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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 6 — Mar. 15, 2006
  • pp: 700–702

Demodulation algorithm for spatial-frequency-division-multiplexed fiber-optic Fizeau strain sensor networks

Y. J. Rao, X. J. Wang, T. Zhu, and C. X. Zhou  »View Author Affiliations

Optics Letters, Vol. 31, Issue 6, pp. 700-702 (2006)

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A demodulation algorithm for spatial-frequency-division-multiplexed fiber-optic Fizeau strain sensor networks with a large number of sensors is proposed to effectively reduce the cross talk between any two adjacent sensors and hence substantially enhance the multiplexing capability of the network, which is based on the Pisarenko algorithm. The cross talk between two fiber-optic Fizeau sensors is investigated experimentally. The experimental results show that a strain accuracy of better than ± 10 μ ϵ can be achieved even when the cavity length difference is 100 μ m . It was demonstrated that the multiplexing capability of the spatial-frequency-division-multiplexed fiber-optic Fizeau sensor network can be 5 times greater than that of the conventional fast-Fourier-transform algorithm, and this can lead to achievement of a sensing network with a multiplexing capability of as many as 1000 Fizeau sensors.

© 2006 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4230) Fiber optics and optical communications : Multiplexing
(070.4560) Fourier optics and signal processing : Data processing by optical means

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 4, 2005
Manuscript Accepted: November 17, 2005

Y. J. Rao, X. J. Wang, T. Zhu, and C. X. Zhou, "Demodulation algorithm for spatial-frequency-division-multiplexed fiber-optic Fizeau strain sensor networks," Opt. Lett. 31, 700-702 (2006)

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