Influence of annular portion of wrapped beam on propagation of central filament

XU Hu; XU Guang; WANG Zhaoqiang; CHEN Xi; LU Chenhui

doi:10.12299/jsues.24-0075

Volume 39 Issue 2

Jun. 2025

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XU Hu, XU Guang, WANG Zhaoqiang, CHEN Xi, LU Chenhui. Influence of annular portion of wrapped beam on propagation of central filament[J]. Journal of Shanghai University of Engineering Science, 2025, 39(2): 229-235. doi: 10.12299/jsues.24-0075

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XU Hu, XU Guang, WANG Zhaoqiang, CHEN Xi, LU Chenhui. Influence of annular portion of wrapped beam on propagation of central filament[J]. Journal of Shanghai University of Engineering Science, 2025, 39(2): 229-235. doi: 10.12299/jsues.24-0075

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Influence of annular portion of wrapped beam on propagation of central filament

doi: 10.12299/jsues.24-0075

School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Received Date: 2024-03-18
Available Online: 2025-09-30
Publish Date: 2025-06-30

Abstract

Abstract

Light filaments are pivotal in ultrafast laser applications, and enhancing the long-distance propagation of light filaments substantially broadens their application prospects.Wrapped beams exhibits characteristics that significantly enhance the long-distance propagation of light filaments, with their annular portions playing a crucial role during propagation. Based on the split-step Fourier transform simulation method, the propagation characteristics of wrapped beams endowed with varied annular segments were systematically investigated through comparative simulation. The results indicate that the input energy, beam waist radius and central distance of the annular portion of the wrapped beam all influence the filament's propagation. Fine-tuning the annular parameters can optimize the propagation efficiency of laser filamentation, expanding the applications domains of ultrafast lasers.
- femtosecond laser filamentation,
- nonlinear propagation,
- multiphoton ionisation,
- split-step Fourier method,
- wrapped beam

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References(18)

References

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