Introduction
Ruby and pico get pitted against each other constantly, but they describe different things. "Ruby" names a laser medium and its roughly 694 nm wavelength. "Pico" names a pulse duration, measured in trillionths of a second.
That mismatch matters when you're buying equipment for tattoo removal, pigmented lesions, acne scars, or wrinkles. A flawed comparison can leave you with the wrong wavelength, an unneeded capital expense, or a platform that can't grow with your service menu.
Some devices blur the line entirely: Quanta's Discovery Pico pairs a 694 nm ruby wavelength with 450 ps pulses.
This article compares pulse duration, wavelengths, treatment fit, safety, ownership costs, and US regulatory documentation.
Key Takeaways
- Ruby identifies a wavelength or medium; pico identifies pulse duration.
- Q-switched ruby suits selected pigment targets; pico platforms vary widely in wavelengths.
- Neither wins outright. Diagnosis, skin type, operator skill, and FDA 510(k) clearance decide.
- Compare total cost of ownership and expected demand, not just advertised pulse width.
Ruby vs Pico Lasers: Quick Comparison
| Attribute | Q-switched ruby | Pico platforms |
|---|---|---|
| What it names | Ruby crystal medium, 694 nm | Picosecond pulse duration |
| Pulse width | One Quanta brochure lists 30 ns Q-switched pulses, plus a 2 ms photothermal mode | Varies: PicoSure 450-900 ps, PicoWay 240-500 ps, enlighten III 660/750 ps |
| Wavelengths | Primarily 694 nm | Platform-dependent: 532, 730, 755, 785, 1064 nm and others |
| Typical uses | Benign pigment, selected tattoo colors | Tattoos, benign pigment, and on some handpieces acne scars and wrinkles |
| Safety focus | Strong melanin absorption narrows margin in darker or tanned skin | Shorter pulses do not eliminate complications |
| Cost questions | New vs. pre-owned, service, single-wavelength fit | Handpieces, wavelength modules, service, utilization |
Treat the ruby pulse figure as one brochure's number, not a universal specification. Verify each device.
Mechanism is less binary than marketing implies. Q-switched lasers produce both photothermal and photoacoustic effects, so "thermal ruby versus acoustic pico" oversimplifies.
Pico delivers energy faster, which may concentrate the acoustic effect and limit thermal spread. It doesn't mean zero heat or zero risk.
What Are Ruby and Pico Lasers?
What is a ruby laser?
A ruby laser uses a chromium-doped aluminum oxide crystal and emits at about 694 nm. Conventional systems are Q-switched, releasing stored energy in short, intense bursts. Some devices also offer a longer-pulse mode, so not every ruby unit is identical.
Strong melanin absorption is the draw and the hazard. The same selectivity makes skin type, tanning status, test spots, conservative settings, and accurate diagnosis critical.
Use cases of ruby lasers
Ruby fits clinics with focused needs: benign superficial pigment or specific blue, black, and green tattoo inks. FDA K152012 covers 694 nm Q-switched treatment of tattoos and benign pigment, including lentigines and Ota/Ito nevi. Clearance doesn't mean a given vendor stocks it.
The evidence carries caveats. A 2008 prospective study of 91 patients with Fitzpatrick types II-IV reported complete lentigine clearance. Dyspigmentation rates rose with skin type:
- 7.8% in type II
- 9.8% in type III
- 16.6% in type IV
A separate Nevus of Ota series found 16.8% hypopigmentation, which can be permanent. These are historical findings on the modality, not current-model benchmarks.
What is a pico laser?
A picosecond laser emits pulses measured in picoseconds. It isn't a brand or a fixed wavelength. Two pico systems can differ sharply in wavelength, peak power, spot size, and handpieces.
For example, PicoWay offers 1064 and 532 nm core wavelengths with optional 730 and 785 nm applicators. Fotona's StarWalker PICO Pro lists 1064/532 nm with optional 585/650 nm handpieces.
Shorter pulses may add photoacoustic contribution and reduce thermal diffusion, but outcomes still hinge on diagnosis, settings, and operator experience.
Verify every wavelength, indication, and claim against manufacturer specifications and FDA 510(k) records. Even "pico" platforms can include nanosecond modes. The enlighten III also offers 2 ns pulses, and the Discovery Pico family's scar and wrinkle indications sit under nanosecond modes.
Use cases of pico lasers
Multiwavelength pico systems appeal to tattoo clinics, med spas, and dermatology or plastic surgery practices that want one platform for varied ink colors, pigment depths, acne scars, and rejuvenation. The clinical evidence is device-specific:
- A 2020 systematic review of 36 studies reported pico advantages for blue, green, and yellow pigment, while noting heterogeneity limits firm recommendations.
- A randomized trial found equal black-tattoo clearance between 1064 nm pico and nanosecond lasers, with less pain on pico (3.8 vs 7.9).
- A 2015 study of a 755 nm pico with diffractive lens array improved acne scar volume by about 24-27%.
None of these is a ruby comparison, and none proves pico is superior overall.
