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Proceedings Paper

Passive Homodyne Optical Grating Demodulator: Principles And Performance
Author(s): J. T. Freidah; R. F. Cahill; A. A. Joseph; H. B. Turner; S. A. Holmes; R. E. Wagoner
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Paper Abstract

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.

Paper Details

Date Published: 3 January 1986
PDF: 8 pages
Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); doi: 10.1117/12.949774
Show Author Affiliations
J. T. Freidah, McDonnell Douglas Astronautics Company (United States)
R. F. Cahill, McDonnell Douglas Astronautics Company (United States)
A. A. Joseph, McDonnell Douglas Astronautics Company (United States)
H. B. Turner, McDonnell Douglas Astronautics Company (United States)
S. A. Holmes, McDonnell Douglas Astronautics Company (United States)
R. E. Wagoner, McDonnell Douglas Astronautics Company (United States)


Published in SPIE Proceedings Vol. 0566:
Fiber Optic and Laser Sensors III
Emery L. Moore; O. Glenn Ramer, Editor(s)

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