Pico vs Q-Switched Lasers: What Is the Difference?

Almost every tattoo removal clinic in Canada uses one of two laser families: Q-switched nanosecond lasers, the long-time standard, or newer picosecond ("pico") lasers. Here is what actually differs — and what matters more than the machine.

The one-sentence difference

Both lasers work by firing extremely short pulses of light that shatter ink particles so your immune system can clear them. A Q-switched pulse lasts billionths of a second (nanoseconds); a picosecond pulse lasts trillionths — roughly a thousand times shorter — which shatters ink into finer fragments with a stronger photoacoustic (pressure) effect and less heat.

Wavelengths matter as much as speed

Ink colour decides which wavelength a clinic needs, whatever the pulse speed:

If your tattoo has light blue or green ink, the right question to ask a clinic is not "pico or Q-switched?" but "which wavelengths do you have for my colours?"

Platforms you will see in Canadian clinics

• Picosecond: PicoSure (755 nm alexandrite), PicoWay (1064/532 nm), PiQo4, Discovery Pico and enlighten.
• Q-switched: classic Nd:YAG systems, RevLite and MedLite — older, but proven over decades of use.

Claims vs reality

• "Pico removes tattoos in half the sessions." Pico lasers were marketed on faster clearance, and they do perform well on stubborn colours and resistant ink. In practice, independent comparisons show the advantage is real but usually modest — many tattoos fade at a similar overall pace on well-run treatments from either family.
• "Q-switched is obsolete." No. For straightforward black tattoos, a Q-switched Nd:YAG in experienced hands remains an effective, often cheaper option.
• Operator skill beats machine specs. Settings, technique, honest spacing advice and wavelength choice for your ink colours influence results at least as much as pulse duration.

Comfort, skin types and price

Both sting — most people compare it to hot snaps of an elastic band — and both are usually paired with cold-air cooling or numbing. The 1064 nm wavelength (available in both families) is preferred for darker skin because it is least likely to disturb surrounding pigment. Pico sessions are often priced higher per visit; if the session counts end up similar, Q-switched can be the cheaper route to the same endpoint.

Bottom line

Choose the clinic, then the laser. Ask which wavelengths they would use on your specific colours, how many sessions they honestly expect, and to see healed results on tattoos like yours. Our directory lists the laser platform for every clinic that publishes one, so you can filter before you book consults.