皮秒光纤-固体混合放大紫外激光器  

Ultra-violet picosecond fiber-solid hybrid amplification laser

作　　者：苏鑫 姚吉 王禹凝 杨祥辉 郑权 SU Xin;YAO Ji;WANG Yu-ning;YANG Xiang-hui;ZHENG Quan(Changchun New Industries Optoelectronics Technology Co., Ltd, Changchun 130103, China;University of Chinese Academy of Sciences, Beijing 100049, China;Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China)

机构地区：[1]长春新产业光电技术有限公司,吉林长春130103 [2]中国科学院大学,北京100049 [3]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2020年第10期2122-2128,共7页Optics and Precision Engineering

基　　金：吉林省科技发展计划资助项目(No.20170203013GX)。

摘　　要：脉冲宽度为皮秒级的紫外激光,拥有极窄的脉冲宽度,可在短时间内破坏物质的分子键,缩短了与物质相互作用的时间,同时具有较强的时间分辨率。为了获得皮秒级脉冲宽度的短波紫外激光,本文设计了一种皮秒光纤-固体混合放大213 nm激光器。采用重复频率为5 MHz、脉冲宽度为52 ps、平均功率为2.5 W的1064 nm光纤激光器作为种子源,经过两级端面泵浦的Nd∶YVO4晶体组成的放大器对种子光进行放大,得到了平均功率为10.5 W的1064 nm基频光输出。再将混合放大后得到的基频光及其四倍频后获得的266 nm激光在BBO晶体内进行和频,最终输出213 nm紫外激光。混合放大后获得的基频光经过多级非线性转换,最终输出脉冲宽度为690 ps、平均功率为61 mW的213 nm紫外激光,非线性转换效率达到0.58%。Ultraviolet lasers with picosecond pulse widths can quickly break the molecular bonds of materials,reducing interaction time.At the same time,they have high temporal resolution.In order to obtain an ultraviolet laser with a picosecond pulse width,a solid fiber,hybrid-amplified 213 nm laser was designed.First,a 1064 nm fiber laser with a repetition rate of 5 MHz,pulse width of 52 ps,and average power of 2.5 W was used as a seed source.After two stages of end pumped Nd∶YVO4 crystal amplification,a 1064 nm laser with an average power of 10.5 W was obtained.This 1064 nm laser and a 266 nm laser were then combined in a BBO crystal to produce a 213 nm UV laser.The final output is a 213 nm UV laser with a pulse width of 690 ps and an average power of 61 mW.The nonlinear conversion efficiency is 0.58%.

关 键 词：紫外激光 皮秒激光器 混合放大技术 五倍频技术 

分 类 号：TN248[电子电信—物理电子学]