典型文献
Coherent-detection-based distributed acoustic impedance sensing enabled by a chirped fiber Bragg grating array
文献摘要：
Distributed optical fiber sensing exploring forward stimulated Brillouin scattering(FSBS)has received wide at-tention,as it indicates a new sensing method to measure the liquid property surrounding an optical fiber.In the existing techniques,backward stimulated Brillouin scattering is adopted for detection of the sensing signal,which requires time-consuming signal acquisition and post-processing.In this work,an approach that distributedly measures FSBS spectra is proposed and demonstrated based on coherent detection.While an excitation pulse with single-frequency amplitude modulation is used to induce a guided acoustic mode in the fiber,a following pulse is adopted to probe the induced phase modulation.Using a chirped fiber Bragg grating array,an enhanced-backward-propagating sensing signal is generated from the probe pulse.Heterodyne coherent-detection-based phase demodulation is then realized by mixing the sensing signal with a local oscillator.The FSBS spectra can then be reconstructed from the beat signals with only one round of frequency sweeping.With significantly accelerated signal acquisition and simplified post-processing,the proposed distributed acoustic sensing system has achieved spatial resolution of 5 m over a 500-m sensing range.
文献关键词：
中图分类号：
作者姓名：
ZHOU ZHENG;ZHENGYING LI;XUELEI FU;XIN GUI
作者机构：
Hubei Key Laboratory of Broadband Wireless Communication and Sensor Networks,School of Information Engineering,Wuhan University of Technology,Wuhan 430070,China;National Engineering Laboratory for Fiber Optic Sensing Technology,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China
文献出处：
引用格式：
[1]ZHOU ZHENG;ZHENGYING LI;XUELEI FU;XIN GUI-.Coherent-detection-based distributed acoustic impedance sensing enabled by a chirped fiber Bragg grating array)[J].光子学研究（英文）,2022(06):1325-1331
A类：
FSBS,distributedly,Heterodyne
B类：
Coherent,detection,acoustic,impedance,sensing,enabled,by,chirped,fiber,Bragg,grating,array,Distributed,optical,exploring,forward,stimulated,Brillouin,scattering,received,wide,tention,indicates,new,method,liquid,property,surrounding,In,existing,techniques,backward,adopted,which,requires,consuming,acquisition,post,processing,this,work,approach,that,measures,spectra,proposed,demonstrated,coherent,While,excitation,pulse,single,frequency,amplitude,used,guided,mode,following,probe,induced,phase,Using,enhanced,propagating,generated,from,demodulation,then,realized,mixing,local,oscillator,reconstructed,beat,signals,only,one,sweeping,With,significantly,accelerated,simplified,system,achieved,spatial,resolution,over,range
AB值：
0.494899
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