Winding device for active optical fiber and fiber winding method

Abstract

The invention discloses a winding device for an active optical fiber and a fiber winding method. The winding device for the active optical fiber comprises a heat dissipation disk, wherein the heat dissipation disk adopts a track structure, the inner wall of the heat dissipation disk is an inclined surface, a groove for winding the active optical fiber is formed in the inclined surface, and the adjacent groove parts are spaced by a certain interval. With the adoption of the winding device and the fiber winding method, heat of the active optical fiber can be better dissipated, besides, the optical fiber extends naturally in the winding process so as to avoid pressure stress caused by fixation by the aid of external force, meanwhile, the difference of inner and outer winding diameters of the optical fiber is small, high-order mode lasers are effectively filtered out, and near-fundamental-mode laser output with the high laser beam quality is obtained.

Description

technical field [0001] The invention relates to a winding device and a fiber winding method for active optical fibers, mainly used for high-power fiber lasers or fiber amplifiers. Background technique [0002] During the working process of high-power fiber laser or fiber amplifier, the doped ions in the active fiber absorb the pump light to excite the output laser of the corresponding wavelength. During the excitation process, a considerable part of the energy is generated in the fiber in the form of heat. In the fiber If the heat accumulated in the optical fiber cannot be dissipated in time, it will affect the stability of the output light and even burn out the optical fiber. At present, there are two main ways to coil the active optical fiber: one method is to coil the active optical fiber on a smooth aluminum plate, and realize the heat dissipation of the active optical fiber through the close fit of the optical fiber and the aluminum plate. In the process of coiling the...

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Problems solved by technology

[0002] During the working process of high-power fiber laser or fiber amplifier, the doped ions in the active fiber absorb the pump light to excite the output laser of the corresponding wavelength. During the excitation process, a considerable part of the energy is generated in the fiber in the form of heat. In the fiber If the heat accumulated in the battery cannot be dissipated in time, it will affect the stability of the output light and even burn out the optical fiber

At present, there are two main ways to coil the active optical fiber: one method is to coil the active optical fiber on a smooth aluminum plate, and realize the heat dissipation of the active optical fiber through the close fit of the optical fiber and the aluminum plate. In the process of coiling the optical fiber, it is easy to cause crossing and overlapping of the optical fiber to cause uneven heat dissipation. At the same time, it is difficult to fix the entire optical fiber reel after the optical fiber is coiled, and a certain compressive stress is likely to be generated at the fixing point, which affects the uniformity of the optical fiber heat dissipation; another One method is to coil the active optical fiber on a smooth cylinder or cone, avoiding the staggered overlap of the optical fiber during the coiling process, and realizing uniform heat dissipation of the optical fiber, but in order to ensure the tight combination of the optical fiber and the cylinder or Give the fiber a certain tension during the coiling process, and the internal stress of the entire fiber will affect the stability of long-term work

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