Long-Pulse Nd:YAG

What is long-pulse 1064 nm Nd:YAG?

Long-pulse 1064 nm Nd:YAG is a photothermal laser pathway. It delivers energy over a pulse measured in microseconds — thousands of times longer than a picosecond pulse — so the target absorbs controlled heat rather than being fragmented. The 1064 nm wavelength penetrates deeply and is absorbed little by epidermal melanin, suiting deeper vascular targets and darker skin types.

In plain terms: the same Nd:YAG crystal that drives a picosecond or Q-switched pigment laser can be run slowly enough to heat rather than shatter. That one change in pulse duration turns a pigment laser into a vascular, dermal-heating, and hair-reduction tool.

Photothermal, not photoacoustic

The mechanism is the key distinction, and it follows the principle of selective photothermolysis: choose a wavelength the target absorbs more strongly than surrounding tissue, then choose a pulse duration that confines the resulting effect to the target.

• A picosecond pulse confines energy so tightly in time that pigment particles fragment under pressure before heat has a chance to spread.
• A long pulse does the opposite on purpose. It gives energy time to build as heat inside a vessel wall, a follicle, or the dermis — targets that respond to controlled heating, not fragmentation.

On a multi-regime platform the two are complementary pathways. A provider selects the one that matches the target: picosecond for ink and pigment, long-pulse for vessels, redness, and dermal heating.

What a clinic can offer with long-pulse 1064 nm

Long-pulse 1064 nm opens treatment categories a pigment-only laser cannot reach — and most of them are recurring rather than one-off.

Specific suitability depends on vessel depth and diameter, skin type, and the provider’s assessment. For practices that already treat pigment, the commercial point is utilization: redness and vein consultations fill the hours between tattoo and pigment appointments on the same device, in the same room, with the same trained staff.

Long-pulse 1064 nm also has a place in selected melasma plans. Research has found increased vascularity in melasma lesions, which is why some provider-directed protocols pair a pigment regime with a long-pulse vascular pass — see The Vascular Component of Melasma.

Long-pulse vs picosecond vs Q-switched: one wavelength, three regimes

The three Nd:YAG pulse regimes share a wavelength and differ in duration by many orders of magnitude. That difference, not the wavelength, decides what each one treats.

A “pico laser” that offers only the first row is a pigment device. A platform that offers all three from one source is a multi-regime system, and the long-pulse row is what separates the two in a clinic’s menu and revenue.

Why 1064 nm for darker skin types

Shorter wavelengths are absorbed strongly by melanin in the epidermis, which is useful for superficial pigment and a liability on darker skin, where that absorption competes with the intended target. At 1064 nm epidermal melanin absorbs comparatively little, so more energy reaches a deeper vessel or follicle and less is deposited in the skin surface. This is why 1064 nm is the wavelength trained providers rely on for vascular and hair-reduction work across Fitzpatrick I–VI with appropriate parameters, and why a 1064 nm-first platform is a credible choice for a melanin-rich patient base. Laser hair removal for all skin types and Why melasma requires conservative energy cover the clinical reasoning.

How to evaluate a long-pulse Nd:YAG

Long-pulse 1064 nm is sold two ways: as a dedicated vascular/hair laser, or as a regime on a multi-mode Nd:YAG platform. Buyers comparing either should ask:

1. Which regimes share the source? A long-pulse-only laser treats vessels and hair; a platform that adds picosecond and Q-switched regimes also treats ink and pigment from the same footprint.
2. What range of pulse durations and spot sizes is available? These are machine specifications and should be on the specification sheet; the parameters chosen for a patient are provider-directed and should never be published as recipes.
3. How is the epidermis protected? Ask what cooling the handpiece or platform provides and how it performs on darker skin types.
4. What is the hair-reduction role? For a hair-removal-first clinic, a dedicated high-power diode platform such as the DioLase Titanium is usually the primary tool; long-pulse 1064 nm on a multi-regime platform is an extension of an existing menu.
5. Consumables and service. A platform with no per-pulse consumable keeps the margin on vascular and skin-quality series.
6. Training. Vascular work rewards patient selection and technique; ask what clinical onboarding accompanies the placement.

On the Pro 1 Pico platform

Long-pulse 1064 nm is one of the modes that makes the Pro 1 Pico a multi-regime platform rather than a pigment-only picosecond system. Alongside true 500 ps picosecond delivery at 1064 nm and 532 nm, PicoFusion™ collagen banking, and the PicoMatrix™ advanced remodeling handpiece, the long-pulse 1064 nm vascular Nd:YAG mode gives the platform its redness, vein, dermal-heating, selected hair-reduction, and onychomycosis categories — with no per-pulse consumable cost.

See the Pro 1 Pico product page for specifications, licensing, and regulatory status, and the laser hair removal overview for the hair-reduction context.

Technical background

Long-pulse delivery uses microsecond pulse durations — much longer than the picosecond pigment modes — so heat can build in the target. Exact pulse durations, energy, and spot sizes vary by device and are listed in each system’s manufacturer documentation. Providers evaluating a specific configuration should request the current specification sheet.