Lasers

The letters in the word laser stand for Light Amplification by Stimulated Emission of Radiation. A laser produces a very narrow beam of light that is useful in many technologies and instruments. The light beams that are powerful enough to travel miles into the sky and cut through lumps of metal. A basic laser consists of a chamber known as the cavity which is designed to reflect infrared, visible or ultraviolet waves so that they reinforce each other. The cavity can contain either solids, liquids or gases.

The choice of the cavity material determines the wavelength of the output.

We can separate the characteristics of laser beam into four major categories as:

·    Superior Monochromatism

·    Superior Directivity

·    Superior Coherence

·    High Output