Cooling device for high power laser metal pumping cavity

Abstract

The invention relates to a water cooling method and device for a high power laser metal pumping cavity, belonging to laser technique and the application field thereof. And the method determines cooling water to first make centralized cooling of working matter according to the heated absorbed by working matter, reflecting surfaces and pumping lamps and divides the cooling water flowing out from the working matter into two parts and makes the two parts synchronously cool top and bottom reflecting surfaces, makes the cooling water flowing out from the top and bottom reflecting surfaces cool the two pumping lamps, respectively and finally makes the cooling water flow out of the cooling system. And the device mainly comprises top and bottom bodies of pumping cavity which have similar structures and can connect with each other, where the cooling water flows in cooling devices arranged in the two bodies to cool the pumping cavity. And it has high sealing intensity and good stability.

Description

technical field [0001] The invention relates to a cooling device for a high-power laser metal pump cavity, which realizes forced cooling of the high-power laser pump cavity, and belongs to the field of laser technology and its application. Background technique [0002] The pump cavity is the heart of the lamp-pumped high-power solid-state laser, including: pump source, working substance, and coupling surface. Due to the extremely low efficiency of lamp-pumped lasers (total electro-optic efficiency 3%-7%), most of the energy injected into the pump cavity is converted into the internal energy of the pump source, working substance, and coupling surface, so tens of thousands of watts must be guaranteed For the long-term stability of electric power lasers, the cooling system in the pump cavity must be effectively designed. [0003] At present, there are two cooling systems for lamp-pumped high-power solid-state lasers: 1. Ceramic-pumped cavity lasers with full-cavity cooling. S...

AI Technical Summary

Problems solved by technology

This cavity type cools the working substance, the pump lamp and the reflective surface separately. The electrodes of the pump lamp are exposed outside the cooling circuit. The cooling water passes through the back of the metal reflective surface and cools the surface through heat conduction. It has a large cooling capacity and stable performance. It is quite reliable, but its disadvantage is that the same device (pump lamp, reflector) in the pump cavity is difficult to maintain consistency due to uneven cooling under the same working condition, and the uneven cooling of the device leads to the strengthening of the thermal effect of the laser, which not only reduces the output power and beam quality, but also greatly shorten the laser life

The mechanical processing is difficult and the mechanical assembly is complicated. Nowadays, the lamp-pumped high-power solid-state laser mostly adopts a single working substance and a double-pumped lamp structure, and its injected electric power is as high as 10,000 watts. existing problems

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