Distributed fiber grating sensing systems using birefringence fiber interferometers for detecting wavelength shifts
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United States of America Patent
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Oct 2, 2001
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app pub date -
Sep 21, 1999
filing date -
Sep 21, 1999
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Abstract
A distributed fiber-grating-based sensing system, the system comprises one or more scanned birefringence fiber interferometers to detect the small wavelength shift of the light reflected from the fiber grating, a wavelength demultiplexer to separate the lights from each fiber grating, a reference fiber grating for determining the absolute optical wavelengths. Compared with the prior art, the system has advantages of easier fabrication, better stabilization, and can be customized for different applications.
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