An array-type all-fiber adaptive coupling control system for two-way transmission and reception of space-line polarized light

Abstract

The invention discloses an array all-fiber self-adaptive coupling control system used for space linearly polarized light bidirectional receiving and transmitting. The array all-fiber self-adaptive coupling control system comprises a self-adaptive optical fiber coupler array, a close packing device, a subunit optical fiber splitter group, a coupling energy photoelectric detector group, a multichannel tilt aberration controller, a multichannel high voltage amplifier, an optical fiber phase modulator group, an optical fiber polarization beam combiner group, a three-port optical fiber circulator, an optical fiber polarization detector, a synthetic optical fiber splitter, a synthetic photoelectric detector and a phase-locked controller. All the optical fibers used by the system are polarization maintaining optical fibers. The self-adaptive optical fiber coupler array is utilized to receive beams, and the tilt aberration of the beams in sub-apertures is self-adaptively corrected; phase mismatch between the optical fiber arrays is compensated by adopting an optimization control algorithm so that coherent polarization synthesis is realized; and thus the coupling efficiency of the system can be enhanced and linearly polarized light of which the polarization direction is along the slow axis of the optical fibers is outputted. The system can also be used as a collimating transmitting device, and wavefront precompensation is performed on the collimating beams by utilizing the principle of reversibility of the light path so that the same polarization output is realized.

Description

technical field [0001] The invention relates to an array type all-fiber self-adaptive coupling control system for two-way transmission and reception of spatial line polarized light, which belongs to the technical field of optical engineering. It has important application prospects in free space laser communication, laser atmospheric transmission, laser radar and other fields. Background technique [0002] The light energy coupling technology of space line polarized light to polarization maintaining fiber has important application requirements in fields such as astronomical interferometry, laser radar, and free space laser communication. Affected by factors such as static angular deviation, random angular jitter error, and atmospheric turbulence, it is difficult to achieve efficient and highly stable fiber coupling. Atmospheric turbulence disturbances and other factors make the beam characteristics of light waves change randomly during transmission, resulting in random fluct...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the problem of difficult fiber coupling when there is atmospheric turbulence and other factors, to overcome the problem that the efficiency of coherent polarization combination decreases when there is phase mismatch, and to propose an array for two-way transmission and reception of space line polarized light All-fiber Adaptive Coupling Control System

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