Laser conversion medium clamping device and laser

Abstract

The invention discloses a laser conversion medium clamping device and a laser. The laser conversion medium clamping device comprises a filling material and a cooling heat sink, a laser conversion medium is connected with the cooling heat sink through the filling material, and the cooling heat sink is provided with a mounting hole to correspond to the laser conversion medium. The laser conversion medium is mounted in the mounting hole, and the filling material is arranged between the laser conversion medium and the cooling heat sink. The laser conversion medium clamping device disclosed by theinvention has wide temperature range adaptability, when the temperature is greatly changed, the good and effective heat conduction between the laser conversion medium and the cooling heat sink can still be kept, and the phenomenon that the laser conversion medium is crushed due to thermal expansion and cold contraction, or the plastic deformation of the filling material cannot be recovered, is avoided, so that the device has a good heat management effect and environmental adaptability.

Description

technical field [0001] The invention belongs to the technical field of laser thermal management and environmental adaptability, and in particular relates to a laser conversion medium clamping device and a laser. Background technique [0002] There is a non-negligible thermal effect in high average power lasers. In order to ensure the normal output of laser parameters, it is necessary to dissipate heat from the laser conversion medium, the core heating component of the laser. Conduction heat dissipation is one of many heat dissipation methods, and it is suitable for applications that have high requirements on the volume and weight of lasers. The laser conversion medium that conducts heat dissipation needs to be clamped, and the clamping method has a serious impact on the thermal management effect and environmental adaptability. In the application field with a wide range of ambient temperature changes, if the clamping is not proper, the consequences will include poor heat dis...

AI Technical Summary

Problems solved by technology

In the application field with a wide range of ambient temperature changes, if the clamping is not proper, the consequences will include poor heat dissipation effect, laser cannot be output normally, large clamping stress of the laser conversion medium causes a large change in the polarization state of the laser, and laser conversion medium Broken and broken under the extrusion of thermal expansion and contraction of the clamping parts, etc.

[0003] At present, the clamping method used by lasers under laboratory conditions is generally a single filling material assisted heat conduction method, that is, a layer of soft and high thermal conductivity auxiliary material is added between the heat sink and the laser conversion medium, filled on the surface of the crystal and heat Between the sinking surface, it overcomes the problem of poor point contact heat transfer effect due to the roughness of the two. Since the linear expansion coefficient of the filling material is inconsistent with the crystal and the heat sink, this clamping method is only suitable for use with small changes in ambient temperature condition

When the ambient temperature changes greatly, due to the inconsistent linear expansion coefficients of the heat sink, crystal and filling material, the soft filling material will undergo plastic deformation under the repeated action of thermal expansion and contraction. When the linear expansion coefficient of the filling material is greater than that of the heat sink And crystal, when the ambient temperature is higher than the assembly temperature, the filling material is squeezed and thinned, and when the temperature returns to the assembly temperature, it will not be in good contact with the heat sink and the crystal, and the function of the filling material to assist heat transfer will be lost

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