Treatment deep dives Aug 28, 2026 · 3 min read

Alexandrite or diode laser: what’s the difference, and which to choose

Alexandrite lasers often get marketed as the more effective choice over diode—it’s one of the first questions patients ask at a consultation. Here’s what actually separates the two technologies, and why our clinic runs on the one it does

"Alexandrite is better than diode" is a line patients hear at nearly every hair-removal consultation, usually echoing another clinic’s marketing. Here’s what’s actual technology and what’s sales pitch—and why RE/FACE runs its hair removal on a diode device.

How alexandrite and diode lasers differ

The formal difference is wavelength. Alexandrite runs shorter, around 755 nm; diode runs at 808 nm—the exact wavelength RE/FACE’s Capello Luxe uses. But the underlying principle is the same for both: laser energy is absorbed by melanin inside the hair follicle and destroys it from within, without damaging the skin around it. These aren’t two different hair-removal methods—they’re two engineering answers to the same problem.

"Alexandrite is more effective"—myth or fact

Online, and at consultations at other clinics, alexandrite often gets pitched as the more advanced option—mostly because the technology is newer or pricier to buy. In practice, both laser types aim at the same physical target and, done properly, deliver comparable results.

Why RE/FACE runs on the diode Capello Luxe

Choosing a diode system meant choosing to cover more patients on a single device: it works across most skin types and suits both delicate areas and larger areas of the body. The Capello Luxe runs a 1,200 W diode module with a 15 × 15 mm spot—large areas like legs or the back clear noticeably faster than on devices with a smaller spot. Pulse width is adjustable from 2 to 100 ms, which lets your doctor tune settings to your skin type and hair coarseness instead of running one setting for every patient.

Comfort is a separate reason: the device runs three cooling circuits—water, Peltier, and air—and brings skin temperature down to −10 °C during the pulse itself. Most patients describe it as warm tingling, with no numbing needed.

So which laser should you choose

If you’re choosing between clinics rather than between devices in the abstract, the better question isn’t "which laser is better" but "who’s actually going to diagnose me and tune the settings to me." A device name in an ad is no guarantee of results without an exam, a test pulse, and a properly run protocol behind it.

Common questions

What’s the core difference between alexandrite and diode lasers?

Wavelength: alexandrite runs shorter, around 755 nm, diode runs at 808 nm—the wavelength RE/FACE’s Capello Luxe uses. Both work on the same principle: energy is absorbed by melanin inside the hair follicle and destroys it without damaging the skin around it. Different technology, same physics, same target.

Is it true that alexandrite lasers are more effective than diode?

No—that’s a common marketing myth. Hair removal results depend on accurate diagnosis, settings tailored to your skin type and hair, following the treatment protocol, and the provider’s experience—not the name of the device. Done properly, both laser types deliver comparable results.

Why does RE/FACE use a diode laser instead of alexandrite?

A diode system works across most skin types and suits both delicate areas and larger areas of the body—which meant a wider range of patients could be treated on one device. The Capello Luxe also has adjustable pulse width (2–100 ms) and three cooling circuits, which lets your doctor tailor settings individually instead of running one setting for everyone.

Does a diode laser work as well on darker skin as on lighter skin?

The device’s pulse width is adjustable across a 2–100 ms range, which gives your doctor room to tune settings for different skin types. But the final call on your settings, and on whether the treatment suits you, is made by your doctor after an exam—it’s not an automatic "suits everyone" rule.

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An article is no substitute for diagnostics

Your doctor will assess your skin and build a protocol around your goal—more precise than any general advice