三维厄米-高斯光束经对称化系统的传输特性

Propagation properties of three-dimensional TEM_(m,n)-modeHermite-Gaussian beams through an optical symmetric system

用二阶矩分析法和广义惠更斯 菲涅耳衍射积分方法 ,对三维TEMm ,n模厄米 高斯光束通过对称化光学系统的变换特性作了详细的研究。研究结果表明 ,出射光束是完全对称化的。出射光束实现了二阶矩意义下的对称化 ,并且出射光束的光斑具有旋转对称性。对称化后的光束在自由空间传输时能保持其形状不变。

By using the second order moments method and ge neralized Huygens Fresnel diffraction integral,the transformation properties o f a three dimensional TEM m,n mode Hermite Gaussian beam passing th rough an optical symmetrizing system are studied in detail. It is shown that the symmetrization is complete,because,not only the symmetrizing transformation i s achieved in the second order moments sense,but also the output beam becomes a circular one,and then retains its shape unchanged upon propagation.