Fiber optic sensor array
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United States of America Patent
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Apr 30, 1991
Grant Date -
N/A
app pub date -
Apr 16, 1990
filing date -
Apr 16, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fiber optic array for detecting and communicating the state of a plurality of spatically remote variables includes a plurality of switchable optical couplers. The couplers are located between fiber optic sense coils that cause responsive phase shifts in optical pulses launched through the array. The couplers are controlled by the parallel outputs of shift registers so that a coupler is only 'on' for the period of time required to couple out a portion of the optical energy of a pulse after passage through the adjacent sense coil and is thereafter shut 'off' to minimize crosstalk between the sensors and to optimize the output optical power.
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