首页|Detection of dynamic strain using an SOA-fiber ring laser and an arrayed waveguide grating demodulator
Detection of dynamic strain using an SOA-fiber ring laser and an arrayed waveguide grating demodulator
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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 charac-teristics 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 1.5 uε dynamic strain signal with high frequency up to 120 kHz 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.
WANG Hao、TAO Chuanyi、GAO Xiaofeng、ZHU Yueqing、WU Yiran、ZHANG Jing
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Chongqing Key Laboratory of Green Energy Materials Technology and Systems,School of Science,Chongqing Uni-versity of Technology,Chongqing 400054,China
国家自然科学基金Project of Graduate Innovation in Chongqing University of Technology
NETL
NSTL
万方数据
维普
