Device and method for multi-optical-fiber high-speed rotating wiredrawing side face fusion beam combination

Abstract

The invention discloses a device and a method for multi-optical-fiber high-speed rotating wiredrawing side face fusion beam combination. The device comprises a heating furnace, a take-up reel and a chuck, and the chuck comprises a chuck main structure and at least two grippers used for fixing an optical fiber preform; the chuck main structure is of a rotating structure, and the grippers are arranged on the chuck main structure; and the heating furnace is arranged under the chuck. The integration of a pumping optical fiber and an active optical fiber is realized, the structure is stable, and the coupling efficiency is high; several kilowatts of laser power output is achieved through double-end two-way pumping; and a composite functional optical fiber has the advantages of high coupling efficiency, simple structure, high stability and high manufacturing repeatability.

Description

technical field [0001] The invention relates to the technical field of optical fiber devices, in particular to a multi-fiber high-speed rotating wire drawing side fusion bundle device and method. Background technique [0002] Since its inception, fiber lasers have been widely used in civil industries and The military field has become one of the research hotspots in various countries and is progressing rapidly. In 2009, IPG reported that the continuous output power of single-mode fiber laser had reached 10kW. In recent years, many domestic units have also achieved power output above kilowatts. [0003] At present, high-power fiber lasers and fiber amplifiers use double-clad doped fibers, and the pumping light enters from the cladding for efficient pumping. In order to obtain high-power laser output, how to efficiently couple the pump light to the inner cladding of the active fiber is a key core technology that must be broken through in the research of fiber lasers. [0004...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems that the existing side pump coupling technology is difficult to realize the low coupling efficiency and complicated process of combining optical fibers, the purpose of the invention is to provide a multi-fiber high-speed rotary drawing side melting The purpose of the fusion beam device and method is to effectively realize the integration of the pumping optical fiber and the active optical fiber, and the active optical fiber and the pumping optical fiber are fused along the side, and the heat generated by injecting the pumping light is evenly distributed, which can realize kilowatt The second purpose is to make the bundled fiber with simple process. When the fiber is drawn, it can be rotated at high speed to melt the fiber bundle along the side along the axial direction, and the coupling efficiency of the prepared fiber is higher. , more stable, can achieve high-power laser output and bidirectional pumping

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