Ultra-long distance optical communication system and ultra-long distance optical communication method based on single-photon detection

Abstract

The invention discloses an ultra-long distance optical communication system and an ultra-long distance optical communication method based on single-photon detection, which is particularly applicable to the occasions with ultra-long distance communication. In the invention, aiming at the contradictions between the international requirements on deep-space exploration and deep-space communication and the limits of traditional microwave communication system on power consumption, bandwidth and the like, the spatial optical communication mode with the following advantages is adopted: large channel capacity, low power consumption, small volume, light weight, high confidentiality, strong anti-interference and the like; based on the rising single-photon detection technology, the invention provides the ultra-long distance optical communication system and the ultra-long distance optical communication method based on single-photon detection; the coding modulation mode in which the differential pulse position modulation and the polarization modulation are combined with each other is adopted; furthermore, the spatial high-precision tracking, capturing and aiming technology is adopted; by the optical machine structure with reasonable design and the communication method of the system, the chain and system consumption of the spatial optical communication can be reduced; the communication bandwidth can be improved; and the power consumption of communication system can be greatly reduced, thus meeting the requirement on the ultra-long distance optical communication, therefore, the system and the method are especially applicable to the occasions with ultra-long distance optical communication.

Description

[0001] technical field [0002] The invention relates to an optical communication technology for an ultra-long-distance optical communication system, in particular to an ultra-long-distance optical communication system and method based on single photon detection. Background technique [0003] At the current stage of the 21st century, the overall level of the world's aerospace industry is making great strides. Not only has the exploration and occupation of the moon entered a substantive stage, but the footprint of exploration extends farther into deep space. Mars is bound to become the world's aerospace industry. The next target of great power competition. In order to better complete scientific missions such as detection, deep space satellites need to transmit the data obtained by detection back to the ground workstation in real time, and receive new commands from the ground station to adjust the current working status. When the deep-space satellite reaches the detection dis...

AI Technical Summary

Problems solved by technology

When the deep-space satellite reaches the detection distance of Mars orbit or even farther, the shortcomings of the original communication methods such as radio wave communication are gradually enlarged. Excessive load power consumption makes it difficult to maintain a stable working state of the deep-space satellite. Real-time communication The security and anti-interference of the communication system are also aspects that need to be considered. In the face of electromagnetic attacks and eavesdroppers, the system will become vulnerable; and the communication rate of radio wave communication has also entered the bottleneck of 1Mbps. Further demands for deep space exploration may not be adequately met

Images