laser-deep/wavelengths

The alexandrite laser at 755 nm is the workhorse wavelength for laser hair removal on Fitzpatrick I-III skin. It was among the first clinically successful hair-removal lasers, and despite three decades of competition from diode and Nd:YAG systems, it…

The diode laser at 800-810 nm is the middle child of the three primary hair-removal wavelengths and in practice the most versatile. Penetration is deeper than alexandrite but shallower than Nd:YAG; melanin affinity is moderate; the safety envelope extends…

Intense pulsed light is a xenon-flashlamp technology that emits a broad-spectrum pulse from roughly 500-1200 nm, filtered with interchangeable cut-off filters to restrict the output to the wavelengths desired for a given indication. For hair removal, a…

The long-pulsed Nd:YAG (neodymium-doped yttrium aluminum garnet) laser at 1064 nm is the longest-wavelength laser in routine hair-removal use and the gold standard for Fitzpatrick V-VI skin. At 1064 nm, melanin absorption is substantially lower than at 755…

The ruby laser at 694 nm was the first commercially successful hair-removal wavelength, introduced in the late 1990s after the Anderson & Parrish SPTL framework made targeted follicular destruction clinically feasible. It is now essentially obsolete for…

The tri-wavelength diode stack — simultaneous or rapidly-alternating 755 nm alexandrite-equivalent, 810 nm standard diode, and 1064 nm Nd:YAG-equivalent emission from a single handpiece — is the dominant premium-platform marketing story in laser hair…