光在抛物型梯度折射率纤维中传播特性—几何光学研究

Characteristics of Light Propagation in a Parabolic GRIN Rod—Geometrical Optics Analysis

从非均匀介质的光线微分方程出发,导出光在抛物型梯度折射率纤维中的传播轨迹,进而分析了光在抛物型纤维中传播的变振幅和变周期特性,得到光线传播的变周期公式,并求出了几种抛物型纤维的周期长度。最后分析柱形、抛物型及锥形纤维的若干特点并作了比较。

In this paper, based on the ray path equations, the variable-amplitude and variable-period characteristics of tight ray propagation in a parabolic GRIN rod are analysed, The analytical expressions for the period of ray propagation are obtained. The quater-pitch rods are also given and some characteristics of radial narabolic and conical GRIN rod are comnared.