Cladding light filtering device for high-power optical fiber laser

Abstract

The invention discloses a cladding light filtering device for a high-power fiber laser. The device comprises one or more sections of double-cladding optical fibers. The double-cladding optical fibers can partially strip a protection layer and an external cladding in the laser output direction from the small stripping area to the large stripping area at intervals to enable an internal cladding to be exposed, the exposed internal cladding is coated with filtering materials, and the light filtering device is fixed to a heat dissipation metal material or a water cooling plate. According to the cladding light filtering device, the damage to an optical fiber structure is small, light filtering is even, the phenomenon that the temperature of some filtering points is excessively high in the non-even filtering process is avoided, and system stability is improved.

Description

technical field [0001] The invention relates to a fiber laser and a fiber amplifier, in particular to a device for filtering excess cladding light in a high-power all-fiber structure fiber laser. Background technique [0002] Since E Snitzer first described double cladding pumped fiber lasers in 1988, double cladding pumping technology has been widely used in the fields of fiber lasers and fiber amplifiers. In recent years, with the development of high-brightness laser diode pumping technology and large-mode field double-clad doped fiber manufacturing process, the output power of a single double-clad fiber laser has increased rapidly. As a new type of laser, fiber laser has the advantages of high conversion efficiency, small size, and good beam quality. It is the laser with the most development potential in the 21st century. High-power fiber lasers generally include two types: one is the direct oscillation type; the other is the laser amplification type. They all convert t...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a high-power fiber laser cladding light filtering device, the purpose of which is to effectively filter out redundant cladding light in the fiber laser, thereby solving the problem of realizing cladding light. Uniform filtering of layer light to avoid technical problems of excessive local temperature

Images