Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-09-03
1993-11-02
Dzierzynski, Paul M.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250225, 356364, 356365, 356367, 359192, G01B 1116
Patent
active
052586154
ABSTRACT:
The invention concerns apparatus for monitoring optical fibers by detecting variations in the polarization of light being transmitted through the fibers. In one embodiment the optical fibre carries non-coherent light and the incoming light is split by a passive splitter (2) connected to a polarization beam splitter (5). Variations in the output of this polarization beam splitter are detected, amplified and filtered so that they can be compared with a preset reference voltage. A counter (12) is used to detect variations. Another embodiment relates to the detection of polarization variations in coherent systems.
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Beyer James
Dzierzynski Paul M.
GPT Limited
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