Nonlinear compression of picosecond chirped pulse from thin-disk amplifier system through a gas-filled hollow-core fiber  

作　　者：陆俊 黄志远 王丁 许毅 刘彦祺 郭晓杨 黎文开 吴分翔 刘征征 冷雨欣 

机构地区：[1]School of Physics Science and Engineering, Tongji University, Shanghai 200092, China [2]State Key Laboratory of High Field Laser Physics, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [3]University of Chinese Academy of Sciences, Beijing 100049, China [4]Department of Physics, Shanghai University, Shanghai 200444, China

出　　处：《Chinese Physics B》2016年第12期277-282,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2011CB808101);the Funds from the Chinese Academy of Sciences,and the National Natural Science Foundation of China(Grant Nos.11127901,10734080,61221064,60908008,and 61078037)

摘　　要：We theoretically study the nonlinear compression of a 20-rnJ, 1030-nm picosecond chirped pulse from the thin-disk amplifier in a krypton gas-filled hollow-core fiber. The chirp from the thin-disk amplifier system has little influence on the initial pulse, however, it shows an effect on the nonlinear compression in hollow-core fiber. We use a large diameter hollow waveguide to restrict undesirable nonlinear effects such as ionization; on the other hand, we employ suitable gas pressure and fiber length to promise enough spectral broadening; with 600-μm, 6-bar （1 bar = 105 Pa）, 1.8-m hollow fiber, we obtain 31.5-fs pulse. Moreover, we calculate and discuss the optimal fiber lengths and gas pressures with different initial durations induced by different grating compression angles for reaching a given bandwidth. These results are meaningful for a compression scheme from picoseconds to femtoseconds.We theoretically study the nonlinear compression of a 20-rnJ, 1030-nm picosecond chirped pulse from the thin-disk amplifier in a krypton gas-filled hollow-core fiber. The chirp from the thin-disk amplifier system has little influence on the initial pulse, however, it shows an effect on the nonlinear compression in hollow-core fiber. We use a large diameter hollow waveguide to restrict undesirable nonlinear effects such as ionization; on the other hand, we employ suitable gas pressure and fiber length to promise enough spectral broadening; with 600-μm, 6-bar （1 bar = 105 Pa）, 1.8-m hollow fiber, we obtain 31.5-fs pulse. Moreover, we calculate and discuss the optimal fiber lengths and gas pressures with different initial durations induced by different grating compression angles for reaching a given bandwidth. These results are meaningful for a compression scheme from picoseconds to femtoseconds.

关 键 词：picosecond pulse hollow-core fiber thin-disk amplifier spectrum broadening 

分 类 号：TN722[电子电信—电路与系统] TN253