The incorporation of optical wireless communication technology in inter-satellite links, also referred as inter-satellite optical wireless communication (IsOWC) is a key technology capable of providing seamless high-speed information transportation all around the globe. The key factors affecting the IsOWC link performance are transmission range and pointing error angle losses (space turbulence). Further, mode division multiplexing (MDM) is regarded as a spectral-efficient cost-effective technology to transmit high-speed information by exploiting distinct spatial modes of a single laser beam. This works reports the modeling and simulative investigation of a novel MDM based IsOWC link where two independent 40 Gbps channels are transported over distinct Laguerre Gaussian modes of a single laser beam at 6000 km transmission range. Further, we numerically investigate the proposed MDM based IsOWC link performance under the impact of pointing error angle losses and demonstrate a faithful transmission up to 2 μrad pointing error angle. Based on these insights, we propose an IsOWC link tailored for high-speed spectral-efficient information transmission.

将光学无线通信技术并入卫星间链路（也称为卫星间光学无线通信（IsOWC））是一项关键技术，能够在全球范围内提供无缝的高速信息传输。影响IsOWC链路性能的关键因素是传输范围和指向误差角损耗（空间湍流）。此外，模式分割多路复用（MDM）被认为是一种频谱有效的高性价比技术，可以通过利用单个激光束的不同空间模式来传输高速信息。这项工作报告了基于新颖的基于MDM的IsOWC链路的建模和仿真研究，其中两个独立的40 Gbps信道在传输距离为6000 km的单个激光束的不同Laguerre高斯模式下传输。进一步，我们以数值方式研究了在指向误差角损耗的影响下基于MDM的IsOWC链路性能，并证明了高达2μrad指向误差的忠实传输。基于这些见解，我们提出了专为高速频谱效率高的信息传输量身定制的IsOWC链路。