Glossary Definition

What is Lasing/What is Laser action?

(Light Amplification by the Stimulated Emission of Radiation) or Lasers are devices that create uniform coherent light. Many lasers deliver light in an almost-perfectly parallel beam (collimated) that is very pure, approaching a single wavelength. Laser light can be focused down to a tiny spot as small as a single wavelength.

Full Glossary