Light carrying orbital angular momentum (OAM) has a spatial distribution of intensity and phase, which attracts considerable interest regarding several potential applications in optical and quantum scenarios recently. Spiral phase plates are commonly used elements for generating and analyzing OAM states. In this study, we put forward a method of directly writing binary multi-sector phase plates using the femtosecond laser. These phase plates are engraved on fused silica, which could be applied in high-intensity regimes. Different binary multi-sector phase plates were generated with high quality, which were proved by the observation of their structures, accompanied by detecting the beam patterns with the Gaussian beams. The proposed method provides a crucial basis for the rapid manufacturing of phase plates using convenient equipment, which can generate the superposition OAM states and may lead to the capability of measuring the high-dimensional entanglement.

中文翻译：

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使用飞秒激光在熔融石英上直接写入二进制多扇区相位板

光载轨道角动量 (OAM) 具有强度和相位的空间分布，这引起了人们对最近在光学和量子场景中的几种潜在应用的极大兴趣。螺旋相位板是生成和分析 OAM 状态的常用元件。在这项研究中，我们提出了一种使用飞秒激光直接写入二进制多扇区相位板的方法。这些相位板刻在熔融石英上，可用于高强度区域。高质量地生成了不同的二元多扇区相位板，通过观察它们的结构，并用高斯光束检测光束图案来证明这一点。该方法为使用方便的设备快速制造相位板提供了重要基础，