intersatellite laser communication system

Abstract

An inter-satellite laser communication system can be applied in free space laser communication. The principle of this system device is that in the transmitting optical path, the intensity-modulated laser is emitted through the common optical path of transceiver after passing through the 45° reflector; Then it is incident on the photoelectric detection unit to realize the position calculation and the extraction of the communication signal. The common light path for transmitting and receiving is composed of front optical wedge, rear optical wedge, transmitting and receiving lens and middle hole reflector. Among them, the establishment of the laser communication link is realized through the coordinated rotation of the front wedge and the rear wedge; the function of the transceiver lens is to focus the received parallel light and collimate the emitted light; the center-hole reflector mainly realizes the transceiver Separation of light paths. The present invention is characterized by adopting the coaxial design scheme of transmitting and receiving, which reduces the volume and improves the stability of the system at the same time. The isolation of the system is increased by using different ways of transmitting wavelength and receiving wavelength. And by using the way of rotating the double optical wedge, the deflection angle of the beam can reach ±30°.

Description

technical field [0001] The invention belongs to the application field of inter-satellite laser communication networking, and is especially suitable for miniaturized, compact and lightweight high-speed, two-way data transmission between micro-satellites with severe resource constraints, specifically an inter-satellite laser communication system . Background technique [0002] Traditional radio frequency communication is limited by its frequency band, making it difficult for its communication rate to exceed 1Gbps. Space laser communication technology has become one of the most effective means to solve the bottleneck of radio frequency communication rate. At present, the high-speed inter-satellite laser communication link generally adopts the coherent laser communication system, which has high communication sensitivity and high communication rate, but the technology is complex and the resource consumption is large. Compared with the coherent communication system, the scheme b...

AI Technical Summary

Problems solved by technology

At present, the high-speed inter-satellite laser communication link generally adopts the coherent laser communication system, which has high communication sensitivity and high communication rate, but the technology is complicated and the resource consumption is large

Compared with the coherent communication system, the scheme based on intensity modulation-direct detection, although its communication sensitivity is low and the communication rate is low

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