The long-pulse Alexandrite laser functions by emitting a specific 755nm wavelength that targets the pigment within hair follicles. This wavelength is characterized by its extremely high absorption efficiency in melanin, which allows it to generate intense thermal energy. This heat destroys the germ cells of the hair follicle, preventing future growth and serving as the core technology for high-efficiency hair reduction in light-to-medium skin tones.
The Alexandrite laser relies on the principle of selective photothermolysis, converting light energy into heat to destroy hair follicles without harming surrounding tissue. Because the 755nm wavelength is highly attracted to melanin, it is most effective on patients with lighter skin tones where there is a distinct contrast between the hair and the skin.
The Mechanism of Action: 755nm Wavelength
Selective Photothermolysis
The fundamental principle behind this technology is selective photothermolysis. The laser emits a specific wavelength of light that penetrates the outer layer of the skin (epidermis) to reach the hair follicle.
High Melanin Absorption
The 755nm wavelength utilized by the Alexandrite laser has an extremely high absorption rate in melanin. Because melanin is the primary pigment in hair, the laser energy is rapidly absorbed by the hair shaft rather than reflecting off it.
Thermal Destruction of Germ Cells
Once absorbed, the light energy converts into thermal energy (heat). This heat is contained within the follicle and effectively destroys the germ cells responsible for hair growth. This process ensures high average hair reduction rates.
Benefits Beyond Hair Reduction
Improvement of Skin Quality
Beyond removing hair, the procedure can lead to noticeable improvements in overall skin texture. Patients often experience a reduction in acne breakouts and a decrease in the severity of existing acne.
Correction of Skin Tone
The treatment helps prevent dark marks often caused by skin irritation (secondary pigmentation). By reducing hair and irritation, the laser contributes to a more even skin tone and smoother texture.
Understanding the Trade-offs
Suitability for Skin Tones
The Alexandrite laser's high affinity for melanin makes it the gold standard for light-to-medium skin tones. However, this same characteristic makes it less suitable for darker skin.
The Risk for Darker Complexions
Because the 755nm wavelength absorbs melanin so aggressively, it cannot easily distinguish between the melanin in the hair and the melanin in the epidermis of dark skin. This increases the risk of thermal burns or pigmentary changes in patients with high melanin concentrations.
Alternative for Dark Skin
For patients with very dark skin, the long-pulse Nd:YAG laser (1064nm) is the safer alternative. As noted in the supplementary data, the 1064nm wavelength has a lower melanin absorption rate, allowing energy to bypass the epidermis and safely target deep follicles without damaging the surface skin.
Making the Right Choice for Your Goal
- If your primary focus is maximum efficacy on light-to-medium skin: The 755nm Alexandrite laser is the superior choice due to its high melanin absorption and efficient destruction of follicle germ cells.
- If your primary focus is safety on dark or melanin-rich skin: You should avoid the Alexandrite laser and opt for the 1064nm Nd:YAG laser to minimize the risk of burns and scarring.
- If your primary focus includes overall skin rejuvenation: The Alexandrite laser offers secondary benefits, such as reduced acne frequency and improved skin texture, alongside hair reduction.
The long-pulse Alexandrite laser represents the optimal balance of power and precision for patients with lighter complexions, ensuring effective follicle destruction with secondary aesthetic benefits.
Summary Table:
| Feature | Alexandrite Laser (755nm) |
|---|---|
| Primary Mechanism | Selective Photothermolysis |
| Target | High Melanin Absorption in Hair Follicles |
| Best Skin Types | Light to Medium (Fitzpatrick I-IV) |
| Key Benefits | High Efficacy Hair Reduction, Reduced Acne, Smoother Texture |
| Primary Alternative | Long-pulse Nd:YAG (1064nm) for Darker Skin |
Elevate Your Clinic’s Results with BELIS Advanced Laser Technology
BELIS specializes in professional-grade medical aesthetic equipment designed exclusively for high-end clinics and premium salons. Our advanced laser systems, including precision 755nm Alexandrite, Diode Hair Removal, and Nd:YAG technologies, empower you to deliver superior, safe, and effective treatments for every skin type.
From high-efficiency hair reduction to body sculpting solutions like EMSlim and Cryolipolysis, our portfolio provides the versatility your business needs to thrive. Partner with BELIS to offer your clients the pinnacle of aesthetic care.
Contact our experts today to find the perfect system for your clinic!
References
- Navid Bouzari, Yahya Dowlati. Laser Hair Removal. DOI: 10.1097/00042728-200404000-00005
This article is also based on technical information from Belislaser Knowledge Base .
Related Products
- Diode Laser SHR Trilaser Hair Removal Machine for Clinic Use
- Diode Tri Laser Hair Removal Machine for Clinic Use
- Clinic Use IPL and SHR Hair Removal Machine with Nd Yag Laser Tattoo Removal
- Trilaser Diode Hair Removal Machine for Beauty Clinic Use
- IPL SHR+Radio frecuency machine
People Also Ask
- What are the disadvantages of diode laser hair removal? Key Limitations & Safety Risks Explained
- Which is better, an IPL or a diode laser? Unlock Precision for Permanent Hair Reduction
- What skin type is diode laser for? Safe Hair Removal for Light to Dark Skin
- What is the recommended frequency for SHR hair removal? Optimize Your Schedule for Smooth Results
- How effective is diode laser hair removal? Achieve Long-Term Hair Reduction Safely
