Solid-state lasers have lasing material distributed in a solid matrix (such as the ruby or neodymium: yttrium-aluminum garnet "Nd-Yag" lasers). The neodymium-Yag laser emits infrared light at 1,064 nanometers (nm). A nanometer is 1x10-9 meters.
Gas lasers (helium and helium-neon, HeNe, are the most common gas lasers) have a primary output of visible red light. CO2 lasers emit energy in the far-infrared, and are used for cutting hard materials.
Excimer lasers (the name is derived from the terms excited and dimers) use reactive gases, such as chlorine and fluorine, mixed with inert gases such as argon, krypton or xenon. When electrically stimulated, a pseudo molecule (dimer) is produced. When lased, the dimer produces light in the ultraviolet range.
Dye lasers use complex organic dyes, such as rhodamine 6G, in liquid solution or suspension as lasing media. They are tunable over a broad range of wavelengths.
Semiconductor lasers, sometimes called diode lasers, are not solid-state lasers. These electronic devices are generally very small and use low power. They may be built into larger arrays, such as the writing source in some CD players and LASER printers.
The LASERS in use for the purposes of LLLT (Cold Laser) are the last category, which are Semiconductor LASER aka SLD such as Gallium arsenide (GaAs)of 904 nm and Gallium aluminium arsenide (GaALAS)of 780-890 nm and the other being LED or combination of the two aka Clusters.
The other types of LASERs are the other four mentioned in the previous blog.
Comments