二次谐波腔内增强连续光泵浦光参量啁啾脉冲饱和放大

项目名称： 二次谐波腔内增强连续光泵浦光参量啁啾脉冲饱和放大

项目编号： No.60878017

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 轻工业、手工业

项目作者： 徐世祥

作者单位： 深圳大学

项目金额： 42万元

中文摘要： 本项目提出发展一种二次谐波腔内增强的连续光泵浦啁啾脉冲光参量饱和放大技术。该技术利用内腔增强的连续光作为光参量啁啾脉冲放大（OPCPA）系统的泵浦源，达到改善泵浦功率稳定性，简化系统时间同步装置以及提高参量放大效率和稳定性的目的。研究结果表明利用内腔增强的连续光泵浦OPCPA系统主要的技术障碍是连续激光照射条件下参量放大晶体和晶体表面光学膜的抗激光损伤阈值。就目前晶体本身制作水平及其表面增透膜的抗激光损伤能力而言，用连续光泵浦光参量放大是行不通的。围绕OPCPA，本项目还研究了新型色散补偿棱镜对、常用光参量放大晶体光折变效应、利用线偏振态啁啾技术提高光参量啁啾脉冲放大的带宽和效率、超短激光脉冲二次谐波腔内增强效应、新型宽带脉冲波片设计、基于旋光色散效应的钛宝石宽带激光放大整形技术以及各向异性光学材料负折射/负反射和全方位常数透过效应等。相关研究成果发表论文11篇（SCI收录7篇，EI收录4篇）。项目期间活授权发明专利7项，另2项处实审阶段。

中文关键词： 光参量啁啾脉冲放大；超短脉冲激光；超快非线性光学

英文摘要： This project aims to develop a novel way to realize optical parametric chirped pulse amplication (OPCPA) pumped by a CW intracavity enhanced second harmonic for the purposes of improving the stabilities of the pumping and the amplifications and simplifing the system without need of any setup for the temporal synchronies between the pumping and the signals beams. Unfortunately, our investigations show the available intensity of the CW intracavity enhanced second harmonic is limited fatally the low laser induced throsheld of the nonlinear crystals, as well as the optical coating on their surfaces thus it is hard to implement our design experimentally basing on existent manufacturing levels of nonlinear crystals and optical coatings. Other research work include the novel designs of some prism pairs for pulse compression, the photorefractive effects of some nonlinear optical parametric crystals pumped by strong ultrashort laser pulses, improvements of the efficiency and bandwidth of OPCPA by linear-polarization-chirped pulses, high efficiency intracavity second-harmonic enhancement for few-cycle laser pulse train, development of flat broadband birefringent retardation for zero-order wave plates, pulse amplification and shaping basing on optical rotatory dispersion, Negative reflection/refraction and omnidirectional constant transmission between two isotropic media, and so on. Some of our achievements are presented by 7 SCI/ 4 EIcited papers, and 7 authorized invention patents. Other 2 invention patents are under examination.

英文关键词： Optical parametric chirped pulse amplication;ultrashort pulse laser;ultrafast nonlinear optics