the process of stimulated emission

Various technological advancements have turned themselves into amazing wonders which the humans appreciate and always want to poses. Once such development was the introduction of laser which was actually mechanism for emitting electromagnetic radiation mostly light or visible light through the process of stimulated emission. To define it in more general terms Laser light is generally a narrow-wavelength electromagnetic spectrum monochromatic light yet, there are lasers that emit a broad spectrum of light, or emit different wavelengths of light simultaneously and give a beautiful vision to the observer.

HPDFO™ Lens Technology
Thanks to Universal Laser Systems' patent-pending High Power Density Focusing Optics™ (HPDFO) technology, it is now possible to use a low-power CO2 laser system to permanently mark the surface of some bare metals without the use of marking compounds. HPDFO technology can produce extremely high-resolution images and vector cut much thinner lines than normally possible with a standard CO2 laser.

Metal Marking Compounds
Metal marking compounds can be used to mark a variety of bare metals. When a laser beam strikes the metal marking compound, it turns very dark (almost black) in color and permanently bonds to the metal's surface. Marks produced by this process will not rub off and are not affected by chemicals, cleaners or solvents. Metal marking compounds require a minimum of 25 watts of laser power to mark bare metal.