High-power fiber output system with cladding light filtering function

Abstract

The invention discloses a high-power optical fiber output system with the cladding light filtering-out function. The system comprises an output tail fiber of a double-cladding optical fiber, an optical fiber end cap, a packaging clamp and a water cooling circulation assembly. A fiber core in the output tail fiber of the double-cladding optical fiber is connected with the optical fiber end cap in a fused mode, the fiber core and the optical fiber end cap are both packaged into the packaging clamp through glue, and a high-refractive-index material layer is arranged in the optical fiber end cap and used for absorbing cladding light diffused into the optical fiber end cap to form heat energy. The packaging clamp is connected with the water cooling circulation assembly, and the optical fiber end cap is cooled through the water cooling circulation assembly. The system has the advantages of being simple in structure, easy and convenient to manufacture, capable of improving cladding light filtering-out capacity and fiber core laser output bearing capacity and the like.

Description

technical field [0001] The invention mainly relates to the fields of fiber lasers and fiber amplifiers, in particular to a high-power fiber output system with cladding light filtering function. Background technique [0002] In recent years, due to the advantages of high conversion efficiency, good beam quality, compact structure, easy heat dissipation, and good working stability, fiber lasers have been widely used in many fields such as industrial processing, biomedicine, and national defense. With the maturity of double-clad fiber pumping technology and the improvement of fiber manufacturing process, the output power of fiber laser is also increasing. [0003] In fiber lasers and amplifiers using double-clad fiber pumping technology, it is necessary to filter the pump light and laser in the inner cladding of the double-clad fiber before outputting the fiber to improve the beam quality of the output light. The existing technology is to strip off a section of the coating lay...

AI Technical Summary

Problems solved by technology

Especially for the output end face of the optical fiber, due to the inevitable defects in the post-processing, it is easy to damage the end face and cause serious damage

On the other hand, when the laser propagates from the fiber output to the air, due to the difference in refractive index between the two, the return light caused by reflection will have a bad influence on the front-end laser structure, and at the same time accumulate heat load near the output end face, further Increase the possibility of damage at the fiber output end

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