Deep Acoustic Wave™ Tattoo Removal by LINLINE

What is Deep Acoustic Wave?

Deep Acoustic Wave (DAW) is LINLINE’s next-generation approach to laser tattoo removal. Instead of relying on a single, high-energy nanosecond pulse, DAW delivers a train of precisely timed nanosecond pulses that fragment ink layer by layer. Each pulse opens a tiny “dye-free gateway,” allowing the next pulse to reach deeper pigment with less trauma to surrounding skin. 

Under the hood, DAW harnesses the photoacoustic effect generated by Q-switched lasers: ultrashort pulses create powerful acoustic waves that break ink particles apart while keeping heat spread to a minimum. That’s why well-designed nanosecond pulses can disrupt pigment mechanically rather than burning the skin. 

Why it’s different (and better)

Classic single-pulse Q-switched treatments often stall: the first pulse is absorbed by ink in the upper dermis, so energy doesn’t reach deeper pigment unless you turn the fluence up—raising the risk of skin damage. DAW’s pulse trains solve this by clearing shallow ink first, then sending subsequent pulses through the pathway created, reaching deeper layers safely. Clinically, this enables faster clearance with less collateral trauma than trying to remove everything with one big hit. 

Even more, using pulse trains makes it possible to achieve layer-by-layer fragmentation without the typical “frosting” seen after aggressive single-pulse shots—an indicator of non-selective tissue injury when pushed too hard.

The physics in simple terms

• Nanoseconds matter. Very short pulses create photoacoustic shock waves that crack ink granules. Thermal spread is limited because the pulse ends before significant heat diffuses into the skin.
• Multiple pulses, smarter energy. DAW uses sequences instead of lone pulses so energy reaches deeper pigment progressively, rather than bouncing off the top layer.
• Selectivity by wavelength. Different inks absorb different colors of light. MULTILINE™ (LINLINE’s platform) equips clinicians with optimal wavelengths—540, 694, 755, and 1079 nm—to match most ink colors while sparing skin. 

Wavelengths & ink colors

MULTILINE™ provides interchangeable Q-switched emitters, so your practitioner can target the spectrum of inks:

• 1079 nm (Nd:YAP) – excellent for black/blue pigments; comparable in action to 1064 nm Nd:YAG.
• 540 nm (Nd:YAP/KTP) – for reds/oranges; functionally analogous to 532 nm in Nd:YAG/KTP systems.
• 755 nm (Alexandrite) – effective for greens and some blues.
• 694 nm (Ruby) – addresses black/blue/green

The benefit of this multi-wavelength approach: multicolored tattoos can be addressed in one platform by selecting the best match for each ink. (In tattoo removal generally, several wavelengths are still needed for optimal results.) 

What you can expect

• Fewer sessions vs. classic single-pulse methods. Because DAW’s pulse trains break ink in sequence (shallow → deep) during a pass, it reduces the stop-start inefficiency of single-pulse approaches and helps shorten the overall course.
• Minimal skin trauma. Energy is concentrated inside pigment granules; surrounding skin structures are largely spared.
• Multiple sessions are still normal. Professional, dense, and multicolored tattoos usually require more visits than amateur tattoos; complete clearance is the goal but not guaranteed for every case—this is true of all Q-switched-based methods. 

Safety & selectivity

DAW was designed around selective photodestruction: pick the right wavelength (optical selectivity) and keep pulse power within the window where ink fragments, not skin (mechanical selectivity). Over-powering any Q-switched laser can injure tissue, so correct energy and pulse-train settings are key—one reason MULTILINE™ systems emphasize stable, tunable outputs and pre-programmed protocols. 

The MULTILINE™ platform behind DAW

LINLINE’s MULTILINE™ is a modular medical laser system with external, high-power Q-switched emitters for DAW tattoo removal and other applications. Available modules include Nd:YAP/KTP 540/1079 nm, Ruby 694 nm, and Alexandrite 755 nm, giving clinicians the tools to customize treatment across ink colors and skin types.

Bottom line: Deep Acoustic Wave™ combines the proven physics of Q-switched photoacoustic fragmentation with smarter pulse-train sequencing and multi-wavelength selectivity. The result is faster, gentler, and more complete tattoo clearance across a wide range of inks—while keeping skin safe.