Disc laser amplifier

Abstract

The invention discloses a disc solid laser amplifier which comprises two parabolic reflectors, wherein the two parabolic reflectors are coaxially placed in a conjugate mode so as to form a parabolic reflector set; the vertex of each parabolic reflector is provided with a disc laser crystal; a certain inclined angle is respectively formed between the normal lines of end faces of two disc laser crystals and the centre shafts of the corresponding parabolic reflectors, and the two inclined angles are not equal; pump light and seed laser are parallel to an optical axis and enter in a condensing cavity formed by the two parabolic reflectors of the reflector set respectively from a pump light inlet and a laser inlet on the parabolic reflectors; and after being reflected many times in the condensing cavity, the pump light and the seed laser are alternately converged on the two disc laser crystals, thereby realizing the multiple pumping on the two disc laser crystals and the multiple amplification on the laser. By using the disc solid laser amplifier disclosed by the invention, the pump beam absorption efficiency is high, an effect of carrying out efficient amplification on the seed laser can be achieved, and better beam quality can be maintained; and meanwhile, the disc solid laser amplifier is simple in whole system structure, and easy to install and debug.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to a disc laser amplifier. Background technique [0002] Laser technology has developed rapidly since the 1960s. At the same time, it has interpenetrated with other high-tech and has been widely used in many fields such as material processing, medical treatment, military affairs, measurement and scientific experiment research. Among them, solid-state lasers have the advantages of small size, light weight, low cost, and convenient use and maintenance. They have become a unique branch of the laser family and are rapidly developing in the direction of high average power, high beam quality, and high conversion efficiency. However, traditional rod-shaped solid-state lasers and rod-shaped solid-state laser amplifiers, due to the limitations of their side-pumped structures and cooling methods, lead to radial temperature field distribution inside the crystal, causing problems such as thermal...

AI Technical Summary

Problems solved by technology

Both of these two laser amplifiers have the following problems: the direction of the temperature gradient inside the laser crystal is perpendicular to the propagation direction of the amplified laser light, and the significant thermal lens effect will continuously deteriorate the quality of the amplified laser beam during the amplification process

However, in the mirror array, the angles of each mirror are different, so it is difficult to install and debug

During the amplification and propagation of the beam, the cross-sectional size is continuously increasing, and it cannot be guaranteed that it will match the pumping area of ​​the disk laser crystal during each amplification process

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