A novel interrogation technique for time-division multiplexing fiber Bragg grating sensor arrays

Shengchun Liu; Youlong Yu; Jintao Zhang; Sun Fei

doi:10.1117/12.745990

21 November 2007 A novel interrogation technique for time-division multiplexing fiber Bragg grating sensor arrays

Shengchun Liu, Youlong Yu, Jintao Zhang, Sun Fei

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 67812M (2007) https://doi.org/10.1117/12.745990
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

A novel interrogation method with multi-switches channels for time-division multiplexing Fiber Bragg Grating (FBG) sensor system is introduced. An electric switches array controlled by a complex programmable logic device (CPLD) is used in this scheme to monitoring simultaneously each sensor of the FBG array according to the different transmition times of each sensor grating. In this paper, More than 10 FBG sensors are interrogated and demodulated simultaneously base on unbalanced Michelson interferometer. The sensing sensitivity of this system is 1.658 Deg per micro-strain, experimentally. The interrogation frequency of the system could reach 1 KHz.

Citation Download Citation

Shengchun Liu, Youlong Yu, Jintao Zhang, and Sun Fei "A novel interrogation technique for time-division multiplexing fiber Bragg grating sensor arrays", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67812M (21 November 2007); https://doi.org/10.1117/12.745990

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