Author Affiliations
Abstract
1 Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
2 HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
3 Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
The strong-coupling mode, called the “quasimode”, is excited by stimulated Brillouin scattering (SBS) in high-intensity laser–plasma interactions. Also SBS of the quasimode competes with SBS of the fast mode (or slow mode) in multi-ion species plasmas, thus leading to a low-frequency burst behavior of SBS reflectivity. Competition between the quasimode and the ion-acoustic wave (IAW) is an important saturation mechanism of SBS in high-intensity laser–plasma interactions. These results give a clear explanation of the low-frequency periodic burst behavior of SBS and should be considered as a saturation mechanism of SBS in high-intensity laser–plasma interactions.
Brillouin amplification inertial confinement fusion ion-acoustic waves quasimode stimulated Brillouin scattering High Power Laser Science and Engineering
2019, 7(4): 04000e58
1 贵州大学理学院 贵州省光电子技术与应用重点实验室, 贵州 贵阳550025
2 天津大学 电子信息工程学院光纤通信实验室 光电信息技术科学教育部重点实验室, 天津300072
概述了光纤中受激布里渊散射(SBS)作用于微波光子信号的工作原理,基本特性以及工作方式。从受激布里渊散射增益谱的角度对微波光子信号的选择放大、倍频、上变频和信号产生以及从损耗谱的角度对信号载波抑制和信号相移等典型应用和研究进展进行了介绍。总结了在这些应用中受激布里渊散射的优势和缺陷,以及可能的应对方案。
光通信 受激布里渊散射 微波光子信号 布里渊放大
哈尔滨工业大学光电子技术研究所,黑龙江 哈尔滨 150001
研究了受激布里渊散射(SBS)放大池中,通过改变抽运光与Stokes种子光脉冲的延时,改变它们在池中的相遇位置,实现抽运光对陡前沿种子光脉冲不同部位的选择性放大,从而修正Stokes脉冲波形。理论和实验研究了Stokes光脉宽、脉冲波形前后沿时长比以及能量提取效率等参数随相遇时间的变化规律,在相遇时间2.5 ns时,理论得到前后沿时长比为1,能量提取效率80%以上的Stokes放大光脉冲波形,理论和实验符合较好。
光电子学 脉冲修正 布里渊放大 相遇时间
