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3 January 1986 Passive Homodyne Optical Grating Demodulator: Principles And Performance
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This paper describes the current status of a passive homodyne demodulator useful for extracting an optical phase signal from a fiber interferometric sensor. An optical demodulator has been developed in conjunction with a sine-cosine electrical demodulator that has a noise floor of a few prad/iffi. This passive homodyne detection has the advantage over other homodyne detection schemes in that it eliminates the need for active feedback phase modulators. The sensitivities achieved are relatively flat over a wide frequency band and temperature range. Comparisons with alternative approaches and discussions of performance data will be presented.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. T. Freidah, R. F. Cahill, A. A. Joseph, H. B. Turner, S. A. Holmes, and R. E. Wagoner "Passive Homodyne Optical Grating Demodulator: Principles And Performance", Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986);

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