Most hair removal systems on the market fall into four categories: diode, alexandrite, Nd:YAG, and IPL. Each targets the pigment in the hair follicle a little differently, which is why the type you choose decides which patients you can treat safely and how fast you can work. This guide breaks down how each one works, the skin types it suits, and where a tri-wavelength platform like the HR-LASE™ (FG2000B) fits.
The short version: the three true laser wavelengths each do a specific job, and no single one covers every patient. IPL is a different technology altogether. Start with the distinction that matters most.
Laser vs IPL: the first distinction that matters
A laser emits one focused wavelength of light. That single wavelength is tuned to be absorbed by the melanin in the hair shaft, which heats the follicle and disables its ability to regrow hair. Because the energy is concentrated at one wavelength, the effect is precise and repeatable.
IPL, or intense pulsed light, is not a laser. It fires a broadband flash across many wavelengths at once, more like a very bright camera strobe than a focused beam. Some of that light reaches the follicle, but much of it scatters into surrounding tissue. IPL can give patients temporary relief from hair, but for long-term hair reduction the true lasers, diode, alexandrite, and Nd:YAG, deliver more consistent results. If a system is described as IPL, treat it as a different category with different expectations.
Rule of thumb: IPL reduces hair for a while. Lasers are the standard when patients expect lasting reduction.
Diode (808 nm), the modern workhorse
The diode laser, operating around 808 nm, is the most widely used wavelength in professional hair removal, and for good reason. It reaches to a useful depth, is absorbed well by follicular melanin, and works across a broad range of skin tones. It is the wavelength most single-laser offices standardize on, and it is the everyday workhorse for the majority of a typical patient book.
Modern diode systems also tend to be the fastest and most compact of the true lasers, which matters when you are treating large areas like backs and legs. Throughput, measured in how quickly the handpiece can cover an area, is often the difference between fitting a full schedule and running behind. The HR-LASE™ product page covers the specs, including repetition rate and spot size, in detail.
Alexandrite (755 nm), fast on lighter skin
The alexandrite wavelength, 755 nm, is strongly absorbed by melanin. That makes it fast and effective on lighter skin, Fitzpatrick I to III, and on finer or lighter hair that other wavelengths can struggle with. The same strong melanin absorption that makes it efficient on light skin is why it is used with more caution on darker skin, where surface pigment can absorb too much energy. In a practice with a lighter-skinned patient base, 755 nm is a valuable tool.
Nd:YAG (1064 nm), safe for darker skin
The Nd:YAG wavelength, 1064 nm, sits at the opposite end. It penetrates deeper and is absorbed less by surface melanin, which is exactly what you want when treating darker skin, Fitzpatrick IV to VI. Because it largely bypasses the pigment at the skin surface, it lowers the risk of burns and pigment change in patients that alexandrite cannot safely treat. Any practice that serves a diverse patient base needs access to 1064 nm to treat darker skin responsibly. Our companion guide on what 755, 808, and 1064 nm actually do goes deeper on the physics.
IPL, broadband light rather than a true laser
IPL earns its own mention because it is often marketed alongside lasers and priced below them. It has a place for some temporary hair reduction and for skin treatments outside hair removal. But for a practice building a hair removal service on the promise of lasting results, IPL sets a different patient expectation. Understanding that difference up front avoids the mismatch between what the device delivers and what the patient was sold.
Single-wavelength vs tri-wavelength platforms
Here is the practical problem. Each true wavelength does a specific job: 755 nm is fast on light skin, 808 nm is the versatile middle, and 1064 nm is the safe choice for dark skin. There is no perfect single laser for permanent hair removal. Many university and hospital settings solve this by owning three separate machines, an 808 nm diode, an alexandrite, and a 1064 nm Nd:YAG, so they can treat every skin type. Buying three separate single-wavelength systems can exceed $300,000, before you account for three service contracts and three sets of consumables.
A tri-wavelength platform combines all three in one unit. The HR-LASE™ delivers 755 nm, 808 nm, and 1064 nm from a single system, so one machine covers the range of hair and skin types that would otherwise take three, and it comes in under $50,000, well below the cost of buying three separate machines. It is FDA cleared for hair removal on all three wavelengths, 755 nm, 808 nm, and 1064 nm. Documentation available on request. For most independent practices, that consolidation is the difference between serving every patient who walks in and turning some away.
Which type fits your practice
Match the technology to your patient mix and your throughput needs:
- Mostly lighter skin, high volume: alexandrite (755 nm) is fast, but you will still want a plan for darker-skinned patients.
- Broad, everyday patient base: a diode (808 nm) covers the majority and is usually the fastest on large areas.
- Diverse skin types, including Fitzpatrick IV to VI: you need 1064 nm in the room, whether as a dedicated system or part of a platform.
- You want to treat everyone from one device: a tri-wavelength platform is built for exactly this, without three purchases and three service contracts.
If you are weighing specific systems against each other, the head-to-head comparison shows where the HR-LASE™ lands against the brand-name platforms on wavelengths, speed, and service model.