What is the primary wavelength range used in laser hair removal?

The primary wavelength range used in laser hair removal is indeed between 600 nm to 1100 nm. This specific range is optimal for targeting melanin in hair follicles while minimizing the absorption by surrounding skin tissues. The wavelengths within this range, such as those utilized in devices like the diode laser (800-810 nm) and the Nd:YAG laser (1064 nm), are effective at penetrating the skin and heating the hair shaft without causing significant damage to the epidermis.

Lower wavelengths, such as in the range of 400 nm to 600 nm, are more absorbed by the upper layers of the skin and are not as effective for hair removal, as they do not penetrate deeply enough to reach the hair follicles. Higher wavelengths, such as those between 1100 nm to 1500 nm and 1500 nm to 2000 nm, might also not be suitable for this application because they aren't optimal for the specific target of melanin in hair.

This understanding of the wavelength's role is crucial for practitioners in selecting the appropriate technology to ensure effective and safe hair removal treatments.