For a US clinic, the wrong pick can narrow your patient population, shrink your treatment menu, reduce your safety margin, and slow your return on a six-figure purchase. Brand recognition shouldn't drive that decision.
This guide compares wavelength, melanin absorption, skin-type fit, applications, device specifications, FDA documentation, and ownership costs so you can match a platform to your patients.
Key Takeaways
- 1064 nm Nd:YAG penetrates deeper and suits darker skin types when settings, cooling, and training are right.
- 755 nm Alexandrite absorbs melanin more strongly, fitting lighter skin with dark hair.
- Neither wins universally; patient mix and utilization decide.
- Dual-wavelength platforms widen coverage, but verify price, service, and clearances in writing.
- Long-pulsed hair systems differ from Q-switched and picosecond lasers.
Nd:YAG vs Alexandrite: Quick Comparison
Wavelength and Energy Behavior
Longer wavelengths penetrate deeper and are absorbed less by melanin. That one principle drives most of the differences below.
- Nd:YAG (1064 nm): deeper penetration, lowest melanin absorption of the common aesthetic wavelengths.
- Alexandrite (755 nm): stronger melanin absorption, more superficial targeting.
Skin-Type and Hair-Type Fit
Candela's wavelength guidance pairs 755 nm with Fitzpatrick I-III and 1064 nm with IV-VI. Alexandrite works best with dark hair on lighter skin. Caution rises as epidermal melanin increases, including from recent tanning.
Nd:YAG is the usual choice for darker skin. Candidacy, settings, cooling, and test spots still matter.
Side-by-Side Snapshot
| Factor | Alexandrite 755 nm | Nd:YAG 1064 nm |
|---|---|---|
| Melanin absorption | Higher | Lower |
| Relative depth | More superficial | Deeper |
| Manufacturer positioning | I-III | IV-VI |
| Shared limit | White and gray hair | White and gray hair |
Workflow and Specifications
Published specs vary by platform. Two named US-cleared dual-wavelength systems show the range:
| Spec | Candela GentleMax Pro Plus | Cynosure Elite iQ |
|---|---|---|
| Spot sizes | 1.5-26 mm | 2.5-24 mm |
| Pulse duration | 0.25-100 ms | 0.5-300 ms |
| Repetition rate | 0.5-10 Hz | 0.5-10 Hz |
| Cooling | Cryogen spray or chilled air | Cold-air chiller compatible |
| FDA 510(k) | K201111 | K193426 |
These are capabilities, not treatment settings or throughput. Ask for the serial-specific sheet for the unit you're quoted.
Ownership Considerations
Public pricing for standalone or dual long-pulsed systems is thin, so get written quotes. Compare:
- New versus pre-owned cost
- Service contracts and training
- Maintenance and financing
- Room utilization
Candela's sale terms put taxes, freight, and insurance outside the purchase price, and exclude preventive maintenance from the limited warranty.
What Is the Nd:YAG Laser?
Nd:YAG stands for neodymium-doped yttrium aluminum garnet. The long-pulsed aesthetic configuration emits at 1064 nm. Greater depth and low surface melanin absorption are why clinics use it on darker skin types.
One Name, Different Devices
"Nd:YAG" is not one universal device. Pulse duration changes the purpose:
- Long-pulsed (milliseconds): hair removal and vascular work.
- Q-switched (nanoseconds): an FDA summary lists nominal 5-20 ns pulses for one such system, used for tattoos and pigment.
- Picosecond: PicoWay's FDA summary describes 240-500 ps pulses, a different regime that doesn't transfer to hair-removal performance.
Frequency-doubled configurations produce 532 nm, which is not equivalent to the 1064 nm hair system.
Benefits and Use Cases
- Works across a wide range of skin types, including darker tones
- Reaches deeper targets than shorter wavelengths
- Supports several cleared indications on one platform
- Treats patients who are poor candidates for lighter-skin systems
Elite iQ's 1064 nm labeling includes telangiectasia, rosacea, venous lakes, and leg veins. Those are cleared indications, not efficacy benchmarks. Always confirm against the exact device's 510(k).
Trade-Offs and Evidence
Lower melanin absorption in the hair itself makes hair color and coarseness important. Comfort, cooling, and operator skill matter too.
A 2001 clinical study of 20 women with Fitzpatrick IV-VI skin and dark terminal hair reported 70%-90% reduction 12 months after three monthly treatments. Side effects included mild-to-moderate pain and rare transient pigment changes. It was small and nonrandomized, so treat it as supportive, not definitive.
What Is the Alexandrite Laser?
Alexandrite is a solid-state laser that commonly emits at 755 nm. Melanin absorbs it strongly, which makes it effective when dark hair contrasts with lighter skin.
Operational Strengths
Practices focused on high-volume hair removal often value large spot sizes, treatment speed, and a focused workflow. Judge spot size, speed, and workflow claims against published device specifications, not marketing copy.
