Resonant cavity for frequency-selecting 355nm ultraviolet laser in optical fiber end surface pumping Brewster angle cavity

Abstract

The invention relates to a resonant cavity for a frequency-selecting 355nm ultraviolet laser in an optical fiber end surface pumping Brewster angle cavity. A front reflective mirror, a YVO4 crystal, an acousto-optic Q switch and a turning mirror are sequentially arranged along the 808nm pumping laser emergent direction; the 808nm pumping laser enters via the front reflective mirror and excites the YVO4 crystal so as to generate 1064nm laser; the 1064nm laser enters the turning mirror, and is refracted and reflected outside by the turning mirror; a three-frequency-multiplication LBO crystal is arranged in front of the emergent direction of the 1064nm laser which is refracted and reflected outside by the turning mirror; the 1064nm laser refracted and reflected by the turning mirror is refracted by the three-frequency-multiplication LBO crystal and then exits; and a two-frequency-multiplication LBO crystal and a rear reflective mirror are sequentially arranged in front of the exit direction of the 1064nm laser refracted by the three-frequency-multiplication LBO crystal. The resonant cavity is ingenious in structure and reasonable in design, the balance between the high output power and high light beam quality can be reached perfectly, and the laser output power and optical quality can be stabilized.

Description

technical field [0001] The invention relates to an ultraviolet laser, in particular to a resonant cavity for a frequency-selective 355nm ultraviolet laser in an optical fiber end-pumped Brewster angle cavity, belonging to the technical field of ultraviolet light generating devices. Background technique [0002] Laser is one of the major inventions in modern science and technology. Among them, the application value of 355nm ultraviolet laser in non-metal and precision processing is particularly prominent. The global demand for high-quality cold light source lasers is increasing, and the application fields are expanding. Obtaining an ultraviolet laser with excellent beam quality, single frequency, and long-term stable operation is of great significance to the precision processing industry and non-metal processing industry. Starting from the development of the laser industry and economic benefits, it is also the general trend. [0003] Ultraviolet laser is a short-wavelength,...

AI Technical Summary

Problems solved by technology

The resonant cavity structure commonly used in the prior art is difficult to meet the requirements of high output power and high beam quality at the same time, and the stability of the resonant cavity is not enough, which needs to be improved

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