Novel technique and algorithm of signal interrogation in multi-channel fiber Bragg sensing system

Jie Bi; Xiaolei Zhang; Yongjun Wang; Xiangjun Xin; Qi Zhang; Yongchao Liu

doi:10.1117/12.904277

29 November 2011 Novel technique and algorithm of signal interrogation in multi-channel fiber Bragg sensing system

Jie Bi, Xiaolei Zhang, Yongjun Wang, Xiangjun Xin, Qi Zhang, Yongchao Liu

Author Affiliations +

Proceedings Volume 8311, Optical Sensors and Biophotonics III; 831125 (2011) https://doi.org/10.1117/12.904277
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

Abstract

To improve the capability and detection precision of the Fiber Bragg sensing system, the novel interrogation technique and detection algorithm based on the tunable ring laser and multiplexing technology are proposed for the multi-channel Fiber Bragg grating sensing system, which can realize the real-time monitoring of 32 channels more than 1,000 FBG sensors. Here, we use the comb filter as multi-wavelength reference instead of the traditional reference grating array. Moreover, a fast wavelength detection algorithm based on the half-power point is proposed. Compared to the Gaussian fitting algorithm, the interrogation method can be greatly improved in the precision, flexibility and working reliability.

Citation Download Citation

Jie Bi, Xiaolei Zhang, Yongjun Wang, Xiangjun Xin, Qi Zhang, and Yongchao Liu "Novel technique and algorithm of signal interrogation in multi-channel fiber Bragg sensing system", Proc. SPIE 8311, Optical Sensors and Biophotonics III, 831125 (29 November 2011); https://doi.org/10.1117/12.904277

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