Diffraction of white-light supercontinuum by femtosecond laser-induced transient grating in carbon bisulfide  

作　　者：黄丽 杨延强 王英惠 郑植仁 苏文辉 

机构地区：[1]Centre for Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology

出　　处：《Chinese Physics B》2010年第10期309-313,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 20973050 and 10904023)

摘　　要：Experiments on fs laser-induced transient grating （LITG） in carbon bisulfide （CS2） are carried out to explore the chirp characteristics of a white-light supercontinuum （SC） generated by a 800-nm, 160-fs laser pulse in a 4-mm thick Al2O3 crystal. Two orders of diffraction signals of SC by fs LITG in CS2 are observed, demonstrating that both the third-order process and the fifth-order process are present simultaneously. The experimental results also imply that the formation of an fs transient refractive-index grating in CS2 is mainly due to the electronic polarization process.Experiments on fs laser-induced transient grating （LITG） in carbon bisulfide （CS2） are carried out to explore the chirp characteristics of a white-light supercontinuum （SC） generated by a 800-nm, 160-fs laser pulse in a 4-mm thick Al2O3 crystal. Two orders of diffraction signals of SC by fs LITG in CS2 are observed, demonstrating that both the third-order process and the fifth-order process are present simultaneously. The experimental results also imply that the formation of an fs transient refractive-index grating in CS2 is mainly due to the electronic polarization process.

关 键 词：laser-induced transient grating white-light supercontinuum chirp characteristic 

分 类 号：O437[机械工程—光学工程]