Heat sink cooling method for series sector radial microchannel crystals of solid laser

Abstract

The invention relates to a radiating technology for laser diode end-face pumped solid laser crystals, in particular to a heat sink cooling method for series sector radial microchannel crystals of a solid laser. The solid laser comprises a laser crystal rod, and an upper metal block heat sink and a lower metal block heat sink both clamping the laser crystal rod, wherein a sector radial microchannel is arranged around a pumping end face of the laser crystal rod, and a water inlet hole and a water outlet hole form a water channel with the sector radial microchannel; the sector radial microchannel consists of an upper series sector radial microchannel layer and a lower series sector radial microchannel layer; the upper series sector radial microchannel layer is integrally welded with the upper metal block heat sink to form an upper heat sink, and the lower series sector radial microchannel layer is integrally welded with the lower metal block heat sink to form a lower heat sink. The invention provides a cooling method for the effective radiation of the end-face pumped solid laser crystals in the manner of series sector radial radiation, thereby realizing high-density heat consumption.

Description

technical field [0001] The invention relates to a heat dissipation technology for laser diode end-pumped solid laser crystals, in particular to a series fan-shaped radiation microchannel crystal heat sink cooling method for solid lasers. Background technique [0002] With the increasing power of the pumping source, the influence of the crystal thermal effect on the working performance of the laser diode pumped solid-state laser cannot be ignored. In the past ten years, crystal thermal effect has been extensively studied. It refers to the general term of thermal lens effect, thermal stress birefringence effect and end face deformation effect. Among them, crystal thermal lens effect has an absolute advantage, and it will converge the laser. The thermal stress birefringence effect affects the polarization state of the laser. If the thermal stress exceeds the range that the crystal can bear, it will cause the crystal to burst. Although the end face deformation effect accounts fo...

AI Technical Summary

Problems solved by technology

Due to the small size of the laser crystal and the energy injected from the end face, most of the heat loss is concentrated at the pumping end. Therefore, the heat loss of the crystal has the characteristics of high density and uneven distribution

Obviously, for this unevenly distributed high-density heat consumption, there is a bottleneck in using metal block heat sinks to achieve efficient heat dissipation. If the pumping power increases to a certain level, the laser performance will decline rapidly due to the inability to dissipate heat in time, and even catastrophic heat damage

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