基于涡旋光源优化控制的激光大气空间远距离耦合性能研究

The long-distance laser couplings in atmosphere are widely used in the laser free-space communications and the laser space defenses.Due to the influences of the diffraction and the atmospheric distortions,beam intensity concentrates on the center and beam spot spreads in the atmospheric propagation and coupling process, power of the received beam may be seriously degraded due to central blocking and outer truncation induced by the telescope receiver,and the power losses increase with the increase of the propagation distance.How to effectively degrade the serious power losses in the long-distance laser coupling in atmosphere has become an urgent problem in scientific research. Based on the new idea of the long-distance laser coupling in atmosphere with optimized vortex source, the program plans to investigate the contents including the theoretical model of vortex beam atmospheric propagation and coupling,the optimization method of the vortex source,and the performance of the long-distance laser coupling in atmosphere with optimized vortex source by using the methods including theoretical analysis,numerical simulation and the reduced-scale experimental study.Results of the program may present an effective method to improve the power efficiency in the long-distance laser coupling, and provide good references for the engineering applications of the long-distance laser coupling with the vortex source.

激光大气空间远距离耦合在激光自由空间通信和激光空间防御等领域具有广泛的应用。多项研究表明，在激光大气空间传输和耦合接收过程中，衍射作用和大气扰动会导致光斑能量中心聚集和外围扩散，接收望远镜主镜截断和次镜遮拦会导致严重的能量损耗，且传输距离越远，能量损耗越严重。如何有效降低激光大气空间远距离耦合过程的严重能量损耗已成为当前急需解决的关键问题。项目基于涡旋光源优化控制的激光大气空间远距离耦合的全新构想，对涡旋光束大气空间远距离传输与耦合理论模型、涡旋光源优化控制方法和涡旋光束大气空间远距离耦合性能等科学问题开展理论分析、数值模拟和缩比实验研究。项目的预期研究成果将有效解决激光空间远距离耦合能量效率低的问题，为涡旋光束大气空间远距离耦合的工程应用提供科学指导和有效参考。

激光大气空间远距离耦合在激光自由空间通信和激光空间防御等领域具有广泛的应用。多项研究表明，在激光大气空间传输和耦合接收过程中，衍射作用和大气扰动会导致光斑能量中心聚集和外围扩散，接收望远镜主镜截断和次镜遮拦会导致严重的能量损耗，且传输距离越远，能量损耗越严重。如何有效降低激光大气空间远距离耦合过程的严重能量损耗已成为当前急需解决的关键问题。项目基于涡旋光源优化控制的激光大气空间远距离耦合的全新构想，对涡旋光束大气空间远距离传输与耦合理论模型、涡旋光源优化控制方法和涡旋光束大气空间远距离耦合性能等科学问题开展理论分析、数值模拟和缩比实验研究。项目的研究成果为解决激光空间远距离耦合能量效率低的难题提供了新方法，为涡旋光束大气空间远距离耦合的工程应用提供科学指导和有效参考。