论文标题
通过仅相位重塑结构化的光，改善光束质量因子（$ m^2 $）
Improving the beam quality factor ($M^2$) by phase-only reshaping of structured light
论文作者
论文摘要
激光亮度在许多光学过程中至关重要，并且通过高功率，远光质量（低$ m^2 $）梁进行了优化。在这里，我们展示了如何使用连续的纯相元素以无损的方式改善任意结构的光场的激光束质量因子（减少$ m^2 $），从而可以通过简单的线性光学转换来增加亮度。我们用四个高$ m^2 $初始光束演示了原理，将每个光束转换为高斯（$ m^2 \ 1 $），亮度急剧增加$> 10 \ times $。这项工作为通过二进制衍射光学器件改善激光束质量的旧辩论提供了新的视角，同时提供了一种实用方法来增强对任意输入光束的激光亮度。
Laser brightness is crucial in many optical processes, and is optimised by high power, high beam quality (low $M^2$) beams. Here we show how to improve the laser beam quality factor (reducing the $M^2$) of arbitrary structured light fields in a lossless manner using continuous phase-only elements, thus allowing for the increase in brightness by a simple linear optical transformation. We demonstrate the principle with four high $M^2$ initial beams, converting each to a Gaussian ($M^2 \approx 1$) with a dramatic increase in brightness of $>10 \times$. This work puts a new perspective on the old debate of improving laser beam quality with binary diffractive optics, while providing a practical approach to enhancing laser brightness for arbitrary input beams.
