä, Petri; Ikonen, Erkki
2005

Radiometric temperature measurements with absolutely characterized filter radiometers in irradiance mode

Noorma, Mart; Ahtee, Ville; Lamminpää, Antti; Kärhä, Petri; Manoocheri, Farshid; Weckström, Tua; Ikonen, Erkki
2005

Detailed comparison of illuminance scale realizations of KRISS and TKK

Park, Seung Nam; Lee, Dong Hoon; Kim, Yong-Wan; Lee, In-Won; Ikonen, Erkki; Noorma, Mart; Manoocheri, Farshid
2005

Polarization sensivity of GaAsP photodetectors

Sildoja, Meelis-Mait; Kübarsepp, Toomas; Noorma, Mart; Kärhä, Petri; Lamminpää, Antti; Nevas, Saulius; Ikonen, Erkki
2005

Calibration of current-to-voltage converters for radiometric applications at picoampere level

Sipilä, Pekka; Rajala, R.; Kärhä, Petri; Manninen, Pasi; Ikonen, Erkki
2005

Special application of photometry: Calibration of a photometer measuring mari-time LED buoy lanterns

Hovila, Jari; Kärhä, Petri; Mansner, L.; Ikonen, Erkki
2004

Gonioreflectometer for measuring spectral diffuse reflectance

Nevas, Saulius; Manoocheri, Farshid; Ikonen, Erkki
2004

Characterization of thin films based on reflectance and transmittance measurements at oblique angles of incidence

Nevas, Saulius; Lamminpää, Antti; Manoocheri, Farshid; Ikonen, Erkki
2004

Excess coincidences of spontaneous and stimulated X rays

Ikonen, E.
2003

Detector based method for radiations temperature measurements

Jankowski, T.; Kärhä, P.; Noorma, M.; Weckström, T.; Uusipaikka, L.; Ikonen, E.
2003

Optical characterization of thin films using high-accuracy oblique-incidence transmittance measurements

Nevas, Saulius; Manoocheri, F.; Ikonen, E.; Tikhonravov, A.; Kokarev, M.; Trubetskov, M.
2003

Gonioreflectometer for measuring spectral diffuse reflectance

Nevas, S.; Manoocheri, F.; Ikonen, E.
2003

Instabilities in the areas of precision apertures

Noorma, M.; Kärhä, P.; Ikonen, E.
2003

Systematic change in areas of the aperture used in optical radiometry

Noorma, M.; Kärhä, P.; Ikonen, E.
2003

Widely tunable transmission grating laser for telecommunications applications

Vainio, M.; Merimaa, M.; Sidorin, Y.; Kuittinen, M.; Ikonen, E.
2003

High-intensity setup for measuring spectral irradiance responsivities of UV meters

Envall, Jouni; Kärhä, Petri; Ikonen, Erkki
2002

Study of fiber optic power measurements using photodiodes with and without integrating sphere

Envall, Jouni; Kärhä, Petri; Ikonen, Erkki
2002

Comparison of illuminance responsivity and luminous flux units between HUT and Nist

Hovila, Jari; Toivanen, Pasi; Ikonen, Erkki; Ohno, Yoshi
2002

Comparison measurements of spectral irradiance between NIST and HUT

Kübarsepp, Toomas; Yoon, H.W.; Nevas, Saulius; Kärhä, Petri; Ikonen, Erkki
2002

A portable field calibrator for solar ultraviolet measurements

Kärhä, Petri; Ylianttila, Lasse; Jokela, Kari; Ikonen, Erkki
2002

Radiometric determination of radiation temperatures

Kärhä, Petri; Noorma, Mart; Jankowski, Tomasz; Weckström, Tua; Ikonen, Erkki
2002

Study of fiber optic power measurements using photodiodes with and without integrating sphere

Kärhä, Petri; Envall, Jouni; Ikonen, Erkki
2002

Determination of thin film parameters from high accuracy spectrophotometric measurements

Nevas, Saulius; Manoocheri, Farshid; Ikonen, Erkki
2002

Characterization of filter radiometers with wavelength-tunable laser source

Noorma, Mart; Toivanen, Pasi; Manoocheri, Farshid; Ikonen, Erkki
2002

Development of a national standard for fiber optic power

Envall, J.; Karha, P.; Ikonen, E.
2001

HUT/NIST intercomparison of the units of illuminance responsivity and luminous flux

