三阶双向RFA的Φ-OTDR传感距离分析仿真  

Analysis and simulation of Φ-OTDR sensing distance of third-order bidirectional RFA

作　　者：乔小瑞[1] 郑亮 舒畅[1] 王瑛剑[1] QIAO Xiaorui;ZHENG Liang;SHU Chang;WANG Yingjian(School of Electronic Engineering,Naval University of Engineering,Wuhan 430000,China;PLA 91954,Yongzhou Hunan 425000,China)

机构地区：[1]海军工程大学电子工程学院,武汉430033 [2]中国人民解放军91954部队,湖南永州425000

出　　处：《光通信技术》2020年第8期14-17,共4页Optical Communication Technology

摘　　要：喇曼光纤放大器(RFA)可有效地提高相位敏感光时域反射计(Φ-OTDR)系统的传感距离。为了进一步提高Φ-OTDR的系统传感距离,采用粒子群优化(PSO)算法对三阶双向RFA的泵浦光功率取值进行优化,计算了基于三阶双向RFA的Φ-OTDR系统理论最远传感距离,并设计了仿真实验。仿真分析结果表明:当探测脉冲宽度大于200 ns时,Φ-OTDR系统经三阶双向RFA放大传感距离可达到200 km以上。Raman fiber amplifier(RFA)can effectively improve the sensing distance of phase sensitive optical time domain reflectometer(Φ-OTDR)system.In order to further improve the system sensing distance ofΦ-OTDR,the particle swarm optimization(PSO)algorithm is used to optimize the pump optical power value of the third-order bidirectional RFA.The theoretical farthest sensing distance ofΦ-OTDR system based on third-order bidirectional RFA is calculated and a simulation experiment is designed.The simulation and analysis results show that when the detection pulse width is greater than 200 ns,theΦ-OTDR system can reach more than 200 km through the third-order bidirectional RFA amplification sensing distance.

关 键 词：分布式光纤传感 喇曼光纤放大器 传感距离 MATLAB仿真 

分 类 号：TN253[电子电信—物理电子学]