矢量涡旋光束的生成、传输及畸变校正技术研究

矢量涡旋光束是一种同时具有偏振涡旋和相位涡旋的结构光束，在探测、光通信、材料加工等领域具有重要的应用前景。本项目计划研究腔内法生成偏振态和轨道角动量态可调控的矢量涡旋光场的技术，在此基础上研制1.6微米波段矢量涡旋光束激光器，并研究矢量涡旋光束在非均匀介质中的传输特性及其光束畸变校正技术。本项目将重点解决腔内含有q波片、四分之一波片等元器件的激光谐振腔设计技术，通过调控q波片、四分之一波片等元器件的角度实现矢量涡旋光场的相位和偏振的任意调控；将采用典型大气湍流模型研究矢量涡旋光束在非均匀介质中的传输特性，提出基于高斯探针光束的矢量涡旋光束畸变校正方法和直接以矢量涡旋光束的像面信息为评价标准的畸变校正方法，并实现光束畸变的校正。本项目申请团队在涡旋光束和矢量光束的生成等方面有很好的研究基础，研究结果对于矢量涡旋光束的应用具有重要的科学意义。

Vectorial vortex beams are a new kinds structural beams with both polarization and phase vortices, which have important applications in fields of detection, optical communication and material processing, etc. This project will study intra-cavity methods of generating vectorial vortex beams with controllable polarization states and orbital angular momentum (OAM) states, and develop 1.6um vectorial vortex beam lasers. The propagation of vectorial vortex beams in inhomogeneous mediums and distortion correction methods will be also investigated. Key techniques of designing the laser resonator with intra-cavity q-plates and quarter-wave plates will be solved, and vectorial vortex beams with controllable OAM and polarization states will be generated by manipulating the orientations of q-plates and quarter-wave plates. The propagation of vectorial vortex beam in inhomogeneous mediums will be analyzed by using typical atmospheric turbulence models. Two methods will be proposed for the distortion correction of vectorial vortex beams, including the Gaussian probe beam method and the direct image plane beam pattern method. The project team has solid foundation in fields of generation of vortex beams and vector beams. The results of this project are of great importance for the scientific applications of vectorial vortex beams.