单模光纤中脉冲光的受激拉曼散射研究  

Study on Stimulated Raman Scattering of Pulse Laser in Single Mode Fiber

作　　者：王文亮[1] 冷进勇[1] 王蒙[1] 郭少锋[1] 姜宗福[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《光学学报》2013年第B12期145-148,共4页Acta Optica Sinica

摘　　要：高峰值功率的脉冲光纤激光在长距离输出时容易激发受激拉曼散射（SRS）效应。搭建了主振荡功率放大（MOPA）结构的调Q光纤激光器，研究不同工作状态时的输出激光功率、光谱以及脉冲宽度；实验研究了脉冲光在2 km单模光纤中传输时的受激拉曼散射效应，分析了其拉曼散射光谱特性及各级斯托克斯光波的时域特性。实验结果表明：脉冲光在长距离传输时易出现多级受激拉曼散射光，各级斯托克斯光间的频移基本相等，其与入射脉冲的中心波长无关，与光纤本身的材料及掺杂成分有关，且各级拉曼散射光与抽运光在传输中是同步的。高斯形脉冲经受激拉曼散射后，剩余脉冲的形状呈中间凹陷。The stimulated Raman scattering （SRS） is easy to be excited in the propagation of a pulse laser with high peak power. A master oscillator power amplifier （MOPA） Q-switched fiber laser is built. The output power, spectrum and pulse width of it are studied. The characteristics of SRS in 2 km single mode fiber are experimentally studied, such as spectrum and time-domain characteristics of Stokes light. The results show that the high peak power pulse in long distance transmission is susceptible to be scattered into multiple order Raman light. Frequency shifts of different Stokes light are basically equal. It has nothing to do with the center wavelength of the incident pulse, but it is associated with the material and the doping component of the fiber. Raman scattering light and the pump light in transmission are synchronous. After Gaussian pulse has stimulated Raman scattering, the shape of the residual pump pulse is center hollow.

关 键 词：激光器 调Q光纤激光 受激拉曼散射 主振荡功率放大 

分 类 号：TN248.1[电子电信—物理电子学]