BOTDA sensor with 2-m spatial resolution over 120 km distance using bi-directional distributed Raman amplification

Marcelo A. Soto, Stefano Faralli, Mohammad Taki, Gabriele Bolognini, Fabrizio Di Pasquale
2011 21st International Conference on Optical Fiber Sensors  
In this paper we propose the use of optimized bi-directional distributed Raman amplification to enhance the operating range of Brillouin optical time-domain analysis (BOTDA) sensors. In particular by combining high-power fiber-Raman lasers and polarization-multiplexed Fabry-Pérot lasers operating at 1450 nm with low relative-intensity-noise (RIN), we demonstrate distributed sensing (using first-order Raman amplification) over 120 km of standard single-mode fiber with 2 meter spatial resolution
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doi:10.1117/12.884979 fatcat:7ubkhe6dg5flxia33q2g3xewli