1.2 kW all-fiber narrow-linewidth picosecond MOPA system

IF 5.2 1区物理与天体物理 Q1 OPTICS

High Power Laser Science and Engineering Pub Date : 2023-03-23 DOI:10.1017/hpl.2023.26

Jiexi Zuo, Hai-juan Yu, S. Zou, Z. Dong, Chao-jian He, Shuang Xu, Chaoyu Ning, X. Chen, Xinyao Li, Xuechun Lin

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引用次数: 0

Abstract

Abstract Achieving an all-fiber ultra-fast system with above kW average power and mJ pulse energy is extremely challenging. This paper demonstrated a picosecond monolithic master oscillator power amplifier system at a 25 MHz repetition frequency with an average power of approximately 1.2 kW, a pulse energy of approximately 48 μJ and a peak power of approximately 0.45 MW. The nonlinear effects were suppressed by adopting a dispersion stretched seed pulse (with a narrow linewidth of 0.052 nm) and a multi-mode master amplifier with an extra-large mode area; then an ultimate narrow bandwidth of 1.32 nm and a moderately broadened pulse of approximately 107 ps were achieved. Meanwhile, the great spatio-temporal stability was verified experimentally, and no sign of transverse mode instability appeared even at the maximum output power. The system has shown great power and energy capability with a sacrificed beam propagation product of 5.28 mm $\cdot$ mrad. In addition, further scaling of the peak power and pulse energy can be achieved by employing a lower repetition and a conventional compressor.

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1.2 kW全光纤窄线宽皮秒MOPA系统

实现平均功率在kW以上、脉冲能量在mJ以上的全光纤超快系统是极具挑战性的。本文演示了一种重复频率为25 MHz的皮秒单片主振荡器功率放大器系统，其平均功率约为1.2 kW，脉冲能量约为48 μJ，峰值功率约为0.45 MW。采用色散拉伸种子脉冲(窄线宽0.052 nm)和超大模区多模主放大器抑制了非线性效应;然后实现了1.32 nm的最终窄带宽和大约107 ps的中等宽度脉冲。同时，实验验证了该系统具有良好的时空稳定性，即使在最大输出功率下也没有出现横向模失稳的迹象。该系统显示出强大的功率和能量能力，牺牲的光束传播积为5.28 mm $\ dot$ mrad。此外，峰值功率和脉冲能量的进一步缩放可以通过采用更低的重复频率和传统的压缩器来实现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.