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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 28, Iss. 8 — Apr. 15, 2010
  • pp: 1228–1235

Optical Comb Sources and High-Resolution Optical Filtering for Measurement of Photodiode Harmonic Distortion

Jason D. McKinney, Daniel E. Leaird, Alex S. Hastings, Andrew M. Weiner, and Keith J. Williams

Journal of Lightwave Technology, Vol. 28, Issue 8, pp. 1228-1235 (2010)

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In this work we preset a new technique for measurement of harmonic distortion in microwave photodiodes. Our technique 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 measurements performed using optical heterodyne techniques.

© 2010 IEEE

Jason D. McKinney, Daniel E. Leaird, Alex S. Hastings, Andrew M. Weiner, and Keith J. Williams, "Optical Comb Sources and High-Resolution Optical Filtering for Measurement of Photodiode Harmonic Distortion," J. Lightwave Technol. 28, 1228-1235 (2010)

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