| 光谱学与光谱分析 |
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| 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 |
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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 ℃.
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Received: 2013-07-18
Accepted: 2013-10-28
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Corresponding Authors:
WANG Zi-nan
E-mail: znwang@uestc.edu.cn
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