面向动态连接的激光相控通信机理与全光组网方法研究

With the requirements on the multiple access and high speed data transmission on space based information network, fundamental mechanism and scientific approaches are proposed to build an all optical phase controlled laser communication network based on the technique of liquid crystal optical phased array. The multi-parameters method is introduced to phase configure the laser beam including shaping, steering and multi-beam forming, so as to achieve the network topology of star and dynamic linking. Meanwhile, some phase-control based strategies are studied to realize a fast acquisition and precise tracking on the process of building a physical connection and maintaining a communication link, respectively. A system of theoretical principles on how-to build an optical phased network is constructed on the constrain condition of large scale space-time domain to develop a semi physical platform as a simulation kit on optical phased network analysis. New concepts or methods of “Multi-parameter dynamically beams control” “Parallel multi-wave-vectors and probability-density mutual correlation” “Logical sub-aperture self-correlation” are suggested to solve the significant difficulties of dynamic multiple access, fast acquisition and precise tracking. Meanwhile, a couple of experiments are designed to verify the above mentioned methods and principles including beam control, multi-beam forming, multiple access, fast acquisition, precise tracking. In conclusion, the technique of optical phase control is proposed theoretically and experimentally to completely solve the short leg of mechanical laser beam deflector such as solo beam, long time acquisition and low tracking precision. Innovative principles and methods are suggested to promote a rapid development on optical phase communication and network construction.

针对空间信息网络中多用户组网和信息高速传输的需求，探索基于液晶光学相控阵天线的激光通信机理和多址接入组网体制；研究激光通信适用的多参量动态波束控制原理，解决点多点激光链路的动态连接问题；研究激光相控通信的快速捕获和高精度跟踪方法，解决多用户动态接入的链路建立和通信保持问题。构建原理验证实验平台，开展模拟实验，检验“多参量动态波控方法”、“并行多波矢概率互相关法”、“逻辑子孔径自相干法”等创新方法。运用学科交叉综合创新的手段，通过理论与实验有机结合的方式，培育形成激光相控通信动态组网的原理体系、大尺度时空条件下激光相控传输理论模型等研究成果，支持空间信息网络重大研究计划总体科学目标的实现。

针对空间信息网络中多用户组网和信息高速传输的需求，探索基于液晶光学相控阵天线的激光通信机理和多址接入组网体制、多参量动态波束控制原理，解决多用户动态连接、快速捕获、高精度跟踪方法。申请人在本重大研发计划培育项目的支持下，已经完成相关的理论模型研究，并搭建原理验证实验平台，开展模拟验证实验，完成一系列创新方法的验证。包括：高阶光栅法实现液晶光学相控阵宽覆盖范围、幅相共调法实现液晶光学相控阵多波束生成、斜入射光束的后向传输特性、消偏振二维波束扫描系统、逻辑子孔径相干波束控制方法、随机波束扫描方法提高捕获概率、多用户相控捕跟接入方法等。发表学术论文 30 篇，其中， SCI 收录源刊论文 15 篇，学术会议研究论文 11篇，其中5篇发表在国际顶级光学会议SPIE Photonics West中；授权或申请发明专利9 项；初步形成了一个具备相控激光通信系统设计、核心元器件研制的团队。形成激光相控通信动态组网的原理体系、大尺度时空条件下激光相控传输理论模型等研究成果，为空间信息网络重大研究计划总体科学目标提供理论支撑。