What is the wavelength of an Alexandrite laser?

The Alexandrite laser operates at a wavelength of 755 nanometers. This specific wavelength is considered optimal for hair removal purposes, as it effectively targets the melanin in hair follicles while minimizing damage to surrounding skin. The 755nm wavelength has a good power penetration into the skin and is particularly effective for individuals with lighter skin tones, as it contrasts more effectively with the darker hair.

Furthermore, this wavelength allows for the selective photothermolysis principle to work efficiently. This principle states that specific wavelengths can selectively destroy targeted tissues (like hair follicles) without causing excessive damage to the surrounding skin. The Alexandrite laser’s specific properties, including its pulsed output and cooling features, make it a well-regarded choice within the realm of laser hair removal treatments.

Other wavelengths mentioned correspond to different types of lasers: 694nm is typically associated with the Ruby laser, 810nm is commonly associated with the Diode laser, and 1064nm is used by the Nd:YAG laser. Each of these lasers targets hair follicles effectively, but they do so at different efficiencies and with varying effectiveness based on skin type and hair color.