Femtosecond laser filamentation in simulated atmospheric turbulence [Invited]

IF 3.3 2区物理与天体物理 Q2 OPTICS

Chinese Optics Letters Pub Date : 2023-01-01 DOI:10.3788/col202321.110004

Jiewei Guo, Lu Sun, Yuezheng Wang, Jiayun Xue, Zhi Zhang, Haiyi Liu, Shishi Tao, Wenqi Qian, Pengfei Qi, Lie Lin, Weiwei Liu

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引用次数: 0

Abstract

The effects of turbulence intensity and turbulence region on the distribution of femtosecond laser filaments are experimentally elaborated. Through the ultrasonic signals emitted by the filaments, it is observed that increasing turbulence intensity and an expanding turbulence active region cause an increase in the start position of the filament and a decrease in filament length, which can be well explained by theoretical calculation. It is also observed that the random perturbation of the air refractive index caused by atmospheric turbulence expands the spot size of the filament. Additionally, when the turbulence refractive index structure constant reaches 8.37×10-12 m-2/3, multiple filaments are formed. Furthermore, the standard deviation of the transverse displacement of filament is found to be proportional to the square root of the turbulent structure constant under the experimental turbulence parameters in this paper. These results contribute to the study of femtosecond laser propagation mechanisms in complex atmospheric turbulence conditions.

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模拟大气湍流中的飞秒激光细丝[特邀]

实验阐述了湍流强度和湍流区域对飞秒激光细丝分布的影响。通过细丝发出的超声信号观察到，湍流强度的增加和湍流活动区域的扩大导致了细丝起始位置的增加和细丝长度的减少，这可以用理论计算很好地解释。还观察到大气湍流引起的空气折射率的随机扰动扩大了灯丝的光斑尺寸。另外，当湍流折射率结构常数达到8.37×10-12 m-2/3时，会形成多个细丝。此外，本文还发现在实验湍流参数下，细丝横向位移的标准差与湍流结构常数的平方根成正比。这些结果有助于研究复杂大气湍流条件下飞秒激光的传播机制。

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

Chinese Optics Letters 物理-光学

CiteScore

5.60

自引率

20.00%

发文量

180

审稿时长

2.3 months

期刊介绍： Chinese Optics Letters (COL) is an international journal aimed at the rapid dissemination of latest, important discoveries and inventions in all branches of optical science and technology. It is considered to be one of the most important journals in optics in China. It is collected by The Optical Society (OSA) Publishing Digital Library and also indexed by Science Citation Index (SCI), Engineering Index (EI), etc. COL is distinguished by its short review period (~30 days) and publication period (~100 days). With its debut in January 2003, COL is published monthly by Chinese Laser Press, and distributed by OSA outside of Chinese Mainland.