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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 21 — Oct. 12, 2009
  • pp: 18501–18512

Multiplexing of polarization-maintaining photonic crystal fiber based Sagnac interferometric sensors

H. Y. Fu, A. C. L. Wong, P. A. Childs, H. Y. Tam, Y. B. Liao, C. Lu, and P. K. A. Wai  »View Author Affiliations


Optics Express, Vol. 17, Issue 21, pp. 18501-18512 (2009)
http://dx.doi.org/10.1364/OE.17.018501


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Abstract

Three multiplexing schemes are presented for polarization-maintaining photonic crystal fiber based Sagnac interferometric sensors. The first technique is wavelength division multiplexing using coarse wavelength division multiplexers (CWDMs) to distinguish signals from each multiplexed sensor in different wavelength channels. The other two schemes are to multiplex sensors in series along a single fiber link and in parallel by using fiber-optic couplers. While for the CWDM scheme, the multiplexed sensing signal can be obtained by direct measurement; for the other two multiplexing techniques, the sensing signal is more complex and cannot be easily demultiplexed. Thus, some signal processing methods are required. In this regard, two mathematical transformations, namely the discrete wavelet transform and Fourier transform, have been independently and successfully implemented into these two schemes. The operating principles, experimental setup, and overall performance are discussed.

© 2009 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2420) Fiber optics and optical communications : Fibers, polarization-maintaining
(060.4230) Fiber optics and optical communications : Multiplexing
(120.5790) Instrumentation, measurement, and metrology : Sagnac effect
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 10, 2009
Revised Manuscript: September 20, 2009
Manuscript Accepted: September 21, 2009
Published: September 29, 2009

Citation
H. Y. Fu, A. C. L. Wong, P. A. Childs, H. Y. Tam, Y. B. Liao, C. Lu, and P. K. A. Wai, "Multiplexing of polarization-maintaining photonic crystal fiber based Sagnac interferometric sensors," Opt. Express 17, 18501-18512 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-21-18501


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