宽带低相干光三倍频研究进展
Progress in Third-Harmonic Generation of Broadband Low-Coherence Light
周少锋 1赵晓晖 1刘栋 1季来林 1饶大幸 1冯伟 1贺瑞敬 1尹立 1龙思琪 1高妍琦1
作者信息
- 1. 中国工程物理研究院上海激光等离子体研究所,上海 201800
- 折叠
摘要
宽带低相干光有望解决惯性约束聚变中的激光与等离子体相互作用不稳定性问题,但高效的宽带低相干光三倍频是其走向工程应用的技术瓶颈之一.目前,对于宽带低相干光三倍频过程的研究较少,基于已有认识,介绍了宽带低相干光的特性及其频率转换过程中的倍频与和频模型,指出了宽带低相干光难以高效三倍频的根本原因,并综述了各种宽带三倍频方案的发展历史、原理和局限性.为了给低相干光频率转换实验提供一定参考,对比了常用的非线性频率转换晶体的接收线宽和非线性系数.最后,对高效宽带低相干三倍频可能的突破方向提出了一些建议.
Abstract
Broadband low-coherence light is expected to overcome the laser-plasma instability in inertial confinement fusion.However,achieving an efficient third-harmonic generation of broadband low-coherence light remains a significant technical problem in engineering applications.Currently,limited research has been done on the third-harmonic generation of broadband low-coherence light.In this study,the characteristics of the broadband low-coherence light are introduced,along with the frequency conversion processes involving second-harmonic and sum frequency generation.Subsequently,the fundamental challenges for an efficient third-harmonic generation with broadband low-coherence light are presented and an overview of the developmental history,principles,and limitations of various broadband third-harmonic generation schemes is provided.In experiments on the frequency conversion of low-coherence light,the acceptance bandwidth and nonlinear coefficients of commonly used nonlinear frequency-conversion crystals are compared for reference.Finally,some suggestions for potential breakthrough directions are proposed for an efficient third-harmonic generation of broadband low-coherence light.
关键词
惯性约束聚变/宽带低相干光/频率转换/三倍频Key words
inertial confinement fusion/broadband low-coherence light/frequency conversion/third-harmonic generation引用本文复制引用
出版年
2024
NETL
NSTL
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