Vibrating optical fiber accelerometer and gyroscope
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United States of America Patent
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Jul 5, 1988
Grant Date -
N/A
app pub date -
Oct 7, 1985
filing date -
Oct 7, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided by this invention a fiber optic transducer for accelerometers and gyroscopes that utilize an optical fiber suspended between two points and supported on a vibrating platform such that the optical fiber is deflected to cause light passing through the fiber to be phase modulated. When the device is accelerated, the deflection of the vibrating fiber is assymetrical, and the light passing through the fiber is phase modulated at frequency `f` and odd harmonics of `f`. The first in odd harmonic phase modulation has an amplitude proportional to the acceleration and a phase relative to the driving signal that depends on the direction of acceleration.
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