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355nm UV Laser

Aug 13, 2020

The first ruby laser came out in 1960, and my country developed the first laser in 1961. For more than 50 years, laser technology and applications have developed rapidly due to its excellent properties such as good color, strong directionality, good coherence and high brightness. Among them, all-solid-state lasers have become one of the most promising research fields in laser technology due to a series of advantages such as small size, long life, compact structure, and convenient maintenance.

As one of the current mainstream industrial lasers, solid-state ultraviolet lasers are widely used in various industries based on their various performance advantages. Due to their narrow pulse width, multiple wavelengths, large output energy, high peak power and good material absorption, etc. Features, and the ultraviolet laser wavelength is 355nm, which is a cold light source, which can be better absorbed by the material, and the damage to the material is minimal. It can achieve fine micromachining and special material processing that conventional CO2 lasers and fiber lasers cannot.

Principle of solid-state ultraviolet laser light output

紫外原理图

The laser must have the above three parts, the working material, the pump source and the optical resonant cavity, and the laser with solid laser material as the working material. The working substance undergoes population inversion distribution under the action of the pump source, and becomes an active substance, which has the effect of light amplification. Part of the amplified light is fed back to participate in excitation, and the resonant cavity oscillates, and laser light can be produced after certain conditions are met.

1. Working substance: At the core of the laser, only the substance that can achieve energy level transition can be used as the working substance of the laser.

2. Pump source: its function is to give energy to the working material, and to excite atoms from low energy level to high energy level of external energy. Usually there can be light energy, thermal energy, electric energy, chemical energy, etc.

3. Optical resonant cavity: make the stimulated radiation of the working substance go on continuously; accelerate the photon continuously; limit the direction of laser output.