Description
The Technology
When it comes to Q-Switched (QSW) lasers, there are a few key components to discuss:
- The laser
- The gain medium
- The Q-switching mechanism
Laser
The word ‘laser’ is an acronym for ‘Light Amplification by Stimulated Emission of Radiation.’ Lasers are monochromatic, which means that photons emitted will be moving at a wavelength (i.e., color) determined by the gain medium. They are also collimated, meaning that in a vacuum, the light beam won’t spread out.
Lasers fall into various classifications, dependent on the power emitted. These classifications vary from Class I (one, or 1), to Class IV (four, or 4). Most lasers used in aesthetics and all lasers for tattoo removal are Class IV laser devices. This means they are the most powerful class of laser, and goggles or patient eye shields are required to be worn for safe use of the device.
