25 October 2017 Long distance Φ-OTDR system based on Raman and EDFA synthetic amplification
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Proceedings Volume 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications; 104640X (2017) https://doi.org/10.1117/12.2284935
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
Abstract
Comprehensive using of Raman amplifier and bi-directional Er-doped fiber amplifier (EDFA), a long distance (72.3 km) Φ-OTDR system is demonstrated. In this system, a LD laser (~500mw) with wavelength from 1420 nm to 1470 nm is used as both EDFA pump power and Raman pump power. Meanwhile, difference value of upper-envelope and lower-envelope of Rayleigh scattering trace is calculated to test the sensitivity of the system, the intrusion with SNR of 3.99 dB、8.59 dB at two test points of sensing fiber is extracted.
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Xiaozhong Tian, Xiaozhong Tian, Yuan Yu, Yuan Yu, Meng Zhao, Meng Zhao, Guohui Jiang, Guohui Jiang, } "Long distance Φ-OTDR system based on Raman and EDFA synthetic amplification", Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 104640X (25 October 2017); doi: 10.1117/12.2284935; https://doi.org/10.1117/12.2284935
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