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What’s the Wavelength of Diode Laser?
Home / Sev Beauty Questions Answered / What’s the Wavelength of Diode Laser?

What’s the Wavelength of Diode Laser?

Diode lasers operate over a wide range of wavelengths, which vary based on their intended use and the type of semiconductor involved. These lasers find applications in numerous industries, from medical procedures to telecommunications, thanks to their adaptability.

In the context of laser hair removal, diode lasers usually work at wavelengths between 800 and 810 nm. This specific range effectively targets melanin in hair follicles while being relatively safe for individuals with light to medium-dark skin tones. The energy from the laser is absorbed by the pigment in the hair, producing heat that damages the follicle and inhibits regrowth.

However, while diode lasers can be effective, many professionals prefer Nd:YAG (1064 nm) and Alexandrite (755 nm) lasers for their superior precision, efficiency, and safety across various skin tones. Research indicates that these alternatives often yield more dependable long-term results.

Comparing Laser Wavelengths

Each type of laser has its own benefits, primarily determined by its wavelength and its interaction with melanin. Studies show the following differences:

Nd:YAG Laser (1064 nm) – This laser is particularly suitable for darker skin tones (Fitzpatrick IV-VI). Its longer wavelength penetrates deeper into the skin, bypassing surface melanin while still reaching the hair follicle. Studies show that Nd:YAG lasers can achieve up to 75% long-term hair reduction, with some cases reporting as much as 90% reduction in underarm treatments.

Alexandrite Laser (755 nm) – This laser is best for lighter skin tones (Fitzpatrick I-III) as it absorbs melanin effectively, making it very efficient for targeting hair follicles. It also allows for quicker treatment sessions. Research has demonstrated that Alexandrite lasers can achieve up to 85% long-term hair reduction, with some areas showing up to 96% reduction after just three sessions.

Diode Laser (800-810 nm) – Although diode lasers are frequently used, their results can be less consistent compared to Alexandrite or Nd:YAG lasers. Studies indicate that diode lasers typically provide 50-70% long-term hair reduction, often requiring more sessions to reach comparable results. Additionally, they may pose a higher risk of burns on darker skin due to their interaction with melanin.

Why Wavelength Selection Matters

The wavelength of a laser determines how well it can target hair follicles while keeping the skin safe. A wavelength that is too short may cause irritation or burns on darker skin, while one that is too long may not be as effective on lighter skin.

That’s why SEV Laser hair removal treatments exclusively use advanced, FDA-approved dual-wavelength technology—the Candela GentleMax Pro and Cynosure Elite IQ. These industry-leading systems allow us to customize treatments based on skin type, ensuring maximum effectiveness and safety for every client.

By combining top-tier laser technology with expert care, SEV provides a smoother experience in fewer sessions, helping you achieve long-lasting results with minimal hassle.

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Icon clock 10 Mar, 2025

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