The research study utilized a high-power diode laser specifically calibrated for precise dermatological applications. The device operated at a wavelength of 805 nm with a minimum peak power of 2100 W, delivering energy through a specialized cooling handle.
Core Takeaway: The system was designed to balance high-energy delivery with epidermal safety, utilizing a 2100 W peak power output and adjustable pulse durations (15–400 ms) paired with continuous contact cooling to protect the skin surface.
Detailed Technical Specifications
Wavelength and Power Output
The laser operated at a specific wavelength of 805 nm. This falls within the near-infrared spectrum, a standard for targeting specific chromophores in biological tissue.
The unit was capable of significant intensity, boasting a minimum peak power of 2100 W. This high peak power is essential for ensuring effective energy transfer to the target tissue without relying solely on long exposure times.
Energy Density (Fluence)
The device offered a versatile fluence range, delivering between 10 and 100 J/cm².
This wide range allows operators to adjust the aggressiveness of the treatment based on the specific requirements of the tissue or the patient's tolerance.
Pulse Duration Capabilities
The laser featured a variable pulse duration ranging from 15 to 400 ms.
Adjustability in pulse width is critical for matching the thermal relaxation time of the target, ensuring the target is destroyed without causing excessive thermal damage to surrounding tissues.
Delivery System and Spot Size
The laser energy was delivered through a handpiece with a fixed spot size of 9 x 9 mm.
While compact, this square spot size allows for precise placement of pulses.
Integrated Cooling Mechanism
To mitigate thermal injury to the skin surface, the device was equipped with an ET sapphire cooling assisted handle.
Sapphire is highly conductive thermally, making it an ideal material for contact cooling tips that must remain cold while transmitting high-power laser light.
Understanding the Trade-offs
Precision vs. Speed
The 9 x 9 mm spot size allows for high energy density and precision, but it presents a trade-off regarding treatment speed.
Covering large surface areas with a spot size of less than 1 cm² requires a higher number of pulses and longer treatment times compared to devices with larger apertures.
Power vs. Patient Safety
The high peak power (2100 W) necessitates strict safety protocols.
As noted in the exclusion criteria, high-energy laser applications are incompatible with conditions like photosensitivity, recent tanning, or the use of photosensitizing drugs. The high power makes the sapphire cooling not just a feature, but a mandatory safety component to prevent surface burns.
Making the Right Choice for Your Goal
When evaluating laser specifications for similar applications, consider how these parameters align with your clinical objectives:
- If your primary focus is treatment versatility: Prioritize a wide pulse duration range (e.g., 15–400 ms) to safely treat different tissue targets and skin types.
- If your primary focus is effective energy delivery: Ensure the device has high peak power (2000+ W) to maintain effective fluence even at shorter pulse widths.
- If your primary focus is patient safety: Verify the presence of active contact cooling (like sapphire tips), which is essential when operating at fluences up to 100 J/cm².
Successful laser application relies on balancing high peak power with the protective capacity of the cooling system.
Summary Table:
| Feature | Technical Specification |
|---|---|
| Wavelength | 805 nm (Near-Infrared) |
| Peak Power | Minimum 2100 W |
| Fluence (Energy Density) | 10 – 100 J/cm² |
| Pulse Duration | Variable 15 – 400 ms |
| Spot Size | 9 x 9 mm Square |
| Cooling System | Integrated ET Sapphire Contact Cooling |
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