Vortex beam generation method based on helically arranged phase-locked fiber laser array

Abstract

The invention provides a method for generating vortex beams based on helically arranged phase-locked fiber laser arrays, using phase control technology to compensate the dynamic phase noise of the fiber laser array system, and stably controlling the phase difference between unit beams on the emitting surface to be 0 or Integer multiples of 2π; and arrange the unit beams of the emitting surface in the fiber laser array system in a helical shape, so that the optical path of the unit beams at different spatial positions on the emitting surface to the same spatial position on the target plane is different, so that the target plane can be used The interference of the light fields of the unit beams produces vortex beams. The present invention does not need to stably control the phase difference between the unit beams to a special value, but only needs to use the mature phase control method in the field of coherent synthesis technology to stably control the phase difference between the unit beams to an integer multiple of 0 or 2π, and adjust the optical fiber at the emitting surface The laser array is arranged in such a way that a vortex beam can be generated on the target plane.

Description

Technical field [0001] The present invention relates to the field of fiber laser coherent combining, more particularly to a light beam based on spiral vortex arrangement of phase-locked fiber laser array generation method. Background technique [0002] Fiber laser coherent synthesis is an important way to get high average power, high laser beam quality, broad application prospects in the fields of industrial processing, free-space optical communications, large scientific facilities, etc., have been widely attention of domestic and foreign researchers. In recent years, the field of fiber laser coherent synthesis has made many important advances research. Currently, fiber laser coherent combining of the combined power breaking the order of 10 kilowatts, the number of beam combining unit breakthrough path 100, are related work by the light beam control means effects the phase, the phase difference of the light beam is controlled to the brightest 0 or 2π integer multiple of the array...

AI Technical Summary

Problems solved by technology

Among the existing phase control methods of fiber laser coherent combining, many are not suitable for the application scenarios of vortex beam generation

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