Understand the science behind laser wavelengths in aesthetic treatments. Learn how different wavelengths affect skin, hair, and tissue for optimal treatment selection.
Laser wavelength is the distance between two consecutive peaks of a light wave, measured in nanometers (nm). It determines the color of the laser light and how it interacts with different tissues in the body.
Different wavelengths penetrate the skin to different depths and are absorbed by specific chromophores (light-absorbing molecules) like melanin, hemoglobin, and water. This selective absorption is the key to effective laser treatments.
Understanding the electromagnetic spectrum and laser wavelengths used in aesthetic treatments
The most frequently used laser wavelengths in aesthetic treatments
How different wavelengths are absorbed by various chromophores in the skin
Absorbs light in the visible and near-infrared spectrum. Higher absorption at shorter wavelengths.
Target: Hair follicles, pigmented lesions, tattoos
Absorbs light in the visible spectrum, with peaks in the green and yellow range.
Target: Blood vessels, vascular lesions, rosacea
Absorbs light in the mid to far infrared spectrum, with peak absorption around 10,600nm.
Target: Skin resurfacing, cutting, ablation
How to choose the right wavelength for specific treatments and skin types
Important safety factors when selecting laser wavelengths
Different wavelengths are safer for different skin types. Darker skin requires longer wavelengths to avoid burns.
Shorter wavelengths penetrate less deeply, reducing risk of damage to underlying structures.
Proper wavelength selection ensures energy is absorbed by target chromophores, not surrounding tissue.
Using the wrong wavelength can cause burns, scarring, or ineffective treatment.
Too much energy at any wavelength can cause tissue damage and adverse effects.
Incorrect skin type assessment can lead to inappropriate wavelength selection.
Explore our comprehensive guides to laser technology and aesthetic treatments.