脉冲重复率对空气中飞秒激光灯丝内部强度的影响

IF 5.2 1区物理与天体物理 Q1 OPTICS High Power Laser Science and Engineering Pub Date : 2023-03-30 DOI:10.1017/hpl.2023.31

Fukang Yin, J. Long, Yaoxiang Liu, Yingxia Wei, B. Zhu, Kainan Zhou, Tie-Jun Wang, Y. Leng, Ruxin Li

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引用次数: 0

摘要

随着高强度、超短、千赫重复率激光系统的商业化，脉冲累积效应对基于激光灯丝的应用至关重要。本文从数值和实验两方面研究了脉冲重复率对飞秒激光在空气中成丝的影响。脉冲重复率效应在灯丝前缘的影响可以忽略不计。高重复脉冲在激光灯丝的峰端和尾端有明显的强度增强。当激光脉冲的重复频率从100 Hz增加到1000 Hz时，灯丝的长度延长，灯丝内部的强度增加。提出了一种基于脉冲重复率相关的“低密度空穴”效应的物理图像来很好地解释所得到的结果。

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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Pulse repetition-rate effect on the intensity inside a femtosecond laser filament in air

Abstract As intense, ultrashort, kHz-repetition-rate laser systems become commercially available, pulse cumulative effects are critical for laser filament-based applications. In this work, the pulse repetition-rate effect on femtosecond laser filamentation in air was investigated both numerically and experimentally. The pulse repetition-rate effect has negligible influence at the leading edge of the filament. Clear intensity enhancement from a high-repetition pulse is observed at the peak and tailing edge of the laser filament. As the repetition rate of the laser pulses increases from 100 to 1000 Hz, the length of the filament extends and the intensity inside the filament increases. A physical picture based on the pulse repetition-rate dependent ‘low-density hole’ effect on filamentation is proposed to explain the obtained results well.

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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.