Effect of spatio-temporal coupling on ultrafast laser direct writing in glass  

作　　者：Qin Li Wenbo Li Wei Chu Yuxiang Cao Wencheng Zhang Hongliang Ma Zuanming Jin Ye Dai 李沁;李文博;储蔚;曹宇祥;张文成;马洪良;金钻明;戴晔(Department of Physics, Shanghai University, Shanghai 200444, China;State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China)

机构地区：[1]Department of Physics, Shanghai University, Shanghai 200444, China [2]State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

出　　处：《Chinese Optics Letters》2019年第8期42-46,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Nos.11774220,11604202,and 61735010)

摘　　要：Spatio-temporal coupling characteristics of ultrafast laser pulses are quantitatively tailored. An asymmetric microstructure is induced in the focal volume when the laser scans perpendicularly to the direction of the spatial chirp in fused silica. The tilted direction reverses when adding a Dove prism into the light path. The sign of the pulse front tilt can be turned from positive to negative by changing the group delay dispersion by steps. We reveal that the tilted direction of a microstructure depends on spatial chirp, and the interplay between spatiotemporal chirp leads to the change of tilted angles.Spatio-temporal coupling characteristics of ultrafast laser pulses are quantitatively tailored. An asymmetric microstructure is induced in the focal volume when the laser scans perpendicularly to the direction of the spatial chirp in fused silica. The tilted direction reverses when adding a Dove prism into the light path. The sign of the pulse front tilt can be turned from positive to negative by changing the group delay dispersion by steps. We reveal that the tilted direction of a microstructure depends on spatial chirp, and the interplay between spatiotemporal chirp leads to the change of tilted angles.

关 键 词：characteristics PULSES ANGLES 

分 类 号：O4[理学—物理]