Large-face pumping slab laser module capable of efficient cooling

Abstract

A large-face pumping slab laser module capable of efficient cooling comprises slab laser mediums, a transparent heat sink, a transparent cooling device and a semiconductor pumping source. According to the large-face pumping slab laser module capable of efficient cooling, the transparent heat sink high in heat conductivity and good in light transmission is bonded or manufactured on the large face of the solid slab laser mediums through optical cement, and the transparent cooling device is used for obtaining the large face of a slab laser and meanwhile serving as a cooling face or a pumping face so as to change the situation that for an existing large-face pumping slab module, only an upper surface and a lower surface can serve as a pumping face and a refrigerating face respectively, thermal gradient is easy to form in the longitudinal pump light direction due to single-surface refrigeration, output light beams are influenced, and quality of the light beams is not sufficient. The bonding or optical cement mode on the large face of the laser mediums is adopted for replacing the welding mode of the metallic heat sink so as to eliminate the stress on the laser mediums caused by welding, and therefore high-power and high-light-beam-quality laser output is achieved.

Description

technical field [0001] The invention relates to a solid-state laser, in particular to a high-efficiency cooling large-surface pumping slab laser module capable of obtaining high-power and high-beam-quality laser output. Background technique [0002] The all-solid-state laser pumped by semiconductor laser is a great innovation in the development of solid-state laser technology. It combines the advantages of high efficiency and long life of semiconductor lasers and good beam quality of solid-state lasers, and has been widely used. At present, solid-state lasers mainly include rod lasers, disk lasers and slab lasers. Among them, due to the large radial temperature gradient and severe thermal lens effect, rod lasers are difficult to achieve high beam quality while obtaining high-power laser output; disk lasers are difficult to achieve high-efficiency laser output due to thin disk thickness and low axial gain. ; The slab laser has high axial gain and high efficiency, and can re...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the large-area pumping scheme of the upper and lower surfaces of the existing solid slab laser. The upper and lower surfaces are respectively used as the pumping surface and the cooling surface. Cooling on a single surface is likely to generate thermal gradients in the longitudinal direction, which affects the output beam. Insufficient beam quality, use the method of bonding on the large surface of the lath laser medium or the method of transparent heat sink with high thermal conductivity and good light transmittance to replace the existing metal heat sink welding method, which can eliminate the impact of welding on the laser beam. The stress caused by the medium and the use of a transparent cooling device can realize the cooling of the two surfaces separately and reduce the thermal gradient generated in the longitudinal direction, thereby achieving high-power, high-beam quality laser output

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