High-power optical fiber laser for anhydrous cooling heat capacity

Abstract

The invention relates to a high-power fiber laser for anhydrous cooling heat capacity. Hollow structures, heat-conducting strips, filling phase-change materials and airbags are arranged inside a substrate, wherein the heat-conducting strips adopting a deep groove structure is arranged between the hollow structures, and the resilient airbags are placed under the hollow structures; the phase-change materials in the solid state and the liquid state are different in density; when the phase-change materials change from the solid state to the liquid state in the process of heat absorbing, the volume of the phase-change materials increases, and the airbag is compressed to provide an extra volume; when the phase-change materials change from the liquid state to solid state in the process of heat releasing, the volume of phase-change materials decreases, and the airbag is expanded to compensate the volume loss; in the process of the volume changing of phase-change materials, the volume is buffered to guarantee a good contact between the phase-change materials and a heat-conducting base. When the laser is in operation, the heat is transmitted to phase-change materials through the heat-conducting strips. After reaching the phase-change temperature, the materials change in phase and absorb a large amount of heat, so as to realize the temperature control of a laser cavity and a pump device.

Description

technical field

[0001] The invention relates to a water-free cooling heat capacity high-power fiber laser, which belongs to the field of fiber lasers. Background technique

[0002] Compared with gas or conventional solid-state lasers, high-power fiber lasers have simple structure, excellent beam quality, high conversion efficiency, low threshold, and easy maintenance. They are widely used in communication, printing, marking, material processing, medical and other fields. In the past ten years, its output power has increased at an average annual rate of 1.7 times. At present, the highest single-mode output power of a single fiber has reached 10kW, and the highest output power of multi-mode lasers has exceeded 50kW.

[0003] However, while the output power of high-power fiber lasers is greatly increased, the heat generated on the laser cavity and pump source is also greatly increased, and the increase in device temperature has become a factor that needs to be considered in des...

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