The chief forms of lasers are solid state lasers, gas lasers and liquid lasers. A good, liquid, gas or semiconductor can act because the laser medium.
Solid state lasers are produced with hard materials like garnet or ruby. Solid state lasers are used 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 will 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 by which an electric energy is passed by way of a gas to make light. In the first 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 take advantage of liquid organic dyes. These emit a broad, continuous range of colors, mainly in the visible part of the spectrum. Dye lasers are excellent for applications by which a certain color is required Certified Lasers. Another laser source such as for example copper vapor laser can be used to excite the dye. Liquid lasers could be tuned over a broad range of wavelengths.
Excimer lasers are generated by using gases like fluorine and chlorine in combination with other gases such as for example krypton, argon or xenon. Excimer lasers are very helpful for the medical profession. To adjust the wavelength of the lasers compound natural dyes are utilized extensively.
Semiconductor lasers are usually tiny devices and use only low power. Semiconductor lasers may also be known 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 helpful for electronic devices like CD players, laser printers etc.