空心高斯光束通过圆环形硬边光阑的传输特性

Properties of Hollow Gaussian Beam Through an Annular Aperture

通过把环形光阑函数展开为复高斯函数的方法,推导出了空心高斯光束(HGBs)通过环形光阑的传输近似解析公式,并对空心高斯光束通过圆环形硬边光阑的传输特性进行了研究,分析了不同内外半径下的光阑对输出光束的影响。分析结果表明,衍射特性与空心高斯光束的阶数、光阑宽度、光阑内径等因素有关。

The propagation approximation analytic expression and the propagation properties of hollow Gaussian beams （HGBs） through the annular aperture has been studied by using the method of compound Gaussian function. The effect of the output beam caused by different inter and outer radius of the annular aperture also has been analyzed. The results show that,the diffractive properties relative with the order of the HGBs, the width and inner radius of the diaphragm.