OPTICAL SENSOR SYSTEM UTILIZING BRAGG GRATING SENSORS

摘要

An optical system for detecting perturbations indicative of the performance ofthe piece of equipment being monitored is disclosed.The optical system comprises sensors (12), each of which uses Bragg gratings(12A-12N), induced therein and wherein the Bragg gratings(12A-12N) are arranged into a preselected distribution and each Bragg gratingreturns, when subjected to incident light, a narrowbeamsignal (22, 24, 26) identified by a predetermined wavelength. The opticalsystem utilizes at least one interferometer (56) whose operationis interlinked with optical multiplexing techniques, such as differentiate-cross-multiplying and time-division multiplexing.