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Common-path generation of stable cylindrical perfect vector vortex beams of arbitrary order
Optics Communications ( IF 2.4 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.optcom.2020.125807
Arabinda Mandal , Satyajit Maji , Maruthi M. Brundavanam

A Highly flexible and efficient method of generating stable radially and Azimuthally polarized perfect optical vortex beams and all higher-order cylindrical vector vortex beams are proposed and demonstrated. The method is the most convenient implementation of the superposition of two orthogonally circularly polarized optical vortex beams of arbitrary integer topological charges. By simply controlling the relative amplitude and phase between vertical and horizontal polarization component of an input perfect vortex beam on a phase-sensitive Spatial Light Modulator (SLM) and using a common-path interferometry, all arbitrary order Poincare beams are prepared. Calibration curve of relative phase vs grey-scale of the phase function on the SLM is drawn to facilitate the determination of required phase-offset using pre-calculated grey-scale colour-map. Generated beams states of polarization are uniformly distributed throughout the beam cross-section. The interference pattern of the two-beam in a projected linear polarization state also gives the cylindrically symmetric petal beams with control over the number and orientation of petals.

中文翻译:

任意阶稳定圆柱完美矢量涡旋光束的共路径生成

提出并演示了一种高度灵活和高效的方法,可以生成稳定的径向和方位角偏振的完美光学涡旋光束和所有高阶柱面矢量涡旋光束。该方法是任意整数拓扑电荷的两个正交圆偏振光学涡旋光束叠加的最方便的实现。通过在相敏空间光调制器 (SLM) 上简单地控制输入完美涡旋光束的垂直和水平偏振分量之间的相对幅度和相位,并使用共路径干涉测量法,可以制备所有任意阶庞加莱光束。绘制了 SLM 上相位函数的相对相位与灰度的校准曲线,以便使用预先计算的灰度颜色图来确定所需的相位偏移。生成的光束偏振态均匀分布在整个光束横截面。投影线性偏振状态下的两束干涉图也给出了圆柱对称花瓣光束,可以控制花瓣的数量和方向。
更新日期:2020-08-01
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