Overview of Lasers

Abstract

LASER (Light Amplification through Stimulated Emission of Radiation) is one of the most outstanding inventions of the 20^th century. In contrast to common light sources, which emit incoherent photons at many frequencies, lasers generate coherent radiation at many wavelengths ranging from meter wavelength region to the soft X-rays region. Laser technology touches almost every aspects of daily life in the 21^st century. Due to remarkable features of lasers such as directionality, coherences, monochromaticity and high intensity; they are used in a wide variety of applications in all walks of life starting with communications to medicine. This <em>article</em> covers a general overview of ‘LASERS’ and its current applications.