High-power fiber laser phased array high-speed information transmitting device capable of being dynamically connected

Abstract

A high-power fiber laser phased array high-speed information transmitting device capable of being dynamically connected is applied to the field of super-remote-distance space communication. To achieve high-speed laser high-power emission and super-remote-distance transmission, a seed source undergoes beam split through a coupler, a beam of light is input into phase controllers as reference light, and the other beam of light undergoes high-speed information modulation; a radio-frequency signal generator and the other beam of light enter an intensity modulator to obtain a high-speed modulation signal, the high-speed modulation signal enters the four phase controllers respectively to carry out phase control after undergoing uniform light split through the coupler, four beams of high-speed modulated light are obtained, and the four beams of high-speed modulated light enter four optical fiber amplifiers respectively to be amplified at a high power and then undergo coherent beam combination through a beam combiner; a beam splitter outputs 1% of a combined laser into the phase controllers, the combined laser undergoes phase comparison with the reference light, the comparison result is processed by the phase controllers to send out phase control signals, and four phase modulators control the phases of the beams of light respectively after receiving the phase control signals to guarantee coherent beam combination and emission angle scanning.

Description

technical field [0001] The invention relates to a dynamically connected high-power optical fiber laser phased array high-speed information transmitting device, which is applied to ultra-long-distance space communication fields such as deep space and interstellar space. Background technique [0002] A large amount of scientific data generated by space exploration needs to rely on large-capacity, ultra-long-distance space information transmission technology. The biggest feature of deep space communication is long-distance non-relay transmission, the launch power of spacecraft is limited, and the radio frequency propagation loss is proportional to the square of the distance, and the radio frequency signal also limits the transmission bandwidth of communication. Therefore, how to make up for the huge loss and realize long-distance broadband communication is the biggest problem facing deep space communication. In the field of deep space communication, laser communication can ove...

AI Technical Summary

Problems solved by technology

[0003] At present, the laser communication system adopts a separate high-precision tracking and aiming device, and the main oscillation power amplification and transmitting system after the 1.55μm semiconductor laser seed source is passed through the erbium-doped fiber amplifier, the maximum power is only about 5W due to the limitation of the saturated output of the amplifier, thus limiting Ultra-long-distance deep space transmission

Fiber lasers have the advantages of high efficiency, good beam quality, and high output power, while fiber lasers are generated in very thin cores, which cannot withstand large average power and low single-core power

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