Intense Pulsed Light
Intense pulsed light (IPL) is not a laser. Instead of a single wavelength, it emits polychromatic, non-coherent, non-collimated broadband light spanning roughly 400 nm to 1200 nm. The key to IPL is that this spectrum can be tailored with cut-off filters, allowing the operator to select for different chromophores in the skin, such as melanin, hemoglobin or the bacterium Cutibacterium acnes (C. acnes).
At Haute-Derma, IPL is one of our versatile core treatments because it can address several cosmetic concerns in the same area at once: clearing small dilated blood vessels, fading superficial pigment, removing hair, controlling acute inflammatory acne and providing overall photorejuvenation.
How IPL Works: Light Biology and Cut-Off Filters
Whereas a laser delivers a focused beam at a single wavelength, IPL works by flexibly shaping a broad band of polychromatic energy:
- Selective Photothermolysis: IPL pulses pass through the epidermis and are preferentially absorbed by the target chromophores. The light is converted into heat on the spot, raising the target to a temperature that causes biological damage (60–70°C) so it is destroyed while the surrounding tissue stays as safe as possible.
- The Role of Cut-Off Filters: Dedicated filters block every wavelength below the cut-off value and let only the longer wavelengths through.
- Example: a 560 nm filter removes all light from 400–559 nm, so only wavelengths from 560–1200 nm penetrate into the dermis to act on melanin and hemoglobin.
- Adjustable Pulse Structure: Modern IPL platforms (such as Optima IPL, OPT and AOPT) use square-pulse technology, which keeps the energy density constant for the whole pulse duration. This avoids sharp energy spikes that can burn the skin and limits the drop-off in energy at the tail of the pulse.
IPL Filter Ranges and Clinical Indications
| Filter Range (Cut-Off) | Main Target (Chromophore) | Preferred Clinical Uses at Haute-Derma |
|---|---|---|
| 400–420 nm (Acne Filter) | Porphyrins (metabolic products of C. acnes) | Kills C. acnes and reduces acute inflammatory acne flares |
| 515–560 nm (Vascular / Pigment) | Superficial melanin and oxyhemoglobin | Freckles, sun spots, fine telangiectasia, post-acne redness (PIE) |
| 590–615 nm (Deep Vascular / Rejuvenation) | Deoxyhemoglobin and deeper melanin | Larger vascular lesions, rosacea, skin rejuvenation |
| 640–695 nm (Hair Removal / Collagen) | Follicular papilla melanin and tissue water | Hair removal over large areas (fine or coarse hair); stimulates fibroblasts to produce collagen |
Treatment Protocol and Parameter Settings at Haute-Derma
- Skin Preparation and Protective Cooling
- The skin is cleansed and a 1–2 mm layer of clear, chilled coupling gel is applied to carry the light into the skin and cool the outer epidermis.
- We check that the sapphire contact-cooling tip stays at 0–4°C to protect the epidermis from thermal burns.
- Choosing Pulse Settings and Fluence
- Pulse width: set according to the size of the target. Small targets such as fine capillaries need short pulses; larger targets need longer ones.
- Delay time: the pause between sub-pulses lets the surrounding healthy tissue shed its heat fully, which keeps discomfort to a minimum.
- Combined Rejuvenation and Recovery Protocols
- IPL photorejuvenation can be followed immediately by iontophoresis of exosomes or pure hyaluronic acid to calm the skin faster, restore hydration and enhance radiance.
IPL vs. Single-Wavelength Lasers (Nd:YAG / Alexandrite)
| Feature | Intense Pulsed Light (IPL) | Single-Wavelength Laser (Nd:YAG / Alexandrite) |
|---|---|---|
| Light characteristics | Polychromatic, broadband (400–1200 nm), non-coherent | Monochromatic, collimated, one fixed wavelength (1064 nm, 755 nm) |
| Spot size | Very large (1 × 3 cm to 2 × 4 cm) | Small, round (2–10 mm) |
| Treatment scope | Versatile: treats pigment, vessels, acne and hair over large areas at once | Specialized: destroys one specific target at a fixed depth |
| Discomfort and downtime | Gentle, no heavy crusting, no downtime needed | May sting or burn, cause light crusting or pinpoint bleeding (purpura) |
| Peak energy density | Moderate – suited to superficial, widespread lesions | Very high – suited to deep, small or treatment-resistant lesions |
