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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 34, Iss. 6 — Feb. 20, 1995
  • pp: 927–933

Optimum optical local-oscillator power levels for coherent detection with photodiodes

J. Fred Holmes and Badih J. Rask  »View Author Affiliations


Applied Optics, Vol. 34, Issue 6, pp. 927-933 (1995)
http://dx.doi.org/10.1364/AO.34.000927


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Abstract

The use of an optical local oscillator for coherent detection with a photodiode can significantly reduce the responsivity of the detector because of saturation effects. Consequently, local-oscillator shot-noise-limited operation of the detector may not be possible. This effect is analyzed and formulations are developed for the optimum optical local-oscillator power level and the resultant maximum possible signal-to-noise ratio in terms of parameters derived from the photodiode current versus the optical power response curve. An effective heterodyne responsivity that can be used as a part of the specifications when one is procuring photodiodes for use in coherent detection systems is defined.

© 1995 Optical Society of America

History
Original Manuscript: September 20, 1993
Revised Manuscript: August 8, 1994
Published: February 20, 1995

Citation
J. Fred Holmes and Badih J. Rask, "Optimum optical local-oscillator power levels for coherent detection with photodiodes," Appl. Opt. 34, 927-933 (1995)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-34-6-927

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