Integral cooling device for high-power optical fiber laser or amplifier

Abstract

The invention provides a cooling device for a high-power optical fiber laser or an amplifier. The length of optical fibers arranged in the cooling device is variable, and the cooling device can cool a pump coupler arranged in the high-power optical fiber laser or the amplifier when cooling the optical fibers. The cooling device comprises a cooler pan and a heat conducting cover plate, wherein the cooler pan is a metal block provided with a flat surface; an input concave groove, a coupler concave groove, a helical line-shaped concave groove, a plurality of rewound concave grooves and a plurality of output concave grooves are engraved on the flat surface; the heat conducting cover plate is a metal block provided with a flat surface; and the flat surface of the heat conducting cover plate is not smaller than that of the cooler pan. When the integral cooling device for the high-power optical fiber laser or the amplifier is used, doped optical fibers can be returned to an adjacent former ring through the rewound concave groove when wound in the helical line-shaped groove, and the rewinding can be performed multiple times in the same rewound concave groove.

Description

technical field [0001] The invention relates to a cooling device, in particular to an integral cooling device for a high-power fiber laser or a high-power fiber amplifier. Background technique [0002] When the rare earth element-doped fiber is used in a high-power fiber laser or a high-power fiber amplifier, the doped medium in the fiber generates laser light under the action of pump light, and generates a lot of heat at the same time. If the heat in the fiber is not discharged in time, it will cause the temperature of the fiber to rise, resulting in a decrease in the quality and efficiency of the output laser beam; it will even affect the polymer used to protect the fiber at the outermost layer of the fiber, causing the polymer to age or even fail. It is directly related to the safe and stable operation of high-power lasers or amplifiers. [0003] At present, there are patent applications (Chinese patents: 200810048538.0 and 200820155746.X) and practical application devic...

AI Technical Summary

Problems solved by technology

[0003] At present, there are patent applications (Chinese patents: 200810048538.0 and 200820155746.X) and practical application devices for fiber cooling solutions in high-power fiber lasers or amplifiers, but these solutions or devices have the following disadvantages: (1) cooling devices can be placed The length of the optical fiber is limited, and optical fibers shorter or longer than a certain fixed length cannot be used; (2) The cooling device only provides cooling for the optical fiber, and cannot simultaneously provide cooling for another important component in the all-fiber system - the pump coupler , not convenient for modularization of high power fiber lasers or amplifiers

Images