非傍轴矢量离轴椭圆高斯光束的矩孔衍射

根据矢量瑞利衍射积分公式,对非傍轴矢量离轴椭圆高斯光束的矩孔衍射进行了系统的研究,给出了矩孔衍射的解析表达式,并将非傍轴矢量离轴椭圆高斯光束矩孔衍射轴上、近场、远场和单缝衍射光场分布,非傍轴离轴矢量高斯光束以及非傍轴矢量高斯光束的自由空间传输作为特例统一于一般表达式中,研究表明,在矩孔衍射中,f参数,截断参数以及相对离轴参数共同决定着光束的非傍轴行为.

Nonparaxial vectorial off-axis elliptical Gaussian beam diffraction at a rectangular aperture

On the basis of vector Rayleigh diffraction integral formula, an analytical expression for the diffraction of nonparaxial vectorial off-axis elliptical Gaussian beam at a rectangular aperture is derived. And according to that, the on-off and far-field expressions for rectangular diffraction, the propagation formula in free space, slit diffraction and the paraxial far-field diffraction formulae are obtained. It is shown that the f parameter, truncation parameter and relative off-axis parameter affect together the beam nonparaxiality.