High-efficiency, ultra-broadband ns-OPCPA with high temporal contrast based on dual-crystal scheme

被引：6

作者：

Chen, Haidong ^{[1
,2
,3
]}

Wang, Xinliang ^{[1
,2
]}

Liu, Xingyan ^{[1
,2
]}

Long, Yingbin ^{[1
,2
]}

Li, Wenkai ^{[1
,2
]}

Chen, Xun ^{[1
,2
,3
]}

Bai, Peile ^{[1
,2
,3
]}

Hu, Jiabing ^{[1
,2
]}

Wu, Fenxiang ^{[1
,2
]}

Zhang, Zongxin ^{[1
,2
]}

Liu, Yanqi ^{[1
,2
]}

Xu, Yi ^{[1
,2
]}

Leng, Yuxin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, CAS Ctr Excellence Ultraintense Laser Sci, Shanghai 201800, Peoples R China

[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2023年 / 129卷 / 04期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

CHIRPED-PULSE AMPLIFICATION; OPTICAL PARAMETRIC-AMPLIFIER; PERFORMANCE; GENERATION; POWER;

D O I：

10.1007/s00340-023-08000-3

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we report a nonlinear optical parametric amplifier featuring high conversion efficiency, high temporal contrast and ultra-broadband spectrum simultaneously, based on the dual-crystal scheme. By removing the idler pulse between two crystals and optimizing the phase-matching geometry, the effective conversion efficiency can be enhanced to similar to 40%, and the spectral bandwidth of the amplified pulse can reach 210 nm. Moreover, the degradation of temporal contrast due to the backconversion in dual-crystal scheme is avoided by optimizing two crystals' thickness. The measured contrast ratio is 10(-10), which is almost the same as that of the single-crystal scheme. The energy stability and the beam profile in both dual crystal and single-crystal scheme are also compared. This work can provide very meaningful guideline for the design of high-peak-power OPCPA.

引用

页数：7

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