基于双向拉曼放大的相位敏感光时域反射仪  

Phase-sensitive optical time-domain reflectometer based on bi-directional Raman amplification

作　　者：王杰[1] 贾新鸿[1] 饶云江[1] 吴慧娟[1] 

机构地区：[1]电子科技大学通信与信息工程学院,光纤传感与通信教育部重点实验室,成都611731

出　　处：《物理学报》2013年第4期216-220,共5页Acta Physica Sinica

摘　　要：报道了一种基于双向拉曼放大延长相位敏感光时域反射仪分布式光纤传感系统传感距离的方法.利用双向拉曼抽运对信号光进行拉曼放大,补偿了光纤传输损耗.实验表明,该方法提高了整个传感光纤上信号光的分布均匀性,实现了74km的超长传感距离和20m的空间分辨率,同时,试验了不同信号光入纤功率和抽运功率对基于双向拉曼放大的相位敏感光时域反射仪系统的影响.In this paper, we report on a distributed sensing system of phase-sensitive optical time-domain reflectometer （qb-OTDR） based on bi-directional Raman amplification. With the bi-directional Raman amplification, the transmission loss of the optical fiber can be compensated efficiently. The experimental characterization of evenly detected signals along the whole sensing distance of 74 km with 20 m spatial resolution is successfully demonstrated, resulting in the longest distributed sensing system based phase-sensitive optical time-domain reflectometer reported so far, to the best of our knowledge. The influences of different incident powers and pump powers on qb-OTDR are studied experimentally.

关 键 词：相位敏感光时域反射仪 分布式光纤传感 拉曼放大 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]