Alexandrite Laser: A Powerful Tool in Medical Aesthetics
Posting Date：2026-02-05
Alexandrite Laser
Alexandrite crystal (Alexandrite, Cr³⁺:BeAl₂O₄), also known as chrysoberyl, color-change stone, or alexandrite, is a high-performance broadband tunable laser gain medium. It can be pumped by a xenon lamp or a diode, with a wavelength tuning range of 701–858 nm. Ultraviolet laser output can be obtained through single-pass frequency doubling. It is widely used in laser medical aesthetics and other fields.
Hair Removal:
The alexandrite laser emits energy at a wavelength of 755 nm, which lies entirely within the absorption spectrum of melanin, as shown in the figure below. Since melanin is the target chromophore for hair removal, this makes the laser an effective device for hair removal.
· The 755 nm alexandrite laser is currently recognized as an effective hair removal laser (suitable for Fitzpatrick skin types I–V).
· It can be used for hair removal on any body area, including the underarms, bikini line, face, neck, back, chest, and legs.
· Most reports indicate that alexandrite lasers are effective for hair removal in skin types I to IV. For lighter hair, alexandrite is superior to Nd:YAG systems and is generally found to cause less pain than Nd:YAG.
Vascular Lesions
· Targeting red pigments (hemoglobin). Includes facial and leg telangiectasias, and certain vascular birthmarks (capillary malformations).
· Vascular disorders: hemangiomas, telangiectasia, rosacea.
Tattoo and Pigment Removal
· Improvement in aging skin appearance. The use of Q-switched Alexandrite lasers enhances the removal of blue and green pigments in particular.
· Indications include age spots, freckles, flat pigmented birthmarks (congenital melanocytic nevi), Ota nevus, and acquired dermal melanocytosis.
Photoacoustic Imaging
Generates high-resolution volumetric images of tissue by measuring photo-induced acoustic waves originating from its optically absorbing structures. Combines the advantages of optical excitation and acoustic detection, providing a unique combination of high molecular-specific contrast and fine spatial resolution. Implementations range from microscopy to tomography, enabling visualization of anatomical structures, physiological functions, and molecular pathology across scales from cellular to organ level.
As a solid-state laser manufacturer, Beamtech brings over 20 years of technical expertise and continuous innovation in the field of medical aesthetic lasers. For the applications described above, we offer Q-switched and long-pulse Alexandrite lasers. The product design and specifications are detailed below. We welcome inquiries and professional consultations!
| Models | Alex-Q |
|---|---|
| Wavelength | 755 nm, red color |
| Output coupling | Optical fiber |
| Single pulse energy | ≥500 mJ after the fiber |
| Energy stability (RMS) | ≤3% |
| Pulse duration | ~75 ns |
| Max repetition rate | 10 Hz |
| Beam profile | Flat top after the fiber |
| Beam diameter | 2–9 mm adjustable, zoom handpiece optional |
| Power consumption | 2000 W |
| Cooling type | Air to water |
| Laser head size | 575 mm × 150 mm × 125 mm |
| Models | Alex&YAG-LP-50 |
|---|---|
| Wavelength | 755 nm & 1064 nm (single wavelength optional) |
| Output coupling | Optical fiber |
| Max pulse energy (after fiber) | 50 J @ 755 nm, 80 J @ 1064 nm |
| Energy stability (RMS) | ≤5% @ 755 nm, ≤3% @ 1064 nm |
| Repetition rate | 0.3–10 Hz |
| Pulse duration | 0.3–300 ms |
| Power consumption | ≤3000 W |
| Required cooling capacity | >1500 W |
| Warm-up time | <5 min |
| Cooling type | Air to water, heater not required |
