What is Laser
The term LASER is the acronym for “Light Amplification by Stimulated Emission of Radiation”, describing actually, the principal, which it is based on. In short to medium term, we have to do with what so called, “forced emission of radiation”. Laser in brief, is an amplifier of light.
Lasers were invented in the ’60s; however, Albert Einstein had set the theoretical bases much earlier in 1917, being first to define the meaning of “forced emission”.
A Laser is being consisted by a tube, which contains a gas mixture (Co2, Helium etc.) or a solid crystal (Nd:YAG, Nd:YLF etc.) placed between two mirrors, one of them partially permeable (95%). Laser radiation is being emitted when concentrated energy is applied to the tube; an electrical discharger is used to produce this concentrated energy.
Laser applications nowadays vary and they can be applied to several sectors; however, the main usages continue to be melting, vaporization and cutting.