Optical comb sources and high-resolution optical filtering for measurement of photodiode harmonic distortion

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Author
McKinney, Jason D.
Leiard, Daniel E.
Hastings, Alex S.
Weiner, Andrew M.
Williams, Keith J.
Date
2010-04-15Metadata
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In this work we preset a new technique for measurement of harmonic distortion in microwave photodiodes. Our techniques combines optical combs and high-resolution optical filtering to provide a pure optical-two-tone excitation of the photodiode. Our technique removes the challenges presented by laser frequency drift and modulator bias control by utilizing a single laser and phase-modulation to synthesize the optical combs. We demonstrate our technique through measurement of the harmonic distortion generated in a commercial InGaAs photodiode and compare our results with those obtained via phase-locked laser measurements. We show that this technique provides essentially equivalent measurement fidelity to phase-locked laser techniques while offering decreased system complexity. We additionally provide a general discussion of the limits of nonlinearity measurement performed using optical heterodyne techniques.
Description
The article of record as published may be found at http://dx.doi.org/10.1109/JLT.2010.2044632
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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