上海深紫外自由电子激光装置(SDUV-FEL)种子激光传输与注入系统  

Seed laser transmission and injection system for the Shanghai Deep-Ultraviolet Free-Electron Laser test facility

作　　者：王兴涛[1] 兰太和[1] 刘波[1] 沈磊[1] 冯冽[1] 姚海凤[1] 张文艳[1] 王东[1] 

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800

出　　处：《核技术》2013年第5期11-15,共5页Nuclear Techniques

基　　金：国家自然科学基金项目(11175241)资助

摘　　要：自由电子激光新发展的高增益工作模式(HG;HG,EEHG)具有独特的优势,但需要外种子激光与电子束团相互作用,为满足实验的要求,我们在上海深紫外自由电子激光装置(SDUV-FEL)上建立了新的种子激光传输注入与测量系统,实现了种子激光的有效注入。通过采用光参量放大器(OPA),使得注入激光工作波长大范围可调;通过高精度的光学调节与测量装置,实现种子激光与电子束团的精确同步,精度达到亚皮秒量级,测量结果显示激光对电子束团进行了有效的调制。通过以上技术,在上海深紫外自由电子激光装置(SDUV-FEL)上成功完成了HGHG与EEHG的相关实验。Background： Free electron laser （FEL） has developed several high gain work modes, including high gain harmonic generation （HGHG）, echo-enabled harmonic generation （EEHG）, cascade HGHG, etc. Such modes have special advantages but all need external seed laser to modulate the electron beam. Purpose： To carry out such experiments at Shanghai Deep-Ultraviolet Free Electron Laser test facility （SDUV-FEL）, a new seed laser system has been established. Methods： The system is consisting of Ti： sapphire laser, optic parameter amplifier （OPA）, laser transport line and synchronize measurement system. Results： By such system, wide variation rang of seed laser wavelength （1140-2600 nm） and sub-picosecond level synchronization between seed laser and electron beam have been achieved. Conclusions： We have succeeded carry out HGHG and EEHG experiments at SDUV-FEL and the results show that the seed laser could effectively modulate electron beam.

关 键 词：自由电子激光 种子激光 传输 注入 调制 

分 类 号：TL503.3[核科学技术—核技术及应用]