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.
The Dye Laser is a Liquid Laser. Liquid lasers are those lasers which uses liquid as an active medium.
Definition of Microwave
Microwave is a kind of electromagnetic wave. In a broad sense, the microwave frequency range is from 300 MHz to 300 GHz.
Microwave Equipment Category
The CO2 stands for carbon dioxide. In CO2 laser the laser light takes place within the molecules of carbon dioxide rather than within the atoms of a pure gas.
At the lower mode of frequencies the oscillation and amplification is carried out by conventional wires and transistors networks. We can design the oscillator with the use of coil and capacitors.