单频脉冲光纤放大器中的SBS效应实验研究  

Experimental study about effect of stimulated Brillouin scattering in single frequency pulsed fiber amplifiers

作　　者：何幸锴[1] 冯力天[1] 沈琪皓[1] 伍波[1] 兰戈[1] 周鼎富[1] 

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《激光技术》2012年第2期191-193,197,共4页Laser Technology

摘　　要：为了研究受激布里渊散射(SBS)效应对单频脉冲光纤激光放大器中脉冲波形的影响,搭建了单频脉冲光纤激光放大器系统。实验中观测到脉冲波形的畸变,继续提高功率,畸变处出现峰值功率极高的尖峰,分析认为,光纤中的二次受激布里渊散射导致了尖峰脉冲出现。为验证这一结论,构造包含二阶Stokes波的耦合方程组,进行了模拟仿真。结果表明,该峰值功率极高的尖峰正是SBS效应的二阶Stokes波。In order to study the stimulated Brillouin scattering （SBS） effect on the pulse form of pulsed fiber laser amplifiers, a single frequency fiber laser amplifier system was built and its pulse waveform distortion was observed in the experiment. If continuing to improve pump power, a high power spike appeared at the distorted location, which was induced by the second-order SBS effect in a fiber. To verify this conclusion, the coupled equations contains the second-order Stokes wave were built and simulated and the resuhs showed that the high peak power spike was the second-order Stokes wave of SBS effect.

关 键 词：激光技术 光纤激光放大器 受激布里渊散射 波形畸变 二阶Stokes波 

分 类 号：O437.2[机械工程—光学工程] TN722[理学—光学]