94 km Brillouin Distributed Optical Fiber Sensors Based on Ultra-Long Fiber Ring Laser Pumping
YUAN Cheng-xu, WANG Zi-nan*, JIA Xin-hong, LI Jin, YAN Xiao-dong, CUI An-bin
Key Laboratory of Optical Fiber Sensing & Communications, Ministry of Education, School of Communication & Information Engineering, University of Electronic Science & Technology of China, Chengdu 611731, China
Abstract：A novel optical amplification configuration based on ultra-long fiber laser with a ring cavity was proposed and applied to Brillouin optical time-domain analysis (BOTDA) sensing system, in order to extend the measurement distance significantly. The parameters used in the experiment were optimized, considering the main limitations of the setup, such as depletion, self-phase modulation (SPM) and pump-signal relative intensity noise (RIN) transfer. Through analyzing Brillouin gain spectrum, we demonstrated distributed sensing over 94 km of standard single-mode fiber with 3 meter spatial resolution and strain/temperature accuracy of 28 /1.4 ℃.
Key words：Brillouin gain spectrum;Fiber sensor;Ultra-long fiber laser;Distributed amplification
袁程旭，王子南*，贾新鸿，黎 进，闫晓东，崔安彬 . 基于超长环形激光器泵浦的94 km布里渊分布式传感系统 [J]. 光谱学与光谱分析, 2014, 34(05): 1191-1195.
YUAN Cheng-xu, WANG Zi-nan*, JIA Xin-hong, LI Jin, YAN Xiao-dong, CUI An-bin . 94 km Brillouin Distributed Optical Fiber Sensors Based on Ultra-Long Fiber Ring Laser Pumping . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(05): 1191-1195.
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