非傍轴矢量光束二阶矩的发散特性

基于非傍轴矢量光束横截面上光强的精确表示和矢量二阶矩理论，应用严格的角谱表示的矢量衍射理论，对任意非傍轴矢量衍射光束的传输进行了系统的研究.给出了光束的束宽、横向发散角的积分表达式，论证了非傍轴矢量光束二阶矩的发散特性.对非傍轴矢量光束的束宽、发散角的定义及一些相关的问题进行了分析和讨论.关键词：矢量衍射理论光束传输矢量二阶矩发散特性

Divergent characteristic of the second order moment of nonparaxial vector beams

Based on the accurate expression of light intensity of nonparaxial vector beams at the transverse plane and the vectorial second order moment theory of light beam propagation, by applying rigorous vectorial diffraction theory of the angular spectrum representation, the nonparaxial propagation of any vectorial diffraction beam has been systemically investigated, the integral expressions of beam width, transversal divergence angle have been presented, and the divergent characteristic of the second order moment of nonparaxial vector beams has been demonstrated. The definitions of beam width, transversal divergence angle of non paraxial vector beams and some related problems have been discussed.