A Coherent Laser Combination System

Abstract

The invention discloses a coherent laser synthesis system, which includes a laser source and a lens array, the lens array includes a plurality of lenses, and the lenses are arranged according to a preset fermat spiral array with non-equal period and non-uniform space density; wherein, the laser source is used for Generate multiple laser beams, the laser beams meet the coherence conditions, and the multiple laser beams correspond to multiple lenses one by one; the lens is used to receive multiple laser beams and collimate the multiple laser beams, so that each of the laser beams emitted by the lens The laser beams are coherently superimposed in the far field to obtain a composite beam. The present invention arranges the lenses according to the Fermat spiral array with non-equal period and non-uniform spatial density, so that the lens arrays are all arranged in a compact center and sparse edge, and then the power ratio in the barrel of the coherent composite far field is improved. At the same time, the side lobe strength of the coherent synthesis far field is weakened.

Description

Technical field [0001] The present invention belongs to the field of coherent laser technology, specifically relates to a coherent laser synthesis system. Background [0002] Continuously obtaining high-power, high-beam quality laser output has always been the goal of defense, industry and other fields. Fiber lasers have many advantages such as high output beam quality, high power, compact structure, etc., but due to the influence of nonlinear effects, thermal effects, unstable modes and other factors, the output optical power or energy of a single fiber laser is limited. [0003] In order to obtain a higher power laser with higher beam quality, it is necessary to obtain a laser output with higher power and better beam quality through multi-channel laser coherence synthesis, and in the array fiber laser coherence synthesis technology, the aperture filling method of multiple fiber lasers is particularly important. At present, the aperture filling array used in related technologies...

AI Technical Summary

Problems solved by technology

[0004] However, the regular hexagonal array arrangement with equal periodic distribution above will make the far-field output of the array laser coherently combined have side lobes that are easily detected, that is, the energy of the array laser will be partially dispersed to the side lobes, which is not conducive to improving the concentration in the far field. The proportion of energy within the main lobe of the field reduces the quality of the laser beam

Images