Design method of semiconductor diode both-end pumping high power UV laser

Abstract

The invention provides a design method of a semiconductor diode double-end-pumped high-power UV laser, which comprises following steps: constituting a double-end-pumped laser crystal by using two semiconductor diodes; outputting a pumped beam with 808 nm; coupling the pumped beam by an aspherical optical coupling system and a lens to a laser crystal to generate a laser beam with 1064 nm; oscillating the laser beam in a resonant cavity consisting of five planar mirrors; modulating with Q switch; converting the modulated fundamental frequency light with 1,064 nm into a frequency-doubled light with 532 nm by a frequency-doubling crystal; mixing the unconverted fundament frequency light with 1,064 nm with the frequency-doubled light with 532 nm by a frequency-tripling crystal to obtain a UV laser with 355 nm; and outputting the UV laser from a surface of the frequency-tripling crystal cut by Brewster angle. According to the scheme, the laser cavity has the advantages of large mode volume, smaller laser spot at the frequency-doubling crystal, greatly reducing intracavity loss by cutting the frequency-tripling crystal with Brewster angle and high power laser output.

Description

technical field [0001] The invention relates to solid-state laser technology, in particular to a design method for a semiconductor diode double-end pumped high-power ultraviolet laser. Background technique [0002] Ultraviolet lasers have short output wavelengths, concentrated energy, and high resolution. The focus point can be as small as several microns, and they have broad application prospects in the fields of micromachining of precision materials, ultraviolet curing, and photolithography. Semiconductor diode-pumped ultraviolet lasers have many advantages such as good beam quality, good power stability, high reliability, convenient use, and small size. In recent years, the use of nonlinear frequency conversion technology to obtain high-power ultraviolet laser output has become a research hotspot in the field of laser technology. At present, the global demand for all-solid-state ultraviolet lasers is increasing, and the application fields are expanding. [0003] The rea...

AI Technical Summary

Problems solved by technology

At present, many colleges and research institutes in China have carried out research on high-power ultraviolet lasers, but they are still in the initial stage. So far, commercial ultraviolet lasers that can be used in industrial processing have basically not been developed. The demand for high-power ultraviolet lasers Basically rely on imports, domestic ultraviolet lasers larger than 5W are very rare, Han's Laser Company is in the forefront, Han's Laser Company successfully developed a semiconductor side-pumped 5W ultraviolet laser in 2006, and used in ultraviolet processing equipment, but the power is limited Stability and beam quality need further improvement

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