Phase change cooling-based optical fiber cooling device for fiber laser

Abstract

The invention relates to a phase change cooling-based optical fiber cooling device for a fiber laser. The device comprises a cooling heat sink (1). An optical fiber groove (12) is arranged on the cooling heat sink (1). A gain optical fiber (13) of which the coating layer is removed is fixed in the optical fiber groove (12). The device is characterized in that the a phase change material (14) fillsaround the gain optical fiber (13) in the optical fiber groove (12) and completely wraps the gain optical fiber (13) in the optical fiber groove (12); a cooling water channel (11) is arranged insidethe cooling heat sink (1); and the cooling water channel (11) is located below the optical fiber groove (12). In addition to the functions of a conventional fiber optic cooling heat sink, the phase change cooling-based optical fiber cooling device of the invention has the functions of preventing sudden temperature change and enduring higher power. With the device adopted, the capability of a fiberlaser system to withstand high-power can be increased, the risks of sudden temperature change can be reduced, and the reliability of the system can be ensured.

Description

technical field [0001] The invention relates to an optical fiber cooling device for an optical fiber laser based on phase change cooling, which belongs to the field of lasers, and in particular relates to the technical field of optical fiber cooling in optical fiber laser technology. Background technique [0002] High-power fiber lasers have the advantages of high conversion efficiency, good beam quality, convenient thermal management, and compact structure, and are widely used in industrial processing, cutting, marking, welding and other fields. High-power fiber lasers rely on electrical energy to produce a high-brightness, focused laser beam, but generate a lot of heat in the process. Although the fiber laser has a large surface area and volume ratio, it can effectively dissipate heat at low power, but with the continuous increase of pump power, especially for Yb-doped 3+ For double-clad fiber lasers, if the temperature of the doped fiber increases, the number of thermal ...

AI Technical Summary

Problems solved by technology

The disadvantage of this cooling device is that, limited by the inherent properties of thermally conductive silicone grease, its thermal conductivity is usually low, far lower than that of conventional metals, resulting in the inability to conduct the heat absorbed from the surface of the optical fiber in time, and its thermal capacity It is not high enough to effectively store too much heat, resulting in a relatively high overall thermal load of the system, which seriously restricts the development of fiber lasers to higher power

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