High-reliability spatial optical network communication terminal and method based on optical comb detection

Abstract

The invention relates to a high-reliability spatial optical network communication terminal and method based on optical comb detection, comprising: performing beam pointing alignment on a communicationterminal and an opposite terminal before inter-satellite communication or satellite-to-earth communication; separating signal light and a femtosecond optical comb signal according to signals transmitted by the opposite terminal, and converting the separated signal light into an electrical signal for demodulation; reflecting the separated femtosecond optical comb signal to the communication terminal; determining whether the communication terminal is in the satellite-to-earth optical channel detection state; if so, entering the satellite-to-earth optical channel detection state: converting theseparated femtosecond optical comb signal into an electrical signal for sampling, monitoring the channel attenuation and channel interface mutation, and modulating the signal on the femtosecond optical comb according to the monitoring result; and summarizing and counting the channel quality of each link; and otherwise, entering the inter-satellite ranging state: interfering with the separated femtosecond comb signal and the reference comb to obtain an inter-satellite ranging signal. The invention improves the reliability and flexibility of a spatial optical network.

Description

technical field [0001] The invention belongs to the technical field of space laser communication, and relates to a highly reliable space optical network communication terminal and method based on optical comb detection. Background technique [0002] Space optical communication has the advantages of large communication capacity, high data transmission rate, small transceiver system, and strong anti-electromagnetic interference capability, and has become an important technical means for future space broadband communication. Distributed observation based on small satellite constellation formation can realize earth observation with higher measurement accuracy than before. Time synchronization and broadband communication between small satellites are the technical basis for distributed observation. The satellite-ground communication is affected by atmospheric attenuation and turbulence, which has a great impact on high-reliability communication. [0003] A high-reliability space ...

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the invention is to solve the problem of inter-satellite precision ranging and broadband communication integration and the problem of insufficient reliability of the satellite-ground optical link

Images