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

Ü H.Y. Fu, A. C.L. Wong, P. A. Childs, Hwa Yaw Tam, Y. B. Liao, Chao Lu, Ping Kong Alexander Wai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

53 Citations (Scopus)


Three multiplexing schemes are presented for polarizationmaintaining 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.
Original languageEnglish
Pages (from-to)18501-18512
Number of pages12
JournalOptics Express
Issue number21
Publication statusPublished - 12 Oct 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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