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Applied Optics

Applied 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)

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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

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

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)

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