Laser hair removal has become a cornerstone in dermatology and medical aesthetics, offering a safe, effective, and long-term solution for unwanted hair. The efficacy of this procedure is influenced by factors such as individual skin and hair types, the specific laser technology utilized, and the area being treated.

We developed a signal modulation scheme at a constant current to produce varying laser intensities and evaluated their effects on human hair samples. An 808nm diode laser system was employed, generating five distinct power outputs: 1.20 W, 1.74 W, 2.06 W, 2.24 W, and 2.34 W. The optical spectra of these outputs were measured using a spectrometer, and the resulting effects on hair shafts were analyzed via Scanning Electron Microscopy (SEM).

The SEM analysis revealed a correlation between laser intensity and the degree of surface damage to the hair shafts. Specifically, the percentage of surface damage increased from 4.11% at 1.20 W to 15.90% at 1.74 W, then slightly decreased to 14.94% at 2.06 W, followed by increases to 21.04% at 2.24 W and 34.45% at 2.34 W. These findings indicate that higher laser intensities generally result in greater surface damage to hair shafts.

This study underscores the importance of optimizing laser parameters to enhance the effectiveness of hair removal treatments while minimizing potential adverse effects. By tailoring laser intensity to individual patient characteristics and treatment areas, practitioners can achieve improved outcomes in laser hair removal procedures.

Laser cleaning technology utilizes high-energy laser beams to remove contaminants, rust, and coatings from surfaces without damaging the underlying material. This method offers precision, efficiency, and environmental benefits over traditional cleaning techniques.

Our system employs a continuous fiber laser with a maximum output of 20W and a modulated frequency up to 20kHz. This configuration allows for precise control over the laser’s intensity and pulse duration, enabling effective removal of various contaminants. The laser beam is directed by a high-speed galvanometer (galvo) mirror system, which rapidly and accurately steers the beam across the target surface. This setup ensures uniform cleaning and accommodates complex geometries.

The integration of a high-speed galvo mirror with a modulated fiber laser enhances the system’s versatility, making it suitable for applications in industries such as automotive, aerospace, and manufacturing. This approach not only improves cleaning efficiency but also reduces operational costs and environmental impact.

Laser surface alloying is a technique that enhances the surface properties of materials by introducing alloying elements through laser processing. This method improves characteristics such as wear resistance, corrosion resistance, and hardness, making it valuable in various industrial applications.

Our system utilizes a CO₂ laser with a maximum output of 100W, providing sufficient energy to melt the substrate surface and facilitate the incorporation of alloying elements. The laser beam is precisely controlled using stepper motors, enabling accurate manipulation of the laser’s position and movement across the material’s surface. This mechanical control ensures uniform alloying and consistent surface modification.

The integration of a high-power CO₂ laser with stepper motor control allows for precise and efficient laser surface alloying. This setup is suitable for enhancing the surface properties of various materials, including metals and alloys, thereby extending their service life and performance in demanding environments.

Laser cutting and engraving are advanced manufacturing techniques that utilize focused laser beams to precisely cut or engrave materials. In laser cutting, the laser melts or vaporizes the material along a defined path, enabling intricate designs and complex shapes with high precision. Laser engraving involves removing material from the surface to create detailed patterns, text, or images, offering versatility across various materials such as metals, plastics, wood, and glass.

By delving into laser cutting and engraving technologies, researchers and professionals can drive advancements in manufacturing processes, material development, and product innovation, contributing to economic growth and technological progress.