Hovila, J.; Toivanen, P.; Ikonen, E.
2001

All-optical atomic clock based on coherent population trapping in 85Rb

Merimaa, M.; Lindvall, T.; Tittonen, I.; Ikonen, E.
2001

Second harmonic generation with a transmission grating laser

Vainio, M.; Merimaa, M.; Kubarsepp, T.; Ikonen, E.
2001

Absolute measurement of luminous flux

Hovila, J.; Lahti, K.; Toivanen, P.; Vahala, E.; Tittonen, I.; Ikonen, E.
2000

Compact facility for High-accuracy measurements of spectral irradiance in the UV-VIS-NIR region

Kubarsepp, T.; Kärhä, P.; Manoocheri, F.; Nevas, S.; Toivanen, P.; Ikonen, E.
2000

Measurement of spectral diffuse reflectance based on an integrating sphere and a high-accuracy spectrometer

Nevas, S.; Manoocheri, F.; Ikonen, E.
2000

Stabilization and frequency measurements of green He-Ne lasers

Nyholm, K.; Ahola, T.; Hu, J.; Ikonen, E.
2000

Characterization of a spectroradiometer used in the realization of the unit of spectral radiance

Hovila, J.; Toivanen, P.; Kärhä, P.; Ikonen, E.
1999

Absolute spectral irradiance measurements of quartz-halogen tungsten lamps in the spectral range 290-900 nm

Kubarsepp, T.; Kärhä, P.; Manoocheri, F.; Nevas, S.; Ylianttila, L.; Ikonen, E.
1999

Interpolation of the quantum yield of silicon in the near UV

Kubarsepp, T.; Kärhä, P.; Ikonen, E.
1999

Interpretation of UV-effects on the internal quantum efficiency of silicon photodetectors

Kubarsepp, T.; Kärhä, P.; Ikonen, E.
1999

Realization of luminous flux scale using the absolute integrating sphere method

Lahti, K.; Tittonen, I.; Ikonen, E.
1999

Realization of the luminous flux unit using the absolute integrating sphere method

Lahti, K.; Hovila, J.; Toivanen, P.; Tittonen, I.; Ikonen, E.
1999

Spectroscopy of rubidium atoms in a magneto-optical trap

Lindvall, T.; Tittonen, I.; Pietiläinen, A.; Ikonen, E.
1999

Determination of uncertainties due to spectral transmittance measurements in filter radiometry

Manoocheri, F.; Nevas, S.; Kärhä, P.; Toivanen, P.; Ikonen, E.
1999

Detector stabilized fel lamps as transfer standards in an international comparison of spectral irradiance

Stock, K.D.; Raatz, K.H.; Kubarsepp, T.; Kärhä, P.; Ikonen, E.; Liedquist, L.
1999

Realisation of the units of luminance and spectral radiance at the Helsinki University of Technology

Toivanen, P.; Hovila, J.; Kärhä, P.; Ikonen, E.
1999

A digital control system for iodine stabilized lasers

Ahola, T.; Hu, J.; Ikonen, E.
1998

Linearity measurements of photodetectors

Haapalinna, A.; Kubarsepp, T.; Kärhä, P.; Ikonen, E.
1998

A tunable iodine stabilized He-Ne laser at wavelengths 543 nm, 605 nm and 612 nm

Hu, J.; Ahola, T.; Riski, K.; Ikonen, E.
1998

A novel filter radiometer for spectral irradiance and luminous intensity measurements

Kärhä, P.; Blomgvist, T.; Haapalinna, A.; Toivanen, P.; Manoocheri, F.; Ikonen, E.
1998

Filter Radiometry Based on Direct Utilisation of trap detectors

Kärhä, P.; Toivanen, P.; Haapalinna, A.; Manoocheri, F.; Ikonen, E.
1998

Characterization of optical detectors using reference instruments

Manoocheri, F.; Palva, L.; Garam, E.; Ikonen, E.
1998

Generation of Blue and UV Radiation by Frequency Doubling of Diode Lasers

Seppänen, A.; Talvitie, H.; Äijälä, A.; Ikonen, E.
1998

Frequency doubling of a diode laser near 633 nm

Talvitie, H.; Seppänen, A.; Ikonen, E.
1998

Realization of the unit of luminance based on an integrating sphere source

Toivanen, P.; Kärhä, P.; Ikonen, E.
1998

A new method for characterization of filter radiometers

Toivanen, P.; Lassila, A.; Manoocheri, F.; Kärhä, P.; Ikonen, E.
1998

Direct optical method for determination of the area of radiometric aperture

Toivanen, P.; Lassila, A.; Ikonen, E.
1998

Investigation of trapped rubidium atoms through frequency-modulation-induced coherent transient effects

