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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 20 — Jul. 10, 2007
  • pp: 4228–4236

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

Ville Ahtee, Steven W. Brown, Thomas C. Larason, Keith R. Lykke, Erkki Ikonen, and Mart Noorma  »View Author Affiliations

Applied Optics, Vol. 46, Issue 20, pp. 4228-4236 (2007)

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Independent methods for measuring the absolute spectral irradiance responsivity of detectors have been compared between the calibration facilities at two national metrology institutes, the Helsinki University of Technology (TKK), Finland, and the National Institute of Standards and Technology (NIST). The emphasis is on the comparison of two different techniques for generating a uniform irradiance at a reference plane using wavelength-tunable lasers. At TKK's Laser Scanning Facility (LSF) the irradiance is generated by raster scanning a single collimated laser beam, while at the NIST facility for Spectral Irradiance and Radiance Responsivity Calibrations with Uniform Sources (SIRCUS), lasers are introduced into integrating spheres to generate a uniform irradiance at a reference plane. The laser-based irradiance responsivity results are compared to a traditional lamp-monochromator-based irradiance responsivity calibration obtained at the NIST Spectral Comparator Facility (SCF). A narrowband filter radiometer with a 24 nm bandwidth and an effective band-center wavelength of 801 nm was used as the artifact. The results of the comparison between the different facilities, reported for the first time in the near-infrared wavelength range, demonstrate agreement at the uncertainty level of less than 0.1%. This result has significant implications in radiation thermometry and in photometry as well as in radiometry.

© 2007 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5630) Instrumentation, measurement, and metrology : Radiometry

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: December 19, 2006
Revised Manuscript: February 23, 2007
Manuscript Accepted: February 26, 2007
Published: June 20, 2007

Ville Ahtee, Steven W. Brown, Thomas C. Larason, Keith R. Lykke, Erkki Ikonen, and Mart Noorma, "Comparison of absolute spectral irradiance responsivity measurement techniques using wavelength-tunable lasers," Appl. Opt. 46, 4228-4236 (2007)

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