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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 3 — Jan. 20, 2006
  • pp: 528–535

Development of a parallel demodulation system used for extrinsic Fabry–Perot interferometer and fiber Bragg grating sensors

Junfeng Jiang, Tiegen Liu, Yimo Zhang, Lina Liu, Ying Zha, Fan Zhang, Yunxin Wang, and Pin Long  »View Author Affiliations

Applied Optics, Vol. 45, Issue 3, pp. 528-535 (2006)

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A parallel demodulation system for extrinsic Fabry–Perot interferometer (EFPI) and fiber Bragg grating (FBG) sensors is presented, which is based on a Michelson interferometer and combines the methods of low-coherence interference and a Fourier-transform spectrum. The parallel demodulation theory is modeled with Fourier-transform spectrum technology, and a signal separation method with an EFPI and FBG is proposed. The design of an optical path difference scanning and sampling method without a reference light is described. Experiments show that the parallel demodulation system has good spectrum demodulation and low-coherence interference demodulation performance. It can realize simultaneous strain and temperature measurements while keeping the whole system configuration less complex.

© 2006 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

ToC Category:
Instrumentation, Measurement, and Metrology

Junfeng Jiang, Tiegen Liu, Yimo Zhang, Lina Liu, Ying Zha, Fan Zhang, Yunxin Wang, and Pin Long, "Development of a parallel demodulation system used for extrinsic Fabry-Perot interferometer and fiber Bragg grating sensors," Appl. Opt. 45, 528-535 (2006)

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