Four-sensor time-division-multiplexed Michelson topology for low-frequency measurands

Craig McGarrity; David A. Jackson

doi:10.1117/12.141287

5 March 1993 Four-sensor time-division-multiplexed Michelson topology for low-frequency measurands

Craig McGarrity, David A. Jackson

Proceedings Volume 1797, Distributed and Multiplexed Fiber Optic Sensors II; (1993) https://doi.org/10.1117/12.141287
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

A time division multiplexed topology has been implemented using four Michelson sensor simulators and a transceiver link. The topology ensures that no light returning from the network is injected back into the laser diode. The phase sensitivity of the sensors is limited by the phase noise of the laser. Coherent noise due to Rayleigh backscattered light mixing with the signal is significantly smaller than this phase noise. A demodulated sensitivity of 25 (mu) rad/(root)Hz at 1 kHz has been achieved using the differentiate-cross-multiply technique.

Citation Download Citation

Craig McGarrity and David A. Jackson "Four-sensor time-division-multiplexed Michelson topology for low-frequency measurands", Proc. SPIE 1797, Distributed and Multiplexed Fiber Optic Sensors II, (5 March 1993); https://doi.org/10.1117/12.141287

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