Pico-strain multiplexed fiber optic sensor array operating down to infra-sonic frequencies

Pico-strain multiplexed fiber optic sensor array operating down to infra-sonic frequencies

An integrated sensor system is presented which displays passive long range operation to 100 km at pico-strain (pepsilon) sensitivity to low frequencies (4 Hz) in wavelength division multiplexed operation with negligible cross-talk (better than -75 dB). This has been achieved by pre-stabilizing and m...

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Veröffentlicht in:Optics express 2009-06, Vol.17 (13), p.11077-11087
Hauptverfasser: Littler, Ian C M, Gray, Malcolm B, Chow, Jong H, Shaddock, Daniel A, McClelland, David E
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container_issue 13
container_start_page 11077
container_title Optics express
container_volume 17
creator Littler, Ian C M
Gray, Malcolm B
Chow, Jong H
Shaddock, Daniel A
McClelland, David E
description An integrated sensor system is presented which displays passive long range operation to 100 km at pico-strain (pepsilon) sensitivity to low frequencies (4 Hz) in wavelength division multiplexed operation with negligible cross-talk (better than -75 dB). This has been achieved by pre-stabilizing and multiplexing all interrogation lasers for the sensor array to a single optical frequency reference. This single frequency reference allows each laser to be locked to an arbitrary wavelength and independently tuned, while maintaining suppression of laser frequency noise. With appropriate packaging, such a multiplexed strain sensing system can form the core of a low frequency accelerometer or hydrophone array.
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title Pico-strain multiplexed fiber optic sensor array operating down to infra-sonic frequencies
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