Petrov Nikolai I
J Opt Soc Am A Opt Image Sci Vis. 2016 Jul 1;33(7):1363-9. doi: 10.1364/JOSAA.33.001363.
It is shown that the vector-vortex Laguerre-Gauss modes with polarization-orbital angular momentum (OAM) entanglement are the vector solutions of the Maxwell equations in a graded-index medium. Focusing of linearly and circularly polarized vortex light beams with nonzero azimuthal and radial indices in a cylindrical graded-index waveguide is investigated. The wave shape variation with distance taking into account the spin-orbit and nonparaxial effects is analyzed. The effect of long-term periodic revival of wave packets due to mode interference in a graded-index cylindrical optical waveguide is demonstrated. High efficiency transfer of a strongly focused spot through an optical waveguide over large distances takes place with a period of revival.
结果表明，具有偏振 - 轨道角动量（OAM）纠缠的矢量 - 涡旋拉盖尔 - 高斯模式是渐变折射率介质中麦克斯韦方程组的矢量解。研究了在圆柱形渐变折射率波导中具有非零方位角和径向指数的线偏振和圆偏振涡旋光束的聚焦。分析了考虑自旋 - 轨道和非傍轴效应时波形随距离的变化。证明了渐变折射率圆柱形光波导中由于模式干涉导致的波包长期周期性复苏的效应。在复苏周期内，强聚焦光斑通过光波导在大距离上实现了高效传输。