The Main Limitation
Epidermal melanin absorbs the energy too. Before treating, evaluate:
- Skin type and recent tanning
- Treatment area
- Cooling, fluence, and pulse duration
- Test-spot results
Where It Fits and Where It Doesn't
Alexandrite suits lighter skin with dark hair. It is less appropriate for darker or freshly tanned skin, low-pigment hair, and clinics needing broad demographic coverage.
A 2025 randomized study of 40 women with Fitzpatrick II-III skin compared two 755 nm systems for axillary hair. It found 91.4% versus 94% reduction, not significantly different. That finding does not apply to every Alexandrite platform. A 2022 systematic review also found that none of five eligible RCTs met high-quality standards.
Picosecond Alexandrite systems such as PicoSure Pro sit in a different category. They are listed for tattoos and pigment, not hair reduction, and carry no hair-reduction clearance.
Nd:YAG vs Alexandrite: What Is Better for a Clinic?
"Better" depends on your patient mix, treatment menu, protocols, utilization, staffing, budget, and growth plans.
Patient Demographics
Count the share of lighter, medium, darker, and recently tanned patients, and the body areas you treat. A practice serving mostly lighter-skinned patients may prioritize Alexandrite. A diverse practice should look at Nd:YAG or a verified dual-wavelength platform.
Hair Characteristics
Skin type alone shouldn't pick the wavelength. Consider hair color, thickness, density, area, and remaining hair after prior treatment. ASLMS states laser hair removal can't work on white or gray hair because there's no melanin to target. That limit applies to both wavelengths.
Treatment-Menu Expansion
If you want vascular, pigment, rejuvenation, or tattoo work, separate three things:
- What the laser can physically do
- What the manufacturer markets
- What the FDA has cleared for that exact configuration
510(k) clearance means substantial equivalence to a predicate. It isn't a head-to-head superiority result.
Ownership and Workflow Economics
Assess purchase price, pre-owned condition, warranty, service availability, parts, cooling needs, training, financing, and downtime. A lower sticker price isn't automatically lower total cost. A versatile device pays off only with enough utilization.
Single vs Dual Wavelength
Dual platforms let you pick the wavelength per patient instead of forcing everyone onto one. The trade-off is higher price, more training, maintenance complexity, and room demands. Choose dual-wavelength only if your patient base justifies the extra cost and complexity.
Procurement Checklist
For the exact model, request:
- Technical specification sheet and user manual
- FDA 510(k) documentation
- Warranty terms and service-level details
- Training scope and cooling specifications
- References from comparable clinics
The Pico Laser Buyer's Guide offers a manufacturer-backed research library and transparent technical comparisons, useful when you're weighing broader aesthetic-laser portfolios or separating picosecond platforms from long-pulsed hair systems.
Real-World Scenarios
New med spa, lighter-skinned clientele, high-volume hair removal. Test an Alexandrite quote against your booking forecast, financing, and service terms. Confirm that demand justifies the room time.
Dermatology or plastic surgery practice, diverse patients. Weigh Nd:YAG or a dual-wavelength system for broader coverage, and check vascular or other indications against the 510(k).
Documented clinic path. Candela's provider spotlight describes Aesthetic Element Medical in Weston, Florida. The injectables-only practice added energy-based treatments, starting with hair removal.
It weighed technical support, clinical education, and warranty coverage, then upgraded to a GentleMax Pro Plus for larger spots and faster pulses. Outcomes are testimonials, with no audited revenue or utilization data.
The takeaway: choose by documented indications, patient demand, staff capability, and total cost of ownership, not wavelength or advertised speed.
Conclusion
Alexandrite is strongest for clinics prioritizing efficient hair removal on lighter skin. Nd:YAG is more versatile for darker skin and deeper targets when correctly configured and operated.
Base the final call on:
- Exact device and FDA-cleared indications
- Patient demographics and hair characteristics
- Cooling and parameter controls
- Service support and ownership economics
Compare manufacturer documentation before you buy.
Frequently Asked Questions
How much does Nd:YAG laser treatment cost?
Patient pricing and clinic equipment cost are separate. ASPS lists $697 as an average for laser skin treatments broadly, not a hair-removal session fee. Request current quotes for patient sessions and for clinic equipment.
What are the differences between Alexandrite and YAG lasers for hair removal?
Alexandrite (755 nm) absorbs melanin more strongly and suits lighter skin with dark hair. Nd:YAG (1064 nm) penetrates deeper, is absorbed less by skin melanin, and is favored for darker skin. Both need careful settings and cooling.
Which hair removal laser is the most effective?
There is no universal winner. Results depend on matching wavelength to skin and hair, plus settings, cooling, operator training, and consistent treatment. Neither works on white or gray hair.
Is Alexandrite a laser or IPL?
Alexandrite is a laser producing a single 755 nm wavelength. IPL uses broad-spectrum, incoherent light and isn't a laser. The difference matters for precision and device evaluation.
What is Alexandrite?
It's both the laser medium and the technology, commonly emitting at 755 nm. Its main aesthetic use is hair removal, with careful patient selection required.
What is the wavelength of a YAG laser?
Long-pulsed aesthetic Nd:YAG uses 1064 nm. Frequency-doubled configurations produce 532 nm. Check the exact device's specifications.
