Chinese Optics Letters, 2017, 15 (7): 070605, Published Online: Jul. 20, 2018   

Spectrum-profile-identification-based wavelength division multiplexing method for a fiber Bragg grating sensor Download: 724次

Author Affiliations
1 Key Laboratory of Optoelectronics Information Technology, Institute of Optical Fiber Sensing of Tianjin University, MEC, Tianjin 300072, China
2 School of Computer and Information Engineering, Tianjin Chengjian University, Tianjin 300384, China
Abstract
A new wavelength division multiplexing method for fiber Bragg grating (FBG) sensors based on spectrum profile identification is proposed. In this method, FBGs and tilted FBG (TFBG) sensors are cascaded in a single fiber in one sensing channel. The different spectrum profiles enable the cross-correlation method to demodulate the wavelength. Therefore, the different types of sensors can occupy the same central wavelength band. Using this method, the multiplexing capacity is optimized. Experiment results demonstrate the feasibility of this method and it is useful for applications where large numbers of FBGs are needed.

Yuheng Pan, Junfeng Jiang, Weijia Lu, Huijia Yang, Kun Liu, Shuang Wang, Hui Wang, Tiegen Liu. Spectrum-profile-identification-based wavelength division multiplexing method for a fiber Bragg grating sensor[J]. Chinese Optics Letters, 2017, 15(7): 070605.

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