A large-area apd space laser regeneration device

Abstract

The invention relates to a large-area APD space laser regeneration device, comprising a circular body, a power supply module and a circuit board are arranged on the circular body, and the circuit board includes an optical input unit, an optical input unit, a monitoring unit and a main control MCU unit , wherein the optical input unit includes an APD module, a DC_DC boosting module, and a limiting amplifier module; the optical output unit includes a switch selection module, a laser modulation module, an alternative transceiver module and an optical fiber output port, and the limiting amplifier module outputs The electrical signal of the laser modulation module and the optical fiber output port output the regenerated optical signal. The large-area APD module is used to improve the photodetection sensitivity. At the same time, the output of the space laser regenerator includes two output modes. Not only can the amplified electrical signal be modulated by the modulator to generate a laser with stable optical power, and Through the optical fiber output, the corresponding laser can also be sent out through the optical transceiver module to realize the regeneration of the laser.

Description

technical field [0001] The invention relates to the field of wireless laser communication, in particular to a large-area APD space laser regeneration device. Background technique [0002] At present, most of the high-speed laser communication adopts the fiber coupling method for wired communication. For wireless laser communication, the laser tube emits laser light after passing through the EDFA and collimator, and then is coupled to the transmitting antenna to transmit the wireless laser to the space. When the laser is transmitted through the atmospheric channel, it cannot be Avoid being affected by atmospheric turbulence, causing a series of atmospheric turbulence effects such as light intensity flicker, arrival angle fluctuation, beam drift, etc. of the laser beam, which in turn cause spot jitter, phase distortion, fluctuation of received optical power, and increased communication bit error rate. In severe cases, communication may be interrupted, affecting the reliability...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a large-area APD space laser regeneration device, which aims to solve the problem of low coupling efficiency, low sensitivity and high communication bit error rate caused by too small photosensitive surface area of ​​the detector in space laser communication. question

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