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Tunable focusing of sine-azimuthal wavefront modulated cosh-Gaussian beams by one spiral optical vortex

机译:正弦-方位角波前调制的Cosh-Gaussian光束通过一个螺旋光学涡旋的可调聚焦

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摘要

Optical intensity distributions in the focal region play an important role in many optical systems. In this paper, the tunable focusing properties of linearly polarized hyperbolic-cosine-Gaussian beams with sine-azimuthal variation wavefront were investigated by adding a spiral optical vortex. It was found that the focal patterns can be altered very considerably by changing the charge number of the optical vortex under a different phase parameter that indicates the phase change frequency upon increasing the azimuthal angle. The symmetry of focal patterns also changes remarkably upon increasing the charge number. And some novel focal patterns may appear, including a multiple-peak array, wheel focal pattern, or swallow-tailed focal pattern.
机译:焦点区域中的光强度分布在许多光学系统中起着重要作用。本文通过添加螺旋光学涡旋研究了具有正弦-方位角变化波阵面的线性偏振双曲余弦-高斯光束的可调聚焦特性。已经发现,可以通过在不同的相位参数下改变光学涡旋的电荷数来非常显着地改变焦点图案,该相位参数指示在增加方位角时的相变频率。聚焦图案的对称性也随着电荷数的增加而显着变化。并且可能会出现一些新颖的聚焦图案,包括多峰阵列,车轮聚焦图案或燕尾聚焦图案。

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