What are the Different Types of Lasers?
There are three types of lasers: solid state, gas and liquid. While all work according to the same general principles, they are differentiated on the basis of the medium they employ to create the laser action. In solid state lasers, an electrical current pumps electrons into the laser medium – typically a semiconductor – exciting electrons that are fixed in the medium. Driven into higher energy states, a condition known as a population inversion, the excited electrons quickly decay back into lower energy states, releasing the excess energy as photons. Carefully positioned mirrors bounce photons hitting them at 90 degree angles back and forth, in turn stimulating other excited electrons to emit photons with identical wavelengths, directions of propagation, and polarizations; this is a process called amplification. Because the mirrors are of unequal reflectivity, the photons are eventually able to escape and their output constitutes the laser action. The first solid state semiconductor-b
There are many different types of lasers but the two most commonly used to treat wrinkling of the skin are the erbium and CO2 lasers. These lasers use ablation and heat to remove the top surface of the skin and stimulate the dermis to produce new collagen and skin. CO2 laser resurfacing has long been considered the gold standard for wrinkle correction of the face.
Subheading Contents Work Information Hot List Contact Information Current Projects Biographical Information Personal Interests Work Information SOLID-STATE LASERS-Having lasing material distributed in a solid matrix, e.g., the ruby or neodymium-yttrium aluminum garnet (YAG) lasers. The neodymium-YAG laser emits infrared light at 1,064 nanometers (nm). A nanometer is 1×10-9 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. EXIMER 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 or dimer is produced and when lased, produces light in the ultraviolet range. DYE LASERS-use complex organic dyes like rhodamine 6G in liquid solution or suspension as lasing media. They a
