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Opt Lett. 1987 Oct 1;12(10):775-7.

Time-division multiplexing of interferometric fiber sensors using passive phase-generated carrier interrogation.

Abstract

The multiplexing and demodulation of interferometric sensors using a time-division/phase-generated carrier approach is described. The scheme uses slightly unbalanced interferometers and laser frequency modulation to effect the interrogation of the sensors, while the time-division multiplexing allows individual sensors to be addressed. Phase sensitivities of ~20 microrad/ radicalHz and cross-talk levels of <-47 dB are demonstrated for a three-sensor network.

PMID:
19741868
[PubMed]
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