利用空心芯光纤压缩和超强激光倍频产生超宽带脉冲

IF 5.2 1区物理与天体物理 Q1 OPTICS

High Power Laser Science and Engineering Pub Date : 2023-01-11 DOI:10.1017/hpl.2022.44

Yanyan Li, Beijie Shao, Yujie Peng, Junyu Qian, Wenkai Li, Xinliang Wang, Xingyan Liu, Xiaoming Lu, Yi Xu, Y. Leng, Ruxin Li

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引用次数: 0

摘要

摘要研究了一种基于级联光参量放大、空心芯光纤(HCF)和二次谐波产生过程的超宽带高时间对比度红外激光器。在该装置中，使用氩气填充的HCF，约1.8 μm激光脉冲的光谱具有接近1 μm的全带宽。随后，通过级联晶体倍频和熔融硅楔对色散补偿，可以产生9.6 fs(~3个周期)、150 μJ的脉冲，脉冲中心为910 nm，全带宽超过300 nm。输出激光脉冲在20 min内的能量稳定性为0.8%(均方根值)，在主脉冲前-10 ps处的时间对比度>1012。该激光器具有优良的时空特性和稳定性，可作为超强、超快激光系统的优良种子源。

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Ultra-broadband pulse generation via hollow-core fiber compression and frequency doubling for ultra-intense lasers

Abstract We demonstrate an ultra-broadband high temporal contrast infrared laser source based on cascaded optical parametric amplification, hollow-core fiber (HCF) and second harmonic generation processes. In this setup, the spectrum of an approximately 1.8 μm laser pulse has near 1 μm full bandwidth by employing an argon gas-filled HCF. Subsequently, after frequency doubling with cascaded crystals and dispersion compensation by a fused silica wedge pair, 9.6 fs (~3 cycles) and 150 μJ pulses centered at 910 nm with full bandwidth of over 300 nm can be generated. The energy stability of the output laser pulse is excellent with 0.8% (root mean square) over 20 min, and the temporal contrast is >1012 at –10 ps before the main pulse. The excellent temporal and spatial characteristics and stability make this laser able to be used as a good seed source for ultra-intense and ultrafast laser systems.

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来源期刊

High Power Laser Science and Engineering Physics and Astronomy-Nuclear and High Energy Physics

CiteScore

7.10

自引率

4.20%

发文量

401

审稿时长

21 weeks

期刊介绍： High Power Laser Science and Engineering (HPLaser) is an international, peer-reviewed open access journal which focuses on all aspects of high power laser science and engineering. HPLaser publishes research that seeks to uncover the underlying science and engineering in the fields of high energy density physics, high power lasers, advanced laser technology and applications and laser components. Topics covered include laser-plasma interaction, ultra-intense ultra-short pulse laser interaction with matter, attosecond physics, laser design, modelling and optimization, laser amplifiers, nonlinear optics, laser engineering, optical materials, optical devices, fiber lasers, diode-pumped solid state lasers and excimer lasers.