High-power and high-roundness industrial laser

Abstract

The invention relates to a high-power and high-roundness industrial laser, in particular to a high-power and high-roundness industrial laser. The high-power and high-roundness industrial laser comprises a laser cavity rear cavity mirror, a laser working medium, a pump laser diode, a Q switch, a spectroscope, a frequency doubling crystal, a frequency tripling crystal, a resonant cavity mirror, a laser fundamental wave 1 / 2 wave plate turning mirror and a synthesis mirror. Compared with the prior art, the laser has the beneficial effects as follows: (1) the reliability of the ultraviolet laser isrealized; (2) the stability of the ultraviolet laser is realized; and (3) the light spot roundness of the ultraviolet laser is improved.

Description

technical field [0001] The invention relates to an industrial laser, in particular to a high-power, high-circularity industrial laser. Background technique [0002] Ultraviolet laser has short wavelength, small focused spot, and high photon energy. It directly destroys the molecular bonds of many non-metallic materials during material processing to achieve "cold" processing, with smooth material edges and small carbonization. [0003] The diode-pumped 355nm ultraviolet laser has many advantages such as good beam quality, high efficiency, good power stability, high reliability, convenient use, and small size. Wide range of applications. [0004] The high-power (>8W) 355nm ultraviolet laser pumped by the diode is doubled by the fundamental frequency infrared laser with a wavelength of 1064nm inside or outside the cavity, and then part of the fundamental frequency is corresponding to the 532nm green light generated by the doubled frequency. The way triple frequency (ie sum...

AI Technical Summary

Problems solved by technology

But in this way, the position of the adjusted crystal has changed again. When adjusting one degree of freedom, it will affect the other two degrees of freedom. It is always difficult to adjust the crystal to the best position and fasten it, which is very cumbersome and time-consuming.

At the same time, because the same crystal mounting base is shared, the adjustment for one crystal will affect the other crystal, and it often takes repeated debugging to achieve the effect, wasting a lot of time

The technical solution disclosed in this utility model has complex structure and cumbersome operation

Not conducive to large-scale industrial application

[0009] figure 2 One of the existing ultraviolet lasers is disclosed, in which 010 and 030 are laser resonant cavity mirrors, and 010 is a high-reflection mirror for the laser fundamental wave. The advantage of this design is that it is simple and direct, and the disadvantage is that the triple frequency crystal 017 has an ultraviolet power exceeding 5w When it is above, it is easy to be damaged (especially the anti-reflection coating at the upper end), and the working life is short

In some designs, the ultraviolet emission surface of the triple frequency crystal is made into a Brewster surface, and the dielectric film is no longer used, but the destruction phenomenon of the Brewster surface under the ultraviolet laser power will still occur.

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