标题:Improved distributed fiber optic sensing system based on single-ended double-pulse input Brillouin scattering
作者:Chang, Tianying; Yang, Ruijuan; Wang, Yongliang; Li, David Y.; Jia, Lei; Cui, Hong-Liang
通讯作者:Chang, T.
作者机构:[Chang, Tianying; Yang, Ruijuan; Cui, Hong-Liang] Jilin Univ, Coll Instrumentat & Elect Engn, Changchun 130023, Jilin, Peoples R China.; [Li, David 更多
会议名称:Conference on Smart Sensor Phenomena, Technology, Networks, and Systems Integration
会议日期:MAR 10-11, 2014
来源:SMART SENSOR PHENOMENA, TECHNOLOGY, NETWORKS, AND SYSTEMS INTEGRATION 2014
出版年:2014
卷:9062
DOI:10.1117/12.2043924
关键词:Brillouin scattering; BOTDR; single-ended double-pulse; pump and probe;; spatial resolution
摘要:In a new distributed fiber optic sensing system, single-ended double-pulse input is used to strengthen Brillouin backscattered light by increasing the population of acoustic phonons. The first pulse (pump pulse), has a wide pulse-width (tens or hundreds of us) and is used to generate a nonlinear population of acoustic phonons in the sensing fiber. Whereas the second pulse (probe pulse) has a different central wavelength and a much narrower pulse-width (several ns), and is emitted into the sensing fiber with a controlled time delay to absorb the generated abundant acoustic phonons, so that strong Anti-Stokes light can be generated. In this way, Brillouin backscattered light can be detected easily, leading to higher signal to noise ratio and better spatial resolution (less than 1 m), as well as good temperature and strain resolution, and longer sensing distance.
收录类别:CPCI-S;EI;SCOPUS
资源类型:会议论文;期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84900331897&doi=10.1117%2f12.2043924&partnerID=40&md5=032b9ff74abd083592afb511e0ce9a5f
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