Affiliation:
1. East China Normal University
2. University of Chinese Academy of Sciences
Abstract
The nonlinear propagation dynamics of vortex femtosecond laser pulses in optical media is a topic with significant importance in various fields, such as nonlinear optics, micromachining, light bullet generation, vortex air lasing, air waveguide and supercontinuum generation. However, how to distinguish the various regimes of nonlinear propagation of vortex femtosecond pulses remains challenging. This study presents a simple method for distinguishing the regimes of nonlinear propagation of femtosecond pulses in fused silica by evaluating the broadening of the laser spectrum as the input pulse power gradually increases. The linear, self-focusing and mature filamentation regimes for Gaussian and vortex femtosecond pulses in fused silica are distinguished. The critical powers for self-focusing and mature filamentation of both types of laser pulses are obtained. Our work provides a rapid and convenient method for distinguishing different regimes of nonlinear propagation and determining the critical powers for self-focusing and mature filamentation of Gaussian and structured laser pulses in optical media.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Local Science and Technology Development Project of the Central Government
Natural Science Foundation of Shandong Province
Taishan Scholar Foundation of Shandong Province
Innovation Group of Jinan
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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