Acta Photonica Sinica, Volume. 40, Issue 7, 998(2011)
DarkPulse Brillouin Optical Time Domain Analyzer for kmRange Detection with Only One Fiber Section
In darkpulse Brillouin optical time domain analyzer (DPBOTDA) DPBOTDA the effective sensing length is greatly limited by the severe interaction between the QuasiCW pump light and pump light. A simple DPBOTDA was proposed to prolong the total sensing length without using multisection fibers. To mitigate the impact of the high power QuasiCW pump light, both Brillouin gain and loss effect along fiber were measured simultaneously in this scheme, yielding the Brillouin signal by subtracting the two side bands of the optical carrier suppressed (OCS) Stokes light. Based on this proposal, the total sensing length in DPBOTDA could be increased. Simulations and discussions were conducted to validate the proposal, and the results are useful for designing high spatial resolution distributed Brillouin fiber sensor.
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LIU Lei, ZHANG Zhiguo, ZHANG Min, LIU Mingtao, ZHANG Xiaopin. DarkPulse Brillouin Optical Time Domain Analyzer for kmRange Detection with Only One Fiber Section[J]. Acta Photonica Sinica, 2011, 40(7): 998
Received: Dec. 22, 2010
Accepted: --
Published Online: Aug. 10, 2011
The Author Email: Lei LIU (liulei098332@gmail.com)