Laser-gathering cavity for solid laser

Abstract

The invention provides a laser-gathering cavity for a solid laser, belongs to the technical field of solid lasers, and relates to improvement on a laser-gathering cavity of an existing high-power lamp pumped solid laser. The laser-gathering cavity comprises a quartz rod (1), and a pumping lamp installation hole and a laser rod installation hole are formed in the inner portion of the quartz rod (1). The laser-gathering cavity is characterized in that a laser-gathering reflection coating is plated on the outer surface, except two end faces, of the quartz rod (1), and the laser-gathering reflection coating is divided into three layers which contain a diffuse reflection coating body (2), a silicon dioxide film (3) and a metallic reflection film (4) from inside to outside. According to the laser-gathering cavity for the solid laser, the reflection coating is high in reflectivity and small in thickness, so that the size of the laser-gathering cavity is reduced greatly; the diffuse reflection coating body is strong in high-temperature resistance and even in reflection; the laser-gathering cavity is simple in structure, convenient to process and strong in impact vibration resistance.

Description

technical field [0001] The invention belongs to the field of solid-state laser technology, and relates to the improvement of the light-gathering cavity of the existing high-power lamp-pumped solid-state laser. Background technique [0002] For high-power solid-state lasers, the higher the pump power, the greater the heat accumulation in the working substance, and the thermal lens, thermally induced birefringence and thermal focusing caused by the uneven temperature change of the working substance will distort the passing beam, resulting in The quality of the light beam decreases, and in severe cases, it will cause damage to the working substance or other optical components, resulting in the collapse of the system. Therefore, there is a contradiction between high output energy and high beam quality. On the one hand, high output energy will cause a decrease in beam quality; on the other hand, high output energy must be based on high beam quality. The method to solve this cont...

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Problems solved by technology

The disadvantages are: first, the reflectivity of the diffuse reflection layer is low, usually the thickness must be greater than 4mm, resulting in a relatively large volume of the light-gathering cavity; second, the high temperature resistance of the diffuse reflection layer is poor, resulting in a decrease in reflectivity and uneven reflection ; Third, the structure is complex and difficult to process; Fourth, the ability to withstand shock and vibration is poor

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