Varieties of Lasers.
The chief forms of lasers are solid state lasers, gas lasers and liquid lasers. A good, liquid, gas or semiconductor can act while the laser medium.
Solid state lasers are produced with hard materials like garnet or ruby. Solid state lasers are useful for detecting ecological pollution, in scientific researches and a number of other applications. Solid state lasers have laser emitting materials arranged in solid matrix. Examples for solid state lasers would be the ruby or neodymium-Yttrium Aluminum Garnet (YAG) lasers. The lasing materials are pumped with flashlights, making the laser give either pulsed or continuous beam of light.
Gas lasers are lasers where an electric energy is passed through a gas to create light. In the early days gas lasers used a mix of helium and neon with carbon dioxide. At present gas lasers can use more strong and volatile mediums like hydrogen and fluorine. Gas lasers have great military applications. The cutting of hard materials becomes easy through gas lasers.
Liquid lasers or dye lasers make use of liquid organic dyes. These emit a broad, continuous selection of colors, mainly in the visible the main spectrum. Dye lasers are excellent for applications where a specific color is required Certified Lasers. Another laser source such as for example copper vapor laser is used to excite the dye. Liquid lasers can be tuned over a broad selection of wavelengths.
Excimer lasers are generated by using gases like fluorine and chlorine in conjunction with other gases such as for example krypton, argon or xenon. Excimer lasers are very ideal for the medical profession. To adjust the wavelength of the lasers compound natural dyes are used extensively.
Semiconductor lasers are generally really small devices and use only low power. Semiconductor lasers may also be referred to as diode lasers. The writing sources in a few CD players and in a few laser printers are examples for this. Semiconductor lasers are very ideal for gadgets like CD players, laser printers etc.