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arXiv 2002.02632physics.opticsphysics.plasm-ph
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强光涡旋的最佳拉盖尔-高斯模

Optimal Laguerre-Gaussian Modes for High-Intensity Optical Vortices

Andrew Longman, Robert Fedosejevs

摘要:

随着在高功率激光系统中使用轨道角动量(OAM)模式的兴趣越来越大,需要对焦点处的高强度模式进行精确的数学描述以用于逼真的建模。在这项工作中,我们推导出各种高强度轨道角动量焦斑强度分布所产生的高斯,超高斯,和理想平顶光束常见的高功率激光系统。这些强度分布,然后近似使用拟合的拉盖尔-高斯基函数作为一种实用的方式来描述高功率OAM光束的理论和数值模型。

英文摘要:

With increasing interest in using orbital angular momentum (OAM) modes in high-power laser systems, accurate mathematical descriptions of the high-intensity modes at focus are required for realistic modelling. In this work, we derive various high intensity orbital angular momentum focal spot intensity distributions generated by Gaussian, super-Gaussian, and ideal flat-top beams common to high-power laser systems. These intensity distributions are then approximated using fitted Laguerre-Gaussian basis functions as a practical way for describing high-power OAM beams in theoretical and numerical models.

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