Fiber optic sensor system having circulators, Bragg gratings...

Details Fiber optic sensor system having circulators, Bragg gratings... Fiber optic sensor system having circulators, Bragg gratings...

2011-01-04

2011-01-04

Lyons, Michael A (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

C356S480000

Reexamination Certificate

active

07864329

ABSTRACT:
A method and apparatus for detecting seismic vibrations using a series of MEMS units, with each MEMS unit including an interferometer is described. The interferometers on the MEMS units receive and modulate light from two differing wavelengths by way of a multiplexing scheme involving the use of Bragg gratings and light circulators, and an optoelectronic processor receives and processes the modulated light to discern vibrational movement of the system, which in turn allows for monitoring and calculation of a specified environmental parameter, such as seismic activity, temperature or pressure.

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