激光束整形为正方框形光束的DOE的设计及实验

The designation and experiment of the DOE applied to shape the laser beam to square frame shape

以几何理论为基础来设计将激光束整形为正方框形光束的衍射光学元件(DOE),推导出了衍射光学元件表面上的相位表达式;以高斯光束整形为例,将其整形为所需要的光强分布;进行了计算机模拟,得到了比较好的结果;同时也进行了实验验证,实验结果证明了设计方法、理论推导以及程序设计的正确性。

Based on geometric theory,diffractive optical eleme nt s applied to shape laser beams is designed,the phase expression of the diffract ive optical elements is deduced.As an example,DOE shaping input Gaussian beam i nto the square frame shape is designed.The calculation results are satisfactory by means of computer simulation.At the same time,experimental results prove the property of the design method,theoretical deduction and program design and the a ccuracy of the design method.