Pietiläinen, A.; Kujala, M.; Ikonen, E.
1997

Generation of blue and UV radiation by frequency doubling of diode lasers

Seppänen, A.; Talvitie, H.; Äijälä, A.; Ikonen, E.
1997

Coherent transient effects of laser-cooled and trapped atoms

Pietiläinen, A.; Ludvigsen, H.; Talvitie, H.; Ikonen, E.
1996

Observation of coherent transient effects in a magneto-optical trap

Pietiläinen, A.; Ludvigsen, H.; Talvitie, H.; Ikonen, E.
1996

Observation of coherent transient effects of laser-cooled and trapped atoms

Talvitie, H.; Pietiläinen, A.; Ludvigsen, H.; Ikonen, E.
1996

High accuracy photometric measurements

Toivanen, P.; Fagerlund, H.; Kärhä, P.; Lassila, A.; Manoocheri, F.; Ikonen, E.
1996

On the Nth Harmonic Locking of the Iodine Stabilized He-Ne Laser

Hu, J.; Ahola, T.; Ikonen, E.; Riski, K.
1995

Annual Report 1992-1993

Ikonen, E.
1994

Comparison of silicon trap detectors with cryogenic absolute radiometer

Lassila, Antti; Kärhä, P.; Ikonen, E.
1994

Measurements of Laser-cooled and Trapped Rubidium Atoms

Pietiläinen, A.; Äijälä, A.; Ludvigsen, H.; Talvitie, H.; Ikonen, E.
1994

Development of UV Irradiance Standards

Ikonen, E.; Junttila, M-L.; Jokela, K.
1993

Construction and Test Measurements of a Trap Detector for Optical Power Measurements

Kärhä, Petri; Ikonen, E.
1993

Frequency Stabilization of a GaAlAs Laser to the Rubidium D2 Absorption Line

Ludvigsen, H.; Holmlund, C.; Ikonen, E.
1992

Observation of Mössbauer Resonance Line Splitting Caused by Rabi Oscillations

Tittonen, I.; Lippmaa, M.; Ikonen, E.; Linden, J.; Katila, T.
1992

Observation of NMR Transitions by Mössbauer Spectroscopy

Tittonen, I.; Lippmaa, M.; Ikonen, E.; Linden, J.; Katila, T.; Hietaniemi, J.
1992

Text book or professional handbook or guidebook or dictionary

Optiikan perusteet

Ikonen, Erkki; Laurila, T.
2012
ISBN: 951-22-4709-7

Optiikan perusteet

Ikonen, Erkki
2006
ISBN: 951-22-4709-7

Optiikan perusteet

Ikonen, Erkki
2005
ISBN: 951-22-4709-7

Optiikan perusteet

Ikonen, E.
1999

Anturitekniikan perusteita

Ikonen, E.; Lehto, A.; Wallin, P.; Äijälä, A.
1996

Uncertainty evaluation of fluorescence quantities obtained from goniometric measurements

Ikonen, E.; Jaanson, P.; Pulli, T.; Manoocheri, F.
2016

A reference material with close to Lambertian reflectance and fluorescence emission profiles

Jaanson, P.; Pulli, T.; Manoocheri, F.; Ikonen, E.
2016

Model for simulating uncertainties of TOC from multispectral measurements

Kärhä, Petri; Vaskuri, Anna; Nikke, Mikkonen,; Gröbner, Julian; Egli, Luca; Ikonen, Erkki
2016

UV Ageing Facility for Determining Action Spectra of Photodegradation for Translucent Materials

Vaskuri, Anna; Kärhä, Petri; Anu, Heikkilä,; Ikonen, Erkki
2016

High-resolution setup for measuring wavelength sensitivity of photoyellowing of translucent materials

Vaskuri, Anna; Kärhä, Petri; Heikkilä, Anu; Ikonen, Erkki
2015

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