Laser diode pumping full-solid ultraviolet pulse laser

Abstract

This invention discloses a laser diode pump all solid state ultraviolet pulse laser, the pump light output by coupling optic fiber, the pump light focused the pump end face of laser crystal through pump end face membrane to form plane reflection mirror, the laser crystal generating excited fluorescent radiation after absorbing pump light energy, the fluorescent forming base frequency light beam by oscillation in resonant cavity, laser incident to plane concave mirror by plane reflection mirror through laser crystal, sound and light Q adjusting crystal, plane color separation mirror, sum-frequency crystal and double frequency crystal, the plane color separation mirror leading light from resonant cavity, the focusing by lens, refracting by quartz prism and leading out laser by ultraviolet reflection mirror. Said invention has compact structure, high average output pulse power and large adjustable range of pulse recurrent frequency etc advantages.

Description

technical field [0001] The invention relates to a laser, in particular to a laser diode pumped all-solid-state ultraviolet pulse laser. Background technique [0002] Ultraviolet pulsed lasers are widely used in many fields, such as electronic component packaging of VLSI in microelectronics technology, ultraviolet lithography of VLSI chips, high-density optical disc storage technology in IT industry, medical Ultraviolet laser knife, microfabrication of equipment, laser modification of engineering materials, such as: permanent cold marking of plastics, and three-dimensional rapid three-dimensional molding of resins, DNA genetic engineering in modern biology, application of biochip technology, agricultural biotechnology Breeding, improvement, exposure light source in the printing industry, laser nuclear fusion, etc. Therefore, the application of ultraviolet pulse lasers has a good market prospect. [0003] Gas ultraviolet lasers or lamp-pumped ultraviolet lasers are commonly u...

AI Technical Summary

Problems solved by technology

[0003] Gas ultraviolet lasers or lamp-pumped ultraviolet lasers are commonly used today. The gas ultraviolet lasers have problems such as huge equipment, low efficiency, short life, poor stability, and complicated maintenance operations; when the lamp pumps the laser gain medium, the absorption efficiency is low, obvious thermal effect

There have been reports in China on the use of external resonator sum frequency technology to generate ultraviolet pulsed lasers, but it is well known that the generation efficiency of frequency doubling outside the resonant cavity is low, which greatly restricts the generation efficiency of ultraviolet pulsed lasers

U.S. Patent U6002695 involves the use of laser diode array side-pumped laser crystal technology and a three-dimensional standing wave resonator structure. This resonator has disadvantages such as difficult adjustment and difficult control of the fundamental frequency optical mode.

U.S. Patent US2002080841 involves two laser diode lasers double-ended pumping laser crystals and the use of a four-mirror folded cavity structure, which not only increases the cost of the laser, but also increases the astigmatism in the cavity due to the two folds in the resonator. Generation Efficiency of Ultraviolet Pulsed Laser

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