摘要
为解决高重复频率泵浦下受激布里渊散射(stimulated Brillouin scattering,SBS)脉冲串扰对重复频率提升的限制,本文基于SBS耦合波方程,构建了延迟脉冲泵浦数值计算模型,探究了不同延时对前脉冲Stokes波形的影响。在HS-260介质中,前脉冲SBS保持独立的最小延迟时间为8 ns;当延迟时间小于8 ns时,前脉冲Stokes波会发生尾部调制。研究验证了不同介质的最小延迟时间与其声子寿命呈正相关。针对串扰问题,本文提出选用声子寿命较短的介质来减少最小延迟时间,为提升SBS脉冲压缩的重复频率提供了理论支撑。
To address the limitation of repetition-rate scaling in stimulated Brillouin scattering(SBS)caused by pulse interference under high-repetition-rate pumping,this work develops a numerical model of delayed-pulse pumping based on the SBS coupled-wave equations and investigates the influence of different delays on the waveform of the leading Stokes pulse.In the HS-260 medium,the minimum delay required to maintain the independence of the leading Stokes pulse is found to be 8 ns;when the delay is shorter than 8 ns,the leading Stokes pulse exhibits trailing-edge modulation.The study further confirms a positive correlation between the minimum delay time and the phonon lifetime in different media.To mitigate interference,we propose employing media with shorter phonon lifetimes to reduce the minimum delay requirement.These results provide theoretical support for enhancing the repetition rate of SBS pulse compression.
作者
李文杰
陈义夫
谭博文
王坤
王雨雷
白振旭
LI Wenjie;CHEN Yifu;TAN Bowen;WANG Kun;WANG Yulei;BAI Zhenxu(School of Electronics and Information Engineering,Hebei University of Technology,Tianjin 300401,China;Hebei Key Laboratory of Advanced Laser Technology and Equipment,Tianjin 300401,China;School of Energy Environmental Engi-neering,Hebei University of Technolohy,Tianjin 300401,China)
出处
《河北工业大学学报》
2025年第6期36-43,共8页
Journal of Hebei University of Technology
基金
国家自然科学基金资助项目(61927815,62375076)
河北省自然科学基金资助项目(F2023202063)
天津市自然科学基金资助项目(22JCYBJC01100)
河北省高等学校科学研究项目(JCZX2025003)
石家庄市科技合作专项项目(SJZZXC24006)。
关键词
受激布里渊散射
脉宽压缩
声子寿命
脉冲串扰
仿真
stimulated Brillouin scattering
pulse compression
phonon lifetime
pulse interference
simulation
