Optical-fiber gyroscope of sagnac type having a fiber-optic loop and 3.times.3 coupler
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United States of America Patent
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Jul 31, 1990
Grant Date -
N/A
app pub date -
Feb 24, 1989
filing date -
Feb 25, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical-fiber gyroscope of the Sagnac type consists of a fiber-optic loop and a 3.times.3 coupler, composed of three optically coupled fiber-optic guides, whereby a first fiber-optic guide of the 3.times.3 coupler is coupled to an optical radiation source and the two other fiber-optic guides of the 3.times.3 coupler are coupled on one end to one end of the fiber-optic loop and, on the other end, to a radiation detecting instrument. The first fiber-optic guide of the 3.times.3 coupler features a radiation detecting instrument on the end opposite the radiation source, with which interference-related variations in the light source, as well as in the 3.times.3 coupler, can be detected.
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