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摘要

采用平凹多通腔和固体薄片组的非线性脉冲光谱展宽与压缩方案开展了100 W皮秒激光非线性脉冲压缩的研究. 以多片熔融石英薄片作为非线性介质, 在平凹腔中皮秒激光通过自相位调制将光谱宽度由0.24 nm展宽至4.8 nm, 用光栅对进行色散补偿压缩, 实现压缩后的脉冲宽度为483 fs, 对应压缩比为22, 最终输出飞秒激光的平均功率为44.2 W. 相对于常规多通腔方案, 该平凹腔结构紧凑, 光路稳定性好, 压缩比高, 非常有利于非线性光谱展宽与压缩的实现.

关键词:

Abstract

Ultrafast femtosecond laser system with hundreds of microjoules of energy, operating at a repetition frequency of several kilohertz, has very important applications in many fields such as medicine, mid-infrared laser generation, industrial processing, and vibrational spectroscopy. The chirped pulse amplification technique provides a feasible path to obtain light sources with those parameters. However, the use of chirped pulse amplification increases the technical complexity and cost of the laser system. Recently, the proposal of a multi-pass cell (MPC) nonlinear pulse compression technique has enabled us to obtain high power ultrafast femtosecond pulses with reduced technical complexity and cost. The device requires only two concave mirrors and a nonlinear medium in between. In the past seven years, the multi-pass cell nonlinear pulse compression technique has made great progress, making it possible to obtain ultrashort pulses with average power of more than a few kW and peak power of tens to hundreds of TW. In this work, we achieve nonlinear pulse compression of a 100-W picosecond laser by using an improved nonlinear pulse compression scheme that combines a hybrid of a plano-cancave multi-pass cell and multi-thin-plate. Using fused silica plates in plano-cancave cavity, the spectral bandwidth (FWHM) of input picosecond laser is broadened from 0.24 nm to 4.8 nm due to self-phase modulation effect, the pulse is compressed to 483 fs by dispersion compensation using grating pairs, which corresponds to a compression factor of 22, and the final output power of 44.2 W is obtained. Compared with traditional MPC, the plano-cancave cavity scheme we developed is a very promising solution for nonlinear compression due to its compactness, more stability and large compression ratio.

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作者及机构信息

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通信作者:滕浩,hteng@iphy.ac.cn; 朱江峰,jfzhu@xidian.edu.cn;

基金项目:国家重点研发计划(批准号: 2022YFA1604200)和国家自然科学基金(批准号: 12034020)资助的课题.

Authors and contacts

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Corresponding author:Teng Hao,hteng@iphy.ac.cn; Zhu Jiang-Feng,jfzhu@xidian.edu.cn;

Funds:Project supported by the National Key R&D Program of China (Grant No. 2022YFA1604200) and the National Natural Science Foundation of China (Grant No. 12034020).

文章全文: translate this paragraph

参考文献

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施引文献

下载: 全尺寸图片幻灯片

输入功率/W	输入脉宽/fs	重复频率/MHz	输出功率/W	输出脉宽/fs	压缩比	介质	文献
416	850	10	375	170	5	FS	[28]
95	230	18.5	84	35	6	FS	[31]
34	300	0.2	30	31	10	FS	[32]
112	1240	1	65	39	31	FS	[33]
1.6	12500	0.008	1.23	601	20	FS	[34]
24	275	0.15	24	33	8	Ar	[35]
320	730	0.1	250	56	13	Ar	[36]
550	590	0.5	530	30	19	Ar	[37]
8.6	1200	0.001	7.9	44	27	Ar	[38]
65	138	0.3	51	35	4	Ar	[39]
210	670	0.1	203	134	5	Ar	[42]

下载: 导出CSV

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