Self-adaptive optical fiber array type laser transmit-receive system used for spatial coherent light communication

Abstract

The invention discloses a self-adaptive optical fiber array type laser transmit-receive system used for spatial coherent light communication, which comprises a self-adaptive optical fiber coupler array, an integrated device, a subunit optical fiber branching device group, a coupling energy photoelectric detector group, a multichannel high voltage amplifier, a multichannel tilt aberration controller, a N X 1 self-adaptive beam combination module, a three-port optical fiber circulator, a signal loading phase modulator, a signal emission laser, a local oscillator laser, a local oscillator optical phase modulator, a mixer, a balanced detector, a digital signal demodulation module, a low pass filter and a frequency mixing piston aberration controller. The self-adaptive optical fiber coupler array is utilized to divide beams and to correct the tilt aberration in a subaperture; the piston aberration between optical fiber arrays is compensated by adopting an optimized control algorithm, so as to realize beam combination to strengthen the light energy of a received signal, and improve the mixing efficiency of signal light and intrinsic light, thereby reducing the bit error rate; the self-adaptive optical fiber array type laser transmit-receive system also can be used as a transmitting terminal, and wavefront pre-compensation for transmitting signal light is realized by utilizing the reciprocity principle of a light path.

Description

technical field [0001] The invention relates to an adaptive optical fiber array laser transceiver system for space coherent optical communication, which belongs to the technical field of optical engineering. It has important application prospects in the field of free space laser communication. Background technique [0002] Adaptive optics technology can be used to improve the imaging resolution of the imaging optical system and the beam quality of the laser transmission system, and has been successfully applied in systems such as astronomical observation, laser atmospheric transmission, and wireless laser communication. The traditional adaptive optics system usually consists of a wavefront sensor, a wavefront controller and a wavefront corrector. The wavefront sensor is used to detect the slope or curvature information of the wavefront. The algorithm restores the overall wavefront, and according to the restored wavefront, controls wavefront correctors such as deformable mir...

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention are: to overcome the shortcomings of traditional adaptive optics technology applied to spatial coherent optical communication systems, to overcome the adverse effects of atmospheric turbulence effects on optical fiber coupling efficiency, to overcome the optical path mismatch of optical fiber arrays on coherent beam combining In order to improve the efficiency of coherent beam combining and frequency mixing, an adaptive optical fiber that can adaptively optimize the laser coupling efficiency of the fiber array and compensate the optical path mismatch of the fiber array in real time can improve the communication quality. Array Laser Transceiver System

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