Compact middle and far infrared laser device

Abstract

The invention relates to the technical field of solid lasers, in particular to a compact middle and far infrared laser device which comprises a high-reflectivity mirror, a laser gain module, a polaroid, an input mirror, a nonlinear optical medium, a first output mirror and a second output mirror, wherein the high-reflectivity mirror, the laser gain module, the polaroid and the first output mirror are arranged in sequence and form a first laser resonant cavity; the high-reflectivity mirror, the laser gain module, the polarizing film, the input mirror, the nonlinear optical medium and the second output mirror are arranged in sequence and form a second laser resonant cavity; and the input mirror, the nonlinear optical medium and the second output mirror are arranged in sequence and form a third laser resonant cavity. Compared with the prior art, an optimized resonant cavity structure design is adopted, particularly, after high-power-to-2-micron polarized laser is generated through the Tm: YAG crystal, the OPO in the cavity generates medium and far infrared laser frequency conversion laser output, so that the device is compact in structure, small in occupied space and low in cost, and the output power is greatly improved.

Description

technical field [0001] The invention relates to the technical field of solid-state lasers, in particular to a compact mid-to-far infrared laser device. Background technique [0002] Mid-to-far infrared laser sources are widely used in the fields of material processing, medical treatment and detection. At present, the mid-infrared laser source is mainly obtained through ZnGeP 2 (ZGP for short) crystal frequency conversion (such as optical parameter OPO) generation, specifically, usually first use 790nm LD to pump Tm:YLF crystal to generate 1.9μm linearly polarized light, and then use the generated 1.9μm linearly polarized light to pump Ho:YAG The crystal generates 2.07μm laser, and then generates mid-infrared laser through the process of optical parametric frequency conversion. In the process of obtaining the above-mentioned mid-infrared laser source, the ZGP crystal used can only be pumped by lasers above 2 μm, and because of its many and complex physical processes, the ef...

AI Technical Summary

Problems solved by technology

In the process of obtaining the above-mentioned mid-infrared laser source, the ZGP crystal used can only be pumped by lasers above 2 μm, and because of its many and complex physical processes, the efficiency of the corresponding system is not high, and the practical performance of the system such as miniaturization is also limited.

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