Sequential emission dual-wavelength output modes optimize collagen synthesis by delivering two distinct laser energies—10,600 nm and 1570 nm—to a single fractional pixel in a strictly coordinated order. By ensuring a vaporizing pulse is immediately followed by a thermal pulse, often in a precise 1:1 ratio, this method triggers deep tissue remodeling while maintaining critical epidermal protection.
By integrating deep vaporization with immediate thermal heating, this mode maximizes the production of both Type I and Type III collagen. It achieves superior scar flattening and skin texture improvement without elevating the risk of adverse side effects common in aggressive treatments.
The Mechanics of Sequential Emission
The Vaporization-Thermal Sequence
The efficacy of this mode relies on the specific order of energy delivery. First, a vaporizing pulse (10,600 nm) is fired to ablate tissue and create a vertical channel.
This is immediately followed by a thermal pulse (1570 nm). Because the channel is already open, this non-ablative energy can penetrate effectively to deliver deep heat without causing further surface damage.
Precise Ratio Delivery
The system delivers these wavelengths in precise ratios, such as 1:1. This ensures that the relationship between tissue removal (ablation) and tissue heating (coagulation) remains constant for every treated pixel.
This consistency allows for reproducible outcomes across the treatment area, eliminating the variability often seen when using separate devices for ablation and heating.
Biological Impact on Skin Architecture
Maximizing Collagen Types
The dual-action stimulus is specifically designed to enhance the synthesis of Type I and Type III collagen.
Type I collagen provides structural strength, while Type III is critical for tissue flexibility and repair. Boosting both types simultaneously creates a more comprehensive remodeling of the dermal matrix.
Deep Targeting with Surface Safety
The primary challenge in laser therapy is reaching deep tissue without destroying the skin's surface. Sequential emission achieves deep tissue targeting through the initial ablative pulse.
Simultaneously, the non-ablative thermal pulse promotes healing and remodeling while preserving the epidermal layer. This balance is what allows for significant aesthetic improvements with a lowered risk profile.
Understanding the Trade-offs
Complexity of Parameter Selection
While the safety profile is optimized, the efficacy depends heavily on maintaining the correct ratio between the two wavelengths.
If the balance shifts too heavily toward ablation, recovery times increase; if it shifts too heavily toward thermal, the remodeling effect may be insufficient for deep scars. The precision of the 1:1 ratio is not just a feature, but a requirement for the claimed safety benefits.
Making the Right Choice for Your Goal
To utilize sequential emission technology effectively, consider your specific clinical objective:
- If your primary focus is scar flattening: Leverage the ablative component of the sequential mode to break down fibrous tissue while the thermal component stimulates the new collagen required to smooth the texture.
- If your primary focus is safety and minimized downtime: Rely on the protective capacity of the non-ablative thermal pulse, which mitigates the risks typically associated with deep 10,600 nm treatments.
True optimization in laser therapy comes from the controlled synergy of destroying the old to build the new.
Summary Table:
| Feature | 10,600 nm Pulse (Ablative) | 1570 nm Pulse (Thermal) | Combined Sequential Mode |
|---|---|---|---|
| Primary Action | Tissue vaporization & ablation | Deep coagulation & heating | Synergistic remodeling |
| Tissue Impact | Creates vertical channels | Stimulates dermal matrix | Deep targeting + surface safety |
| Collagen Type | Structural breakdown (triggers repair) | Type I & III synthesis | Comprehensive architecture boost |
| Key Benefit | Precise scar flattening | Rapid healing & flexibility | Reproducible 1:1 ratio results |
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References
- Arminda Avdulaj, Lior Heller. Fractional CO2 Laser for Acne Scar Treatment: A Comparative Analysis of Ablative vs. Combined Ablative and Non-Ablative Modalities. DOI: 10.3390/jaestheticmed1010002
This article is also based on technical information from Belislaser Knowledge Base .
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