Review:distributed time-domain sensors based on Brillouin scattering and FWM enhanced SBS for temperature,strain and acoustic wave detection  

作　　者：Xiaoyi Bao Zichao Zhou Yuan Wang 

机构地区：[1]School of Electrical Engineering and Computer Science,University of Ottawa,Ottawa,Ontario K1N 6N5,Canada [2]Department of Physics,University of Ottawa,25 Templeton Street,Ottawa,Ontario K1N 6N5,Canada

出　　处：《PhotoniX》2021年第1期232-260,共29页智汇光学（英文）

基　　金：Canada Research Chairs(950231352);Natural Sciences and Engineering Research Council of Canada(RGPIN-2020-06302,STPGP 506628–17).

摘　　要：Distributed time-domain Brillouin scattering fiber sensors have been widely used tomeasure the changes of the temperature and strain. The linear dependence of thetemperature and strain on the Brillouin frequency shift enabled the distributedtemperature and strain sensing based on mapping of the Brillouin gain spectrum. Inaddition, an acoustic wave can be detected by the four wave mixing (FWM)associated SBS process, in which phase matching condition is satisfied via up-downconversion of SBS process through birefringence matching before and after theconversion process. Brillouin scattering can be considered as the scattering of apump wave from a moving grating (acoustic phonon) which induces a Dopplerfrequency shift in the resulting Stokes wave. The frequency shift is dependent onmany factors including the velocity of sound in the scattering medium as well as theindex of refraction. Such a process can be used to monitor the gain of random fiberlaser based on SBS, the distributed acoustic wave reflect the distributed SBS gain forrandom lasing radiation, as well as the relative intensity noise inside the laser gainmedium. In this review paper, the distributed time-domain sensing system based onBrillouin scattering including Brillouin optical time-domain reflectometry (BOTDR),Brillouin optical time-domain analysis (BOTDA), and FWM enhanced SBS for acousticwave detection are introduced for their working principles and recent progress. Thedistributed Brillouin sensors based on specialty fibers for simultaneous temperatureand strain measurement are summarized. Applications for the Brillouin scatteringtime-domain sensors are briefly discussed.

关 键 词：SCATTERING PUMP BRILLOUIN 

分 类 号：TN2[电子电信—物理电子学]