Spectroscopy and Spectral Analysis, Volume. 34, Issue 5, 1191(2014)
94 km Brillouin Distributed Optical Fiber Sensors Based on Ultra-Long Fiber Ring Laser Pumping
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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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[J]. Spectroscopy and Spectral Analysis, 2014, 34(5): 1191
Received: Jul. 18, 2013
Accepted: --
Published Online: May. 6, 2014
The Author Email: Cheng-xu YUAN (yuan07150215@126.com)