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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 13 — May. 1, 2005
  • pp: 2482–2489

Establishing a high-accuracy spectral response scale in the near infrared with digital filters

Jarle Gran, Kristian Ellingsberg, and Aasmund S. Sudbø  »View Author Affiliations


Applied Optics, Vol. 44, Issue 13, pp. 2482-2489 (2005)
http://dx.doi.org/10.1364/AO.44.002482


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Abstract

Spectrally invariant detectors are commonly used to interpolate or extrapolate the responsivity of InGaAs detectors in the infrared from absolute calibrations at a few wavelengths. The random noise in such detectors limits the accuracy that can be achieved in a narrowband, double-monochromator setup. We propose the application of a dedicated digital filter, which reduces the uncertainty by 30%, and combine it by calibrating a group of three detectors. The uncertainties are propagated from the observed variance in the relative measurement to the combined uncertainty of 0.4% (2σ) in the responsivity values of the InGaAs detectors in the range of 1010–1640 nm.

© 2005 Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(040.5160) Detectors : Photodetectors
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5630) Instrumentation, measurement, and metrology : Radiometry

History
Original Manuscript: May 13, 2004
Revised Manuscript: September 27, 2004
Manuscript Accepted: December 1, 2004
Published: May 1, 2005

Citation
Jarle Gran, Kristian Ellingsberg, and Aasmund S. Sudbø, "Establishing a high-accuracy spectral response scale in the near infrared with digital filters," Appl. Opt. 44, 2482-2489 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-13-2482


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References

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  2. D. H. Nettleton, T. R. Prior, T. H. Ward, “Improved spectral responsivity scales at the NPL, 400 nm to 20 µm,” Metrologia 30, 425–432 (1993). [CrossRef]
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  9. J. Gran, A. S. Sudbø, “Absolute calibration of silicon photodiodes by purely relative measurements,” Metrologia 41, 204–212 (2004). [CrossRef]

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