Device used for fiber laser and capable of filtering out cladding light

Abstract

The invention discloses a device used for a fiber laser and capable of filtering out cladding light. The device comprises a double-cladding energy transferring fiber, the double-cladding energy transferring fiber is composed of a fiber core, an inner cladding, an outer cladding and a coating from inside to outside in sequence, one or more sections in the middle of the double-cladding energy transferring fiber are filter-out sections with the coating and the outer cladding removed, at least one core-less fiber with the coating removed is arranged on the periphery of the inner cladding of the filter-out sections in the circumferential direction, the core-less fiber is parallel to the double-cladding energy transferring fiber in the axial direction, a glass sleeve tube is arranged outside the core-less fiber, all of the core-less fiber, the inner cladding of the filter-out sections and the fiber core are covered by the glass sleeve tube, and the outer surface of the glass sleeve tube is coated with a light guiding gel layer. The device used for the fiber laser and capable of filtering out the cladding light is simple in structure, fast and even in heat dissipation, good in safety and capable of effectively filtering out the cladding light in the fiber laser.

Description

Technical field [0001] The present invention involves the field of fiber -fiber laser, including fiber fiber oscillator and fiber amplifier, which specifically involves a device for optical fiber lasers and can be filtered into the packet layer light. Background technique [0002] Fiber laser is a laser that uses optical fiber as a gain medium. It obtains the laser output of the corresponding band by mixing different rare earth ions in the fiber matrix material.In recent years, with the development of high -brightness laser diode pump technology and large -scale dual -layer doped fiber -doping fiber manufacturing process, the output power of single -rooted double -layered fiber laser has increased rapidly.In 2003, Limpert and others at Jena University in Germany received 500W continuous laser.In 2004, Jeong et al., The University of Southampton, made 1.36kW laser output.Jeong increased the output power of the laser to 2.1kW by improving the optical fiber parameters and increasing...

AI Technical Summary

Problems solved by technology

[0003] At present, there are CN201234052Y (named "Pump and Drain Device for Double-clad Fiber Amplifier and Fiber Laser") and CN101718916A (named "Residual Pumping Device in Stripped Double-clad Fiber") about fiber laser cladding light filtering and cooling schemes. "Method of Light") and other Chinese patent documents have made relevant reports, but these devices only use a high-refractive index light-guiding adhesive layer, and the cladding light will be filtered out in a short length, resulting in local overheating , it is not easy to dissipate heat. When the accumulated heat reaches a certain level, the local part of the optical fiber may be burned due to the high temperature, which will bring disastrous consequences to the entire laser system.

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