Spatial chirp in Ti:sapphire multipass amplifier

doi:10.1088/1674-1056/26/3/034206

中国物理B ›› 2017, Vol. 26 ›› Issue (3): 34206-034206.doi: 10.1088/1674-1056/26/3/034206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Spatial chirp in Ti:sapphire multipass amplifier

Wenkai Li(黎文开), Jun Lu(陆俊), Yanyan Li(李妍妍), Xiaoyang Guo(郭晓杨), Fenxiang Wu(吴分翔), Linpeng Yu(於林鹏), Pengfei Wang(王朋飞), Yi Xu(许毅), Yuxin Leng(冷雨欣)

1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan

收稿日期:2016-11-07 修回日期:2016-12-09 出版日期:2017-03-05 发布日期:2017-03-05
通讯作者: Yi Xu, Yuxin Leng E-mail:xuyi@.siom.ac.cn;lengyuxin@mail.siom.ac.cn
基金资助:
Project supported by 100 Talents Program of Chinese Academy of Sciences, the National Natural Science Foundation of China (Grant Nos. 61475169, 61521093, and 11127901), and the Youth Innovation Promotion Association of Chinese Academy of Sciences.

Spatial chirp in Ti:sapphire multipass amplifier

Wenkai Li(黎文开)^1,2, Jun Lu(陆俊)^1,2, Yanyan Li(李妍妍)¹, Xiaoyang Guo(郭晓杨)^1,3, Fenxiang Wu(吴分翔)^1,2, Linpeng Yu(於林鹏)^1,2, Pengfei Wang(王朋飞)^1,2, Yi Xu(许毅)¹, Yuxin Leng(冷雨欣)¹

1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan

Received:2016-11-07 Revised:2016-12-09 Online:2017-03-05 Published:2017-03-05
Contact: Yi Xu, Yuxin Leng E-mail:xuyi@.siom.ac.cn;lengyuxin@mail.siom.ac.cn
Supported by:
Project supported by 100 Talents Program of Chinese Academy of Sciences, the National Natural Science Foundation of China (Grant Nos. 61475169, 61521093, and 11127901), and the Youth Innovation Promotion Association of Chinese Academy of Sciences.

摘要/Abstract

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.

关键词: spatial chirp, multipass amplifier, Ti:sapphire

Abstract: 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.

Key words: spatial chirp, multipass amplifier, Ti:sapphire

中图分类号: (Beam characteristics: profile, intensity, and power; spatial pattern formation)

42.60.Jf

79.20.Ds (Laser-beam impact phenomena) 42.55.Rz (Doped-insulator lasers and other solid state lasers)

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. Spatial chirp in Ti:sapphire multipass amplifier[J]. 中国物理B, 2017, 26(3): 34206-034206.

Wenkai Li(黎文开), Jun Lu(陆俊), Yanyan Li(李妍妍), Xiaoyang Guo(郭晓杨), Fenxiang Wu(吴分翔), Linpeng Yu(於林鹏), Pengfei Wang(王朋飞), Yi Xu(许毅), Yuxin Leng(冷雨欣). Spatial chirp in Ti:sapphire multipass amplifier[J]. Chin. Phys. B, 2017, 26(3): 34206-034206.

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Spatial chirp in Ti:sapphire multipass amplifier

Spatial chirp in Ti:sapphire multipass amplifier

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