A fusion splicing device for double-clad optical fiber and quartz waveguide coupler

Abstract

The invention relates to the technical field of high-power fiber lasers, and provides a fusion splicing device for a double-clad fiber and a quartz waveguide coupler. The main purpose is to solve the technical problems that the refractive index of each part of the double-clad fiber is inconsistent, the thermal expansion will be inconsistent when it absorbs light, and the fusion will cause stress. The main scheme is to make the distance between the double-clad fiber and the quartz waveguide 1um; through the mirror to make the laser light at an angle of 10 0 The light enters the W reflector to form a "point-one-ring-two-ring" spot, and enters the reflective focus mirror; by adjusting the distance and angle between the reflective focus mirror and the W reflector, the spot-like spot with the highest brightness in the center can be covered The high-brightness area in the center of the fiber core; the first ring spot covers the low-brightness area; the second ring spot covers the inner cladding of the double-clad fiber, so that the laser spot irradiates the double-clad fiber and the quartz waveguide in a molten state, making the fiber advance 1um toward the quartz waveguide , the welding is completed.

Description

technical field [0001] This patent relates to a fusion splicing device for double-clad optical fiber and quartz waveguide coupler, specifically a high-precision laser core-to-core fusion splicing device for quartz waveguide coupler and double-clad optical fiber, ensuring that the seed laser and pump light Efficient coupling into the core and cladding. It relates to the technical field of high-power fiber lasers. Background technique [0002] With the development of high-power solid-state lasers, especially fiber lasers, fiber couplers that rely on imports are limited by the withstand power of foreign products. In order to further increase the power of fiber lasers and reduce costs, quartz waveguide couplers are used instead of fiber couplers. The structure of the fiber laser can be simpler, and the power increase has more potential. Therefore, it is of great significance to realize the precise core-to-core fusion splicing of the quartz waveguide coupler and the double-clad ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, due to the doping of the core of the double-clad fiber, the strength of the fiber at the center of the core is higher due to the doping at the center of the core, and because the strength of the inner cladding of the double-clad fiber is quite different from the strength of the core When irradiated by laser light, due to the inconsistent refractive index of each part of the optical fiber, the thermal expansion of the absorbed light will be inconsistent, resulting in stress

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