Research on Networking Technologies of Inter-Satellite Laser Communication with Multi-Aperture Arrays

In response to the requirements of the space information network for laser networking, this research proposes a networking technology for inter-satellite laser communication with multi-aperture arrays. Firstly, the margin of the communication link is calculated by combining the indicators of the inter-satellite laser communication networking system with multi-aperture arrays and the engineering implementation capabilities. Then, in view of the impact of the coupling efficiency of the transmission system on the communication link, a fiber coupling assembly and adjustment method based on spiral scanning is proposed. Secondly, the analysis of the reflection system is completed. Through the design of tooling, the splicing and grinding of the reflectors are achieved. It is measured that the surface figure of the transmission system is better than $\lambda / 20$, and the surface figure of the reflection system is better than $\lambda / 10$. Finally, the experimental verification of the space laser communication link in the laboratory is carried out. The experimental results show that the communication rate of the inter-satellite laser communication networking system with multi-aperture arrays is $\geqslant 10 \mathrm{Gbps}$. Under different code patterns, the bit error rate is better than $1 \mathrm{E}-6$, meeting the requirements of the system’s technical indicators and verifying the effectiveness of the methods and core technologies described in this research.