The principle forms of lasers are solid state lasers, gas lasers and liquid lasers. A great, 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 employed for detecting ecological pollution, in scientific researches and a great many 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 current is passed by way of 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 area of the spectrum. Dye lasers are excellent for applications by which a certain color is required Certified Lasers. Another laser source such as for instance copper vapor laser can be used to excite the dye. Liquid lasers may be tuned over a broad selection of wavelengths.
Excimer lasers are generated by using gases like fluorine and chlorine in combination with other gases such as for instance krypton, argon or xenon. Excimer lasers are very ideal for the medical profession. To modify the wavelength of the lasers compound natural dyes are employed extensively.
Semiconductor lasers are often really small devices and use only low power. Semiconductor lasers are also known as diode lasers. The writing sources in some CD players and in some laser printers are examples for this. Semiconductor lasers are very ideal for gadgets like CD players, laser printers etc.