高阶模激光束的聚焦

Focusing Laser Beams with Higher-Order Mode

本文给出了厄米——高斯光束和拉盖尔——高斯光束的高阶模光斑半径与基模光斑半径的比值K_(mn),利用该系数,导出了高阶模激光束经薄透镜变换的计算公式,这些公式不仅适用于厄米——高斯光束,也适用于拉盖尔——高斯光束。

The ratio of spot size of higher-order mode Laser beams to spot size of fundemental-mode is presented both for Hermite-Gaussian and Laguerre-Gaussian beams. Using the ratio, we present the equation of thin lens-transforming higher-order mode beams.Not only is it suitable for Hermite-Gaussian beams,but for Laguerre-Gaussian also.