Double-sided conduction cooling multi-sheet laser amplifier and system

Abstract

The embodiment of the invention provides a double-sided conduction cooling multi-sheet laser amplifier and a system. The amplifier comprises a laser head, a cavity and an external cold source, and thelaser head comprises a gain medium, a heat sink, a cooling metal, a first contact object and a second contact object. The gain medium and the heat sink are both sheet-shaped and are separately arranged in parallel at intervals, the cooling metal is arranged at the peripheries of the gain medium and the heat sink, and the cooling temperature is constant. The centers of the gain medium and the heatsink are coaxial, and the plane of the gain medium is vertical to the central axis. The edge of the gain medium is connected with the edge of the heat sink through the first contact object, and the edges of the two surfaces of the heat sink are connected with the inner wall of the cooling metal through the second contact object. The double-sided conduction cooling multi-slice laser amplifier andthe system provided by the embodiment of the invention have the advantages that the gain medium has no special requirements for gradual change, interval or gradient doping and the like, the cooling action process is simple, the structure is compact, and the heat dissipation effect is good, and the high-power output of a multi-slice laser is facilitated.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a double-sided conduction cooling multi-flake laser amplifier and a system. Background technique [0002] In order to meet the requirements of higher power laser output and compact structure, especially under the traction of laser fusion, high-power all-solid-state lasers based on multi-flake structures have received extensive attention. This structure adopts discrete multi-flake gain medium, which can provide high gain, and the waste heat in the medium can be effectively removed by low-temperature helium or direct liquid cooling to ensure the normal operation of the laser. [0003] In the prior art, for laser amplifiers cooled by low-temperature helium gas, lamination gain media with gradient and interval doping or gradient doping are mostly used, while liquid direct cooling of thin-film solid-state laser media is to directly immerse the thin-film gain medium into the cooling liq...

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Problems solved by technology

[0004] However, when low-temperature cooling is used, the gain medium mostly uses laminations with gradient and spaced doping or gradient doping, which undoubtedly increases the difficulty and complexity of the preparation of the gain medium; when direct liquid cooling is used, since the laser directly penetrates Supercooled liquid, the flow field characteristics, thermodynamic characteristics and various optical characteristics in laser oscillation are coupled with each other, making the action process complicated

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