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用于钕玻璃啁啾脉冲放大系统光谱整形的多层介质膜反射镜
引用本文:Li Ming,张彬,Dai Ya-Ping,王韬,Fan Zheng-Xiu,黄伟.用于钕玻璃啁啾脉冲放大系统光谱整形的多层介质膜反射镜[J].物理学报,2008,57(8):4898-4903.
作者姓名:Li Ming  张彬  Dai Ya-Ping  王韬  Fan Zheng-Xiu  黄伟
作者单位:(1)上海激光等离子体研究所,上海 201800; (2)四川大学电子信息学院,成都 610064; (3)四川大学电子信息学院,成都 610064;上海激光等离子体研究所,上海 201800; (4)中国科学院光电技术研究所,成都 610209; (5)中国科学院上海光学精密机械研究所,上海 201800
基金项目:四川省青年科技基金(批准号:05ZQ026-013)和教育部新世纪优秀人才支持计划(批准号:NCET-05-0784)资助的课题.
摘    要:在千焦拍瓦高功率啁啾脉冲放大系统设计中,为了尽量消除增益窄化和增益饱和效应的影响,同时尽可能提高高功率激光输出脉冲信噪比参数,激光脉冲时空和光谱的整形问题备受关注.提出一种光谱整形新方法,利用特定结构的多层介质膜反射镜,可实现对大能量高功率啁啾脉冲钕玻璃放大系统中啁啾脉冲的光谱整形.研究结果表明,只要合理选择多层介质膜系的结构参数,可有效地控制其反射率分布,且在保证反射相位基本不变的条件下其调制度可超过60%.针对钕玻璃1053nm波长设计而成的光谱整形反射镜,反射带宽可达到196nm,色分辨率约为0.1 关键词: 介质反射膜 光谱整形 千焦拍瓦 啁啾脉冲

关 键 词:介质反射膜  光谱整形  千焦拍瓦  啁啾脉冲
收稿时间:2007-11-10
修稿时间:3/4/2008 12:00:00 AM

Multilayer dielectric thin film reflector for spectrum reshaping of chirped pulse laser in Nd:glass chirped pulse amplification system
Li Ming,Zhang Bin,Dai Ya-Ping,Wang Tao,Fan Zheng-Xiu,Huang Wei.Multilayer dielectric thin film reflector for spectrum reshaping of chirped pulse laser in Nd:glass chirped pulse amplification system[J].Acta Physica Sinica,2008,57(8):4898-4903.
Authors:Li Ming  Zhang Bin  Dai Ya-Ping  Wang Tao  Fan Zheng-Xiu  Huang Wei
Abstract:In order to compensate for the gain narrowing and gain saturation effects, and also to improve the signal to noise ratio of the output high-power laser pulse, lots of attention have been paid to the spatial distribution, the temporal profile, as well as the spectrum reshaping in the design of kilo-joule peta-watt chirped pulse amplification (CPA) systems. In this paper, a new method for the spectrum reshaping is proposed, which utilizes a multilayer dielectric thin film reflector with specific construction to realize the spectrum reshaping of the chirped pulse laser in large energy and high power Nd:glass CPA system. The results show that the reflectivity distribution of the multilayer dielectric film reflector can be controlled effectively only if the parameters of the thin film reflector are chosen appropriately. The spectrum modulation radio can be varied over 60% under the condition that the phase of the reflecting light remains nearly constant. The thin film reflector designed for spectrum reshaping of the Nd:glass CPA system with the central wavelength of 1053nm exhibits a bandwidth of reflect light of 196nm, the chromatic resolving capability of about 0.1nm and the phase aberration in the range of the tens of nanometer of up to 12mrad, which can meet the requirement of the “Senguang-Ⅱ” kilo-joule peta-watt reconstruction project.
Keywords:multilayer dielectric film  spectrum reshaping  kilo-joule peta-watt  chirped pulse
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