High power optical fibre laser device

Abstract

The disclosed high-power fiber laser device comprises: a large-caliber lens, a holder for a plurality of collimation lens with small caliber, a laser fiber holder with a flat plate contained a plurality of through holes every with a fixed fiber output port that all on same plane opposite to said small lens, and a fiber adjust frame to fix input port of an energy-transmission fiber; arranging the said laser fiber holder, lens holder, large-caliber lens and adjust frame on optical axis of large-caliber lens by turns; arranging every output port of fiber on focus of small-caliber lens and input end-face of said energy-transmission fiber on back focus of large-caliber lens respectively. This invention also has features of compact structure and usage flexibility.

Description

technical field [0001] The present invention relates to fiber lasers, in particular to a high-power fiber laser device that combines the outputs of multiple low-power fiber lasers into a high-power single-beam laser output. Background technique [0002] There are two existing technologies for realizing high-power fiber laser output: one is single-fiber end-face pumping, such as the University of Southampton in the United Kingdom, which uses a pump source of several thousand watts, and it is easy to generate a higher temperature at the end-face of the fiber. High power output can only increase the diameter of the fiber. As an optical fiber, the increase in diameter is limited. At the same time, increasing the diameter of the fiber will reduce the beam quality of the fiber laser output. The second is to splice multiple optical fibers to one optical fiber by a special method. Due to the limitation of the fusion splicing process, it can only be used on devices of the order of hu...

AI Technical Summary

Problems solved by technology

[0002] There are two existing technologies for realizing high-power fiber laser output: one is single-fiber end-face pumping, such as the University of Southampton in the United Kingdom, which uses a pump source of several thousand watts, and it is easy to generate a higher temperature at the end-face of the fiber. High power output can only increase the diameter of the fiber. As an optical fiber, the increase in diameter is limited. At the same time, increasing the diameter of the fiber will reduce the beam quality of the fiber laser output

The second is to fuse multiple optical fibers to one optical fiber through a special method. Due to the limitation of the fusion splicing process, it can only be used on devices of the order of hundreds of watts at present, and the output of the order of kilowatts cannot be achieved.

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