Why Laser?

CO2 - Nd:YAG Laser Technology

WhyLaser? Top

The great intensity of radiation accumulated in a Laser's focus point offers a multitude of applications in the field of material process and treatment, such as welding, cutting, perforation, surface process and metallisation.

The Laser beam's main advantages are the following:

  • Significant minimization of material deformation, since the temperature produced by the Laser in a specific process is usually lower than the temperature usually produced.
  • Ability to process in areas with difficult access.
  • Great process speed resulting to high production rate.
  • Easy automatization with computerized control of the head motion system, thus providing the ability to cut materials with high precision even when shapes are complex.
  • Avoidance of cutting instrument's wear.


CO2 - Nd:YAG Laser Technology Top

The most commonly used Lasers for industries are the CO2 Laser with a power from 30W up to 15kW and the Nd:YAG Laser with a power from 50W up to 500W.

(*) CO2
CO2 Lasers use a CO2, N2 and He mixture (N2 and He improve the Laser's efficiency).

They are excited by electrical means, namely the beam is produced when a relatively high intensity current (dc or impulsive) passes through the gas.
They are suitable for processes with metals or non-metallic materials (plastic, ceramic, glass). The most interesting application of a medium intensity CO2 Laser (500 W - 1kW) is the process of non-metallic materials (cutting and perforation of ceramics, microelectronics, cutting plastics, fabrics, wood, leather etc.).

Some of the most important high intensity CO2 Laser applications (1kW -15kW) can be found in the car industry.

(*) Nd:YAG (Neodymium Laser)
This is the most popular solid-state Laser type. The active medium is usually Y3Al5O12 crystal (called YAG Yttrium Aluminum Garnett) in which some of the Y3+ ions have been replaced by Nd3+.

Medium pressure Xe light bulbs (500-1500 Torr) or even high pressure Kr light bulbs (4-6 atm) are used for the excitation of Nd:YAG Laser.

The Nd:YAG Laser beam is significantly absorbed by metallic materials. Due to its low intensity it is more useful in the process of materials that require higher precision and the minimum possible heating (welding of relays and microelectronics, perforation of very hard materials such as diamonds and sapphires).