光通信技术, 2020, 44 (8): 14, 网络出版: 2020-10-27
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
分布式光纤传感 喇曼光纤放大器 传感距离 Matlab仿真 distributed fiber optic sensing Raman fiber amplifier sensing distance Matlab simulation
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。
Abstract
Raman fiber amplifier (RFA) can effectively improve the sensing distance of phase sensitive optical time domain refl-ectometer(Φ-OTDR) system. In order to further improve the system sensing distance of Φ-OTDR, the particle swarm optimiza-tion(PSO) algorithm is used to optimize the pump optical power value of the third-order bidirectional RFA. The theoretical farth-est sensing distance of Φ-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, the Φ-OTDR system can reach more than 200 km through the third-order bidirectional RFA amplification sensing distance.
乔小瑞, 郑亮, 舒畅, 王瑛剑. 三阶双向RFA的Φ-OTDR传感距离分析仿真[J]. 光通信技术, 2020, 44(8): 14. QIAO Xiaorui, ZHENG Liang, SHU Chang, WANG Yingjian. Analysis and simulation of Φ - OTDR sensing distance of third-order bidirectional RFA[J]. Optical Communication Technology, 2020, 44(8): 14.