Semiconductor diode array side-pumped 2-micrometer laser module

Abstract

The invention relates to a semiconductor diode array side-pumped 2-micrometer laser module which belongs to the technical field of laser. The module comprises a semiconductor diode array, a 2-micrometer laser crystal, a semiconductor diode array heat sink, a laser crystal heat sink and a heat sink reflecting surface, wherein pump light output by the semiconductor diode array enters the 2-micrometer laser crystal and is absorbed by the 2-micrometer laser crystal, and unabsorbed pump light is reflected by the surface of the laser crystal heat sink, reenters the 2-micrometer laser crystal and is absorbed again; a high-reflection film to the pump light is plated on the reflecting surface of the laser crystal heat sink; and when in use, the reflecting surface and the 2-micrometer laser crystal are tightly packed and contacted, which not only carries out conduction cooling on the 2-micrometer laser crystal, but also reflect the unabsorbed pump light to the 2-micrometer laser crystal, thereby improving the absorption to the pump light of the 2-micrometer laser crystal so as to obtain 2-micrometer laser output with higher power.

Description

technical field [0001] The invention discloses a 2 μm laser module pumped by the side of a semiconductor diode array, belonging to the technical field of lasers. Background technique [0002] At present, the side-pumping module usually adopts a laser diode single tube or an array to surround a circle to side-pump the laser crystal. Under this structure, the laser crystal is mostly placed in a glass casing with a larger inner diameter than the laser crystal, and the gap between the two is filled with liquid for cooling the laser crystal. The pump light emitted by a semiconductor diode single tube or array needs to pass through the glass sleeve first, then through the cooling liquid, and then enter the laser crystal and be absorbed by the laser crystal. The unabsorbed pump light is transmitted to the laser crystal through the laser crystal. the other side. Most 2μm laser crystals, such as Tm:YAG, Tm:LuAG, etc., have poor absorption coefficients for semiconductor pump light (...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of weak absorption and low pump power density of the 2 μm laser crystal under the existing semiconductor pump module structure, thereby providing a method that can improve the absorption of the laser crystal and increase the pump power density in the laser crystal 2μm semiconductor laser array pump module

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