Dynamic strain sensing system using a SOA based fiber ring laser with fiber Bragg gratings and an AWG demodulator

Jing Zhang; Chuanyi Tao; Jianjun Xiao; Yan Zhao; Xuhai Jiang

doi:10.1117/12.2583183

22 March 2021 Dynamic strain sensing system using a SOA based fiber ring laser with fiber Bragg gratings and an AWG demodulator

Jing Zhang, Chuanyi Tao, Jianjun Xiao, Yan Zhao, Xuhai Jiang

Author Affiliations +

Proceedings Volume 11593, Health Monitoring of Structural and Biological Systems XV; 115930D (2021) https://doi.org/10.1117/12.2583183
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

Fiber Bragg grating (FBG) sensors are popular sensing elements and have a wide application of strain monitoring in the area of structural health monitoring, medical and aerospace due to the features of electromagnetic interference resistance, high sensitivity and simplicity. Here, a simple intensity demodulation configuration based on a semiconductor ring laser is proposed for FBG dynamic strain sensing system. Due to the characteristics of semiconductor optical amplifier, it can act as the gain medium as well as light source. An arrayed waveguide grating module is adapted to be the wavelength demodulator. It is feasible for this configuration to respond when FBG is subjected to dynamic strains at a high frequency. Additionally, a simultaneous dual-channel interrogation system is in detail discussed. This interrogation scheme can be widely utilized in structure health monitoring because of its low insertion loss, high stability and low cost.

Conference Presentation

Citation Download Citation

Jing Zhang, Chuanyi Tao, Jianjun Xiao, Yan Zhao, and Xuhai Jiang "Dynamic strain sensing system using a SOA based fiber ring laser with fiber Bragg gratings and an AWG demodulator", Proc. SPIE 11593, Health Monitoring of Structural and Biological Systems XV, 115930D (22 March 2021); https://doi.org/10.1117/12.2583183

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