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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 19 — Jul. 1, 2012
  • pp: 4420–4429

Absolute linearity measurement of photodetectors using sinusoidal modulated radiation

Tamer F. Refaat and David G. Johnson  »View Author Affiliations


Applied Optics, Vol. 51, Issue 19, pp. 4420-4429 (2012)
http://dx.doi.org/10.1364/AO.51.004420


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Abstract

A method is presented for characterizing the linearity of photodetectors based on time-domain analysis of response to sinusoidal excitation. Nonlinearity is quantified solely from the output distortion. Relative response is converted to absolute response by including two calibration points. For low signal level, one calibration point is required, while using dark current as the second point. The response is mapped over a wider range using a series of overlapping sinusoids for calibration transfer. The method is demonstrated with a relatively linear photodiode and a nonlinear phototransistor. A Michelson interferometer is used to generate sinusoidal modulation of a laser source. Results demonstrate the potential of the proposed technique.

© 2012 Optical Society of America

OCIS Codes
(030.5630) Coherence and statistical optics : Radiometry
(040.5160) Detectors : Photodetectors
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(120.1880) Instrumentation, measurement, and metrology : Detection

ToC Category:
Detectors

History
Original Manuscript: March 28, 2012
Manuscript Accepted: April 14, 2012
Published: June 27, 2012

Citation
Tamer F. Refaat and David G. Johnson, "Absolute linearity measurement of photodetectors using sinusoidal modulated radiation," Appl. Opt. 51, 4420-4429 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-19-4420


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