Sensing a disturbance along an optical path

Details Sensing a disturbance along an optical path Sensing a disturbance along an optical path

2011-06-14

2011-06-14

Lyons, Michael A (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

C356S035500, C356S073100

Reexamination Certificate

active

07961331

ABSTRACT:
The present invention relates to a system for sensing a disturbance in a sensing region along an optical path. The sensing system includes: a source of optical radiation; an upstream junction for channelling light along a first path and along a second path, the first and second paths each extending through the sensing region in an acoustically coupled relationship, such that, in use, a disturbance experienced at one of the first and second paths is experienced at the other of the first and second paths; and, a downstream junction for combining light from the first path with light from the second path so as to provide an interferometric signal from which the presence of a disturbance can be inferred.

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