Ruby vs Pico Lasers: What Is Better for Your Practice?
Base the choice on clinical indications, wavelength coverage, pulse duration, skin-type labeling, training, 510(k) clearance, service support, and evidence quality. Marketing labels such as "newer" or "faster" matter less than those specifics.
When ruby makes sense
- You have a defined need for 694 nm.
- You treat selected pigment concerns.
- Your operators are experienced.
- You accept limited wavelength flexibility.
When pico makes sense
- You need multiple wavelengths.
- You see a broad mix of tattoo and pigment cases.
- You want fractional handpieces for scars or rejuvenation.
- You've verified the exact system supports those applications.
Some platforms combine both. Quanta's Discovery Pico Plus offers an optional 694 nm ruby wavelength alongside standard 1064/532 nm picosecond output, with a planning range of roughly $160,000-$230,000 new. That adds configuration complexity.
Workflow and safety
Results depend on consultation, test spots, treatment intervals, documentation, and aftercare. The ASDS advises that a test treatment should always be performed, because postinflammatory pigmentation can occur.
Shorter pulses may reduce heat spread in some protocols but don't remove that risk. Darker skin calls for conservative settings and a sun-exposure assessment.
Total cost of ownership
Planning ranges in the Pico Laser Buyer's Guide's research vary widely: Aesthetika PicoTech around $60,000, PicoPlus $120,000-$180,000, enlighten III $180,000-$250,000, and PicoWay $250,000-$325,000. Treat these as estimates; exact pricing needs a written quote.
Weigh these costs against realistic demand:
- Handpieces and wavelength modules
- Warranty terms (commonly 1-2 years) and service response
- Preventive maintenance and replacement parts
- Training, financing, and room utilization
- Pre-owned inspection and warranty transferability
US procurement checklist
- Confirm FDA 510(k) clearance for each intended indication, wavelength, and handpiece. Technical capability isn't clearance, and off-label use remains the practitioner's responsibility.
- Check state rules. 21 CFR 801.109 limits prescription device sales to licensed practitioners, and states set operator scope separately. California limits laser tattoo procedures to physicians and supervised PAs and RNs; Texas requires DSHS registration for Class 3B/4 lasers.
- Request manufacturer support terms and clinical references in writing.
- Inspect pre-owned units and confirm warranty transferability.
- Write down expected utilization before comparing quotes.
The Pico Laser Buyer's Guide offers manufacturer-backed specifications, source documentation, and a comparative research library covering 16 pico platforms. Use it as one educational input, not a substitute for clinical, legal, or regulatory advice.
Real-World Procurement Scenarios
Clinical studies report treatment outcomes, not equipment price, ROI, or throughput.
Take the 2015 acne-scar study (Brauer et al.). Twenty patients, skin types I-V, received a 755 nm pico with a diffractive lens array. Seventeen completed six treatments, with scar-volume improvement of 24.3%, and 27.2% at three months. Erythema and edema resolved within hours to two days.
A 2017 pilot tested whether higher pulse coverage helps. Seven subjects (types II-IV) showed no between-side benefit (P=0.788), and one developed mild PIH. Small samples, but the lesson holds: more aggressive settings aren't automatically better.
Match the platform to the menu you plan to run:
- A wavelength-specific ruby system fits a narrow pigment practice
- A multiwavelength pico fits a broader tattoo and scar menu when clearance covers it
Review the Pico Laser Buyer's Guide's platform research and source documentation before requesting quotes or scheduling demonstrations.
Conclusion
There's no universal winner. Ruby may suit a focused, wavelength-specific need. Pico may justify its cost when wavelength flexibility and multiple applications fit your demand.
The strongest decisions weigh several factors together:
- Diagnosis and intended indications
- Skin-type limits and operator expertise
- FDA clearance and serviceability
- Total cost of ownership
Compare documented specifications against realistic patient demand before you commit.
Frequently Asked Questions
Is Q switch or pico laser better?
Neither is universally better. Compare the exact system's wavelength, pulse duration, cleared indications, and evidence, plus your patient skin types and operator expertise.
Why is ruby laser called pulsed laser?
Ruby systems typically run in pulsed or Q-switched modes, releasing stored energy in short bursts. "Ruby" names the medium or wavelength; "pulsed" describes energy delivery.
What is the difference between a ruby laser and a pico laser?
Ruby is a medium and wavelength category (about 694 nm). Pico is a pulse-duration category. Compare the specifications of the actual devices.
Which laser is better for tattoo removal, ruby or pico?
It depends on ink color, available wavelengths, tattoo depth, skin type, and protocol. Not every pico system outperforms every ruby system.
Is a pico laser safer than a ruby laser for darker skin?
Not automatically. Shorter pulses or added wavelengths may help in selected cases, but conservative settings, test spots, sun-exposure review, and experienced operators matter most.
What should a clinic compare before buying a ruby or pico laser?
Compare cleared indications, wavelengths, pulse duration, training, warranty and service, total cost of ownership, pre-owned inspection, and expected patient demand.
