UV

UV laser

UV lasers have the lowest wavelength of laser radiation. They use a basic source of solid-state lasers (Nd:YVO4, Nd:YAG, etc.). The infrared light output passes through several optically nonlinear crystals that further modify the parameters of the original infrared light.

Passage through such a crystal produces a 2nd harmonic of half wavelength (532nm) from the original laser radiation with a wavelength of 1064nm. As it passes through other crystals, the harmonics may continue to increase and the wavelength decrease accordingly. In practice, the 3rd harmonic (355nm) is most commonly used in UV lasers, but 4th or 5th harmonics (266nm and 213nm) can also be encountered.
Each time the beam is converted to a lower wavelength, its power decreases, and the overall efficiency of the UV laser is dependent on the number of conversions, which is why UV laser powers are in the range of only a few units of W.

Infrared and visible radiation accompanies the thermal influence of the material, which causes melting, evaporation and overall degradation. UV radiation has very little thermal effect, so it is often referred to as cold ablation – i.e. evaporation of the material without significant thermal effect on the material.

The great advantage of the UV laser is the excellent beam quality and the extremely small spot size, which is directly proportional to the wavelength size.
UV lasers are used in a narrow range of specific applications, which is also due to the relatively high acquisition and maintenance costs. This is because the nonlinear optics are subject to considerable thermal stress, degrade gradually and due to their lower lifetime need to be replaced after a certain period of time.

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Applications using UV lasers

  • micro-lithography (production of semiconductor chips, printed circuit boards and other electronics),
  • marking of materials transparent to infrared and visible light,
  • High precision cutting, drilling and other micro-processing of a wide range of very thin materials.

We can demonstrate most of the technologies we offer live or make samples.

We can help you expand the capabilities of your facility to suit your needs.

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