Types of LASER:
In modern are vast varieties are present for LASER. Each and every type has its merit with some limitations. We can classify LASER in the form of solid, liquid, gas, or semiconductor. Lasers are commonly designated by the type of lasing material employed.
This kind of laser lasing material (material that atoms will go into upper energy level) is distributed in a solid matrix. Here lasing material crystal is usually a cylindrical rod mounted in an optical cavity those results in a simple versatile laser beam. The common members of the solid-state laser family are the ruby and neodymium laser. In solid-state lasers, light energy is used as a pumping source for lasing material atoms. Light sources such as flashtube, flash lamps, arc lamps, etc.
In a gas laser, an electric current is discharged through gas inside the laser medium to create a laser beam. The lasing material in the gas laser is in the gaseous state. Typically the lasing material is formed with a mixture of gases. This mixture is packed up into a glass bulb. The packed mixture of gases acts as a laser medium. A gas laser is the first laser that works on the principle of converting electrical energy into light energy. Gas lasers are used in applications that need a coherent and high-quality light beam.
Semiconductor lasers are the result of the invention of semiconductors. These lasers are playing important role in our daily life from your video player to LCD projectors. These lasers are very cheap, compact, and need less power for their functioning. Semiconductor lasers, also known as laser diodes, are different from solid-state lasers because in solid-state lasers light energy is used for optical pumping whereas in semiconductors laser electrical energy is used as the pumping source. Here a p-n junction of semiconductor diode forms the active medium or lasing medium.
The coherent and monochromatic nature of the laser light beam makes it super special. At present time the laser is being used in the medical field for surgeries and scanning, in industries for welding and cutting, in surveying and ranging equipment, in garment industries, in communication like optical-fiber communication, in heat treatment of metals, and more.
Thanks for reading. See you soon with another exploration!