Mostly the laser is not used by itself but rather, it is combined with a number of accessories and used as part of larger system.
There are four essential or basic components of laser, may be listed as:
He-Ne stands for Helium-Neon. The He-Ne laser active medium consists of two gases which do not interact form a molecule. Therefore He-Ne laser is one type of atomic gas lasers.
The first working laser was built in 1960 by Maiman, using a ruby crytal and so called the Ruby laser.
The gallium Arsenide laser is designed in such a way that a piece of N-type Gallium Arsenide material is taken and a layer of natural gallium aluminum arsenide material is pa
The semiconductor laser is very small in size and appearance. It is similar to a transistor and has the operation like LED but the output beam has the characteristics of laser light.
The lasers having the solid material as an active medium is called the solid state lasers. Generally there are two classes of solid state lasers.
From design point of view we can say that output of all lasers is not constant. Different types of applications require different types of lasers.
The actual process that occurs during the production of a beam of laser light is known as lasing process. The action which generates the laser light takes place within few nanoseconds.
The word LASER stands for light amplification by stimulated emission of radiation.
The inverse square law is common law of physics related to light discussion. The inverse square law states that
There are following methods of cavity resonator excitation.