Coherent combination of high-power fiber laser full optical fiber structure and high brightness beam controlling method

Abstract

The invention discloses a coherent combination of a high-power fiber laser full optical fiber structure and a high brightness beam controlling method. The method includes that firstly a laser is in a multiple-path single mode auxiliary laser beam combined structure, an auxiliary light source in each path is amplified, and one of phase modulating devices is arranged in each path and can achieve a phase locking function to achieve a stable output of optical fields; then an optical fiber beam combiner is used for performing a beam combination of multiple-path amplified lasers into a transmitting energy fiber, and the transmitting energy fiber is utilized to achieve high power output of the lasers; and by means of an optimization type self-adaptive optical system, emergent multi-mode lasers are purified at an output end of the transmitting energy fiber. According to the method, a novel structure is utilized to step by step achieve high power and high brightness outputs of the fiber laser, thereby requirements of traditional coherent combinations for auxiliary light beam space splicing are met, problems that instability of a system, poor qualities of multi-mode fiber laser beams and the like are solved, the brightness of output lasers of the fiber laser is effectively improved, simultaneously the full optical fiber structure is achieved, the proven single mode fiber laser technology and light beam purification technology are fully utilized, the system structure of a high power fiber laser is simplified, and the system cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, in particular to a new method capable of realizing high-brightness output of fiber lasers with all-fiber structures. This method proposes a new structure of high-power fiber laser coherent combination, uses active phase control and adaptive optics technology to control the beam of high-power fiber laser, and can realize high-brightness fiber laser output with an all-fiber structure. Background technique [0002] Fiber lasers have the advantages of high conversion efficiency, good beam quality, convenient thermal management, and compact structure, and have developed rapidly in recent years. Compared with traditional solid-state and chemical lasers, fiber lasers are simple in structure and easy to manufacture and maintain, making them widely used in industrial fields such as remote welding and three-dimensional cutting, and also have good applications in the field of national defense and milit...

AI Technical Summary

Problems solved by technology

Coherent combination of all-fiber structure and beam purification of coherent combined beams have never been reported before the present invention

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