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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 13 — Jun. 22, 2009
  • pp: 11077–11087

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

Ian C. M. Littler, Malcolm B. Gray, Jong H. Chow, Daniel A. Shaddock, and David E. McClelland  »View Author Affiliations

Optics Express, Vol. 17, Issue 13, pp. 11077-11087 (2009)

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An integrated sensor system is presented which displays passive long range operation to 100 km at pico-strain (pε) 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.

© 2009 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4230) Fiber optics and optical communications : Multiplexing
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.3425) Lasers and laser optics : Laser stabilization
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 3, 2009
Revised Manuscript: April 30, 2009
Manuscript Accepted: June 15, 2009
Published: June 18, 2009

Ian C. M. Littler, Malcolm B. Gray, Jong H. Chow, Daniel A. Shaddock, and David E. McClelland, "Pico-strain multiplexed fiber optic sensor array operating down to infra-sonic frequencies," Opt. Express 17, 11077-11087 (2009)

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