Fiber optic sensor

Abstract From the Canadian patent

The invention is an optical fiber sensor system in which an optical source, such as a laser diode emits a, pulse of optical energy which is transmitted in an optical path through an optical energy modulator. A partial reflector, included in the optical path before the optical modulator, reflects a portion of the optical energy of the pulse. The optical path terminates in an optical reflector, where the pulse is reflected back through the optical modulator to the partial reflector. The optical energy reflected by the partial reflector and the terminating reflector travels along the same optical path from the partial reflector to a photodetector and demodulator, where the magnitude of the …