journal6 ›› 2014, Vol. 35 ›› Issue (6): 48-53.DOI: 10.3969/j.issn.1007-2985.2014.06.013

• Physics and electronics • Previous Articles     Next Articles

Research Progress of a New Generation of Smart Fiber Sensing Networks and the Key Devices

 LIU  Tie-Gen, QIN  Zun-Qi, LU  Ying, JIANG  Jun-Feng, ZHANG  Hong-Xia, LIU  Kun   

  1. (1.College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China;2.Key Laboratory of Optoelectronics Information Technology,Ministry of Education,Tianjin 300072,China)
  • Online:2014-11-25 Published:2014-11-27

Abstract: By the funding of 973 projects,Tianjin University launched studies on fiber sensing technologies,mainly including the design of  a PCF-SPR sensor based on photonic crystal fiber filling with silver wire,with optimum sensitivity of  2 400 nm/RIU,the design of a PBG-PCF temperature sensor based on liquid core photonic crystal fiber,with maximum resolution of 4×106 nm/RIU,the design of a tunable thermo optical switch based on photonic crystal fiber filled with toluene-chloroform mixed solution,which had different temperature transition points by changing the ratio of the solution,the construction of three kinds of structure models based on the theory of optofluidics,with studies on the mode distributions and the detection of the magnet,and the establishment of the optical gas sensing system based on L-band EDFA with absolute error  less than 0.04%.According to the sensor structure,the optical path demodulation and the demodulation algorithm,the F-P sensing system was designed and optimized.A method of evaluating the robustness of the fiber sensing network was presented.Studies of comb tunable light source technology and OFDR technology in fiber sensing network detection were developed.

Key words: fiber optic sensing, photonic crystal fiber sensing, optofluidics, gas sensing, F-P sensor, fiber sensing network

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