外文题目: Spatial chirp in Ti:sapphire multipass amplifier
作者: 黎文开; 陆俊; 李妍妍; 郭晓杨; 吴分翔; 於林鹏; 王朋飞; 许毅; 冷雨欣
刊名: Chin. Phys. B
年: 2017 卷: 26 期: 3 文章编号：34206
英文关键词:
spatial chirp; multipass amplifier; Ti:sapphire
PULSE AMPLIFICATION; FEMTOSECOND LASER; GENERATION; PETAWATT; DESIGN; SYSTEM; FS
英文摘要:
The spatial chirp generated in the Ti:sapphire multipass amplifier is numerically investigated based on the one-dimensional (1D) and two-dimensional (2D) Frantz-Nodvik equations. The simulation indicates that the spatial chirp is induced by the spatially inhomogeneous gain, and it can be almost eliminated by utilization of proper beam profiles and spot sizes of the signal and pump pulses, for example, the pump pulse has a top-hatted beam profile and the signal pulse has a super-Gaussian beam profile with a relatively larger spot size. In this way, a clear understanding of spatial chirp mechanisms in the Ti: sapphire multipass amplifier is proposed, therefore we can effectively almost eliminate the spatial chirp and improve the beam quality of a high-power Ti: sapphire chirped pulse amplifier system.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1088/1674-1056/26/3/034206


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