Filamentation characteristics in the transition from cylindrical vector to circularly polarized vortex femtosecond pulses

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-01-22 DOI:10.1016/j.optcom.2025.131551

Haoran Wang , Dongwei Li , Junhui Yu , Yangjian Cai , Zuoqiang Hao , Lanzhi Zhang

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Abstract

This study investigates the influence of polarization on the filamentation characteristics of femtosecond vector and vortex laser pulses. By using a quarter-wave plate (QWP) and a q-plate to vary the polarization distribution of femtosecond laser beam, we transform the beam from a cylindrical vector to a circularly polarized vortex beam. This transition enables precise control over key parameters, including the on-axis maximum intensity and spectral broadening of the generated supercontinuum. As the QWP angle increases from 0° to 45°, we observe a decrease in both the maximum filamentation intensity and spectral broadening. These parameters exhibit periodic variations as the QWP angle is further increased beyond 45°. Furthermore, circularly polarized vortex beams exhibit delayed filamentation onset, shorter filament length, and lower intensity compared to the linearly polarized beams. These findings highlight the critical role of polarization in modulating filamentation dynamics, offering the way for enhanced applications in air lasing, waveguides, and supercontinuum generation.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.