Each laser used for laser hair removal treatments works by emitting a wavelength of high-energy light that is measured in nanometers (nm). The light targets certain areas of the skin, emitting a specified level of heat, depending on skin type and desired results. An alexandrite laser uses an alexandrite crystal, which is a rare crystal that is one of the hardest found in nature—second only to diamonds and corundum, such as rubies and sapphires.
When used in a medical laser, alexandrite crystals produce a wavelength measured at 755 nm. Considered a red-light laser, alexandrite lasers work through the process of photothermolysis. This is the process in which heat is produced through a source of light. Also available with Q-switch mode, the alexandrite 755 nm lasers are known for their precision and ability to target hair follicles or the ink of a tattoo without damaging the surrounding skin.
An alexandrite laser differs from others because it produces a different wavelength of light, 755 nm, which makes it safe and effective for all skin types and colors. Other lasers emit different wavelengths of light that are only safe for certain skin colors and types, making alexandrite lasers the best choice for laser hair removal. It has been proven to be effective even for those who have extremely light hair and sensitive skin, and it holds a clearance rate of approximately 70 percent after the recommended number of treatments are complete.