Detection of dynamic strain using an SOA-fiber ring laser and an arrayed waveguide grating demodulator  

作　　者：WANG Hao TAO Chuanyi GAO Xiaofeng ZHU Yueqing WU Yiran ZHANG Jing 

机构地区：[1]Chongqing Key Laboratory of Green Energy Materials Technology and Systems,School of Science,Chongqing University of Technology,Chongqing 400054,China

出　　处：《Optoelectronics Letters》2022年第6期331-337,共7页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51874064);the Project of Graduate Innovation in Chongqing University of Technology(No.gzlcx20223295)。

摘　　要：In this letter,a fiber Bragg grating(FBG)dynamic strain sensing system using a semiconductor optical amplifier(SOA)-fiber ring laser(FRL)and an arrayed waveguide grating(AWG)demodulator is proposed.Due to the characteristics of SOA,it can act as the gain medium as well as light source.The AWG module is used as the wavelength demodulator.It is shown that SOA-based FRL sensors can accurately respond to 1.5μεdynamic strain signal with high frequency up to 120 k Hz and almost no distortion in the waveforms.Experimental results show that the system can be used for acoustic testing,such as underwater ultrasonic detection and external impact monitoring.In addition,the simultaneous dual-channel demodulated system is investigated in detail to verify the multiplexing.This dynamic strain sensing system can be widely utilized in structural health monitoring because of its high stability,low cost and good multiplexability.

关 键 词：fiber WAVEGUIDE arrayed 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]