Another relatively special and novel laser can be vividly called a "chameleon". It is not a dragon, but it can change color; as long as you turn a knob on the laser, you can get lasers in various colors of red, orange, yellow, green, cyan, blue, and purple. Does the dye have something to do with the laser? Not bad at all. The working materials of this laser are indeed dyes, such as carbocyanine, rhodamine, coumarin and so on. Scientists have not yet figured out the molecular energy levels and atomic structure of these dyes. They only know that they are different from the gas atom and ion structure of the gas working substance; the laser generated by the gas has a clear wavelength, while the high powered laser generated by the dye has a shorter wavelength range. Wide, or in other words, there are many colors.
An optical element called a grating is installed in the optical cavity of the dye laser. Through it, you can choose the color of the laser according to your needs, just like listening to radio stations of different frequencies