Annular Pump-Based OPCPA for Vortex Pulses Amplification

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-05 DOI:10.1016/j.optcom.2025.132427

Mingxiong Li , Bin Zhang , Feng Lu , Zheqiang Zhong

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引用次数: 0

Abstract

We proposed and numerically studied an optical parametric chirped amplification (OPCPA) scheme for amplification of ultrashort vortex pulses using annular pump beams. Compared to the scheme using super-Gaussian pump beams, the annular pump beam can provide better spatial overlap with the vortex beam, enhancing energy conversion efficiency while preserving the annular intensity distribution of the vortex beam. Numerical simulation results demonstrate advantages of the annular pump scheme over the super-Gaussian pump scheme. Firstly, the annular pump scheme significantly reduces the shift of the helical phase singularity while better maintaining the intensity symmetry of the signal beam along the walk-off direction. Secondly, it achieves higher energy conversion efficiency. Finally, under the condition that the total pump energy input is equal, the annular scheme produces a broader output signal spectral bandwidth compared to the super-Gaussian scheme. Furthermore, the impact of noncollinear angle on vortex purity, as well as the effects of intensity distribution distortion and wavefront phase distortion of both the signal and pump beams on the performance of the annular pump scheme, were analyzed in detail. We hope these results can provide novel insights and references for the design of ultrashort vortex pulse optical parametric amplification systems.

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基于环形泵的涡旋脉冲放大OPCPA

提出了一种利用环形泵浦光束放大超短涡旋脉冲的光学参数啁啾放大方案，并进行了数值研究。与使用超高斯泵浦光束的方案相比，环形泵浦光束可以与涡旋光束提供更好的空间重叠，在保持涡旋光束环形强度分布的同时提高能量转换效率。数值模拟结果表明，环形泵方案优于超高斯泵方案。首先，环空泵浦方案显著降低了螺旋相位奇点的位移，同时较好地保持了信号波束沿走行方向的强度对称性。其次，实现了更高的能量转换效率。最后，在泵浦总能量输入相等的条件下，环形方案比超高斯方案产生更宽的输出信号频谱带宽。此外，还详细分析了非共线角对旋涡纯度的影响，以及信号和泵浦光束的强度分布畸变和波前相位畸变对环形泵浦方案性能的影响。我们希望这些结果能够为超短涡旋脉冲光参量放大系统的设计提供新的见解和参考。

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

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.