What wavelength is associated with Alexandrite lasers?

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Study for the 40Hr Laser Hair Removal Apprentice Test. Learn with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What wavelength is associated with Alexandrite lasers?

Explanation:
Alexandrite lasers emit light at 755 nanometers. This near‑infrared wavelength is strongly absorbed by melanin in hair follicles, allowing targeted heating of the follicle while minimizing damage to surrounding tissue when the pulse is controlled. That makes it effective for hair removal, especially on lighter skin with darker, coarser hair, where melanin absorption is beneficial and penetration is well balanced. Other wavelengths listed belong to different laser systems: 810 nm is typical for diode lasers, 1064 nm is used by Nd:YAG lasers with deeper penetration and safer use on darker skin, and 900 nm is not a standard hair‑removal wavelength.

Alexandrite lasers emit light at 755 nanometers. This near‑infrared wavelength is strongly absorbed by melanin in hair follicles, allowing targeted heating of the follicle while minimizing damage to surrounding tissue when the pulse is controlled. That makes it effective for hair removal, especially on lighter skin with darker, coarser hair, where melanin absorption is beneficial and penetration is well balanced. Other wavelengths listed belong to different laser systems: 810 nm is typical for diode lasers, 1064 nm is used by Nd:YAG lasers with deeper penetration and safer use on darker skin, and 900 nm is not a standard hair‑removal wavelength.

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