CLASSIFICATION, WORKING MEDIUM AND APPLICATION OF UV LASERS

Gas UV lasers:
Gas UV lasers are mainly based on excimer laser technology. Xenon chloride (XeCl) lasers (wavelength of 308 nm) and fluorine (F2) lasers (157 nm) are two widely used excimer lasers. They are used for applications like micromachining, lithography, corneal ablation, electronics manufacturing etc.

Solid-state UV lasers:
Solid-state UV lasers use crystal or glass as the host material and pump the medium with a laser diode. They have a high efficiency, stable output and compact size. These are widely used for applications like marking, scribing, engraving, cutting and medical procedures.

Semiconductor UV lasers:
Semiconductor UV lasers use direct bandgap semiconductors to produce UV emission. They can be fabricated in arrays, leading to high powers, and they operate at room temperature. They are used in applications like data storage, chemical sensors, and biomedical imaging.

Applications of UV lasers:
UV lasers are widely used in various applications like:

- Micromachining and microfabrication in electronics manufacturing.
- Lithography in semiconductor fabrication.
- Medical procedures like corneal ablation, tattoo removal, and skin rejuvenation.
- Marking, scribing and engraving on different materials like plastics, metals and ceramics.
- Data storage in Blu-ray discs and other optical storage mediums.
- Fluorescence microscopy in biomedical imaging.
- Chemical sensing and spectroscopy.

UV laser processing has many advantages and is also the preferred technology for the development of scientific and technological information. First, the ultraviolet laser can output ultra-short-wavelength laser light, which can precisely process ultra-fine materials; secondly, the "cold treatment" of the ultraviolet laser will not destroy the whole of the material itself, but only treat the surface; it cannot effectively absorb visible light and infrared lasers, result in inability to process. The biggest advantage of UV light is that basically all materials have a broad absorption of UV light. UV lasers, especially solid-state UV lasers, are compact, small, easy to maintain, and easy to mass produce. UV laser are widely used in medical biological material processing, criminal case forensics, integrated circuit boards, semiconductor industry, low-light components, surgery, communications and radar, laser processing and cutting and other fields.

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