激光与光电子学进展, 2019, 56 (17): 170617, 网络出版: 2019-09-05
基于拉曼放大的长距离快速布里渊光时域反射仪 下载: 1000次
Fast and Long-Distance Brillouin Optical Time-Domain Reflectometry Based on Raman Amplification
光纤光学 布里渊光时域反射 布里渊散射 拉曼放大 fiber optics Brillouin optical time-domain reflection Brillouin scattering Raman amplification
摘要
基于宽带接收的快速布里渊光时域反射技术,通过结合分布式拉曼放大来实现长距离分布式布里渊传感。研究了拉曼放大前后系统的性能差别以及非线性现象,并探究拉曼抽运功率与脉冲功率的最佳组合方式。最终通过实验实现了空间分辨率为50 m、传感距离为100 km左右的快速温度传感,其中,在50 km处获得1.2 ℃的温度测量精度。系统传感距离较无拉曼放大时提高了约50 km,并且能够在10 s左右快速完成一次测量。
Abstract
Herein, using a fast Brillouin optical time-domain reflectometry system with a wideband receiver and distributed Raman amplification, a long-distance distributed Brillouin sensing is realized. We study the performance difference and nonlinear phenomena observed in the system before and after Raman amplification, and also jointly optimize the Raman pump and launched pulse powers. Our experiments achieve a sensing distance of around 100 km with a spatial resolution of 50 m and accuracy of 1.2 ℃ at a sensing position of 50 km. In comparison to the system without Raman amplification, the sensing distance is increased by approximately 50 km and measurement can be completed in approximately 10 s only.
马祥杰, 周黎明, 程凌浩, 刘伟民. 基于拉曼放大的长距离快速布里渊光时域反射仪[J]. 激光与光电子学进展, 2019, 56(17): 170617. Xiangjie Ma, Liming Zhou, Linghao Cheng, Weimin Liu. Fast and Long-Distance Brillouin Optical Time-Domain Reflectometry Based on Raman Amplification[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170617.