25 October 2016 123 km Φ-OTDR system based on bidirectional erbium-doped fiber amplifier
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Proceedings Volume 10158, Optical Communication, Optical Fiber Sensors, and Optical Memories for Big Data Storage; 101580P (2016) https://doi.org/10.1117/12.2246763
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
Based on bidirectional Erbium-doped fiber amplifier (B-EDFA), which can amplify not only forward pulse light but also backward Rayleigh scattering light, a long distance (123 km) Φ-OTDR system is demonstrate. In this system, four B-EDFAs are employed to extend sensing length. Meanwhile, by using the difference value of upper-envelope and lower-envelope of Rayleigh scattering trace, the intrusion with SNR of 5.45 dB、3.64 dB and 4.51 dB at three test points of sensing fiber is extracted.
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Xiaozhong Tian, Rui Dang, Dongjie Tan, Lu Liu, Haiming Wang, "123 km Φ-OTDR system based on bidirectional erbium-doped fiber amplifier", Proc. SPIE 10158, Optical Communication, Optical Fiber Sensors, and Optical Memories for Big Data Storage, 101580P (25 October 2016); doi: 10.1117/12.2246763; https://doi.org/10.1117/12.2246763
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