Diode Laser vs Alexandrite: Which One Should You Choose for Hair Removal?
To understand how alexandrite and diode lasers work, let’s first clarify the principle of selective photothermolysis. Selective photothermolysis works by destroying “targets” in the skin without damaging surrounding tissue. A specific wavelength of laser light is aimed at a specific target — the laser beam locks onto the melanin pigment in the hair shaft and in the haemoglobin of the blood vessels supplying the follicle.
The more precise targeting of the laser beam delivers faster results. Typically, between 6 and 8 sessions are sufficient for permanent hair reduction.
- ALEXANDRITE LASER (755 nm)
The alexandrite laser operates at a wavelength of 755 nm, which falls in the red part of the visible light spectrum. This wavelength is strongly absorbed by melanin — making it highly effective at targeting dark hair. Because of this strong affinity for melanin, the alexandrite laser delivers excellent results on lighter skin tones with dark hair. It is particularly effective for fine and medium-thickness hair.
However, the high melanin absorption means it must be used with care on darker or tanned skin, as there is a higher risk of pigmentation changes. Modern alexandrite systems like the Candela GentleLase Pro — used at SATORI Clinics — incorporate dynamic cooling technology (DCD) to protect the skin surface and minimise discomfort.
- DIODE LASER (800–810 nm)
The diode laser operates at a slightly longer wavelength — typically 800–810 nm. This longer wavelength penetrates deeper into the skin, making it more effective at reaching hair follicles with deeper roots. The diode laser is considered more versatile across a wider range of skin types, including darker skin tones, as the longer wavelength is less aggressively absorbed by surface melanin.
Systems like the Soprano Titanium — used at SATORI Clinics — use SHR (Super Hair Removal) technology, delivering energy in rapid pulses to gradually heat the follicle without the sharp bursts associated with traditional lasers. This results in a virtually painless experience suitable for all skin types, year-round.
- WHICH ONE IS RIGHT FOR YOU?
The choice depends on your individual characteristics:
- Lighter skin + dark hair → alexandrite laser (GentleLase Pro) tends to give faster results
- Darker skin, tanned skin, or lighter hair → diode laser (Soprano Titanium) is the safer and more effective choice
- Men’s treatments (back, chest, shoulders) → diode laser is preferred due to deeper penetration
- Sensitive areas (face, bikini line) → both can work; comfort levels vary
At SATORI Clinics, we use both the Soprano Titanium (diode) and the Candela GentleLase Pro (alexandrite), allowing our specialists to tailor the treatment to your specific skin type, hair colour, and area being treated. During your free consultation, we’ll recommend the most suitable option for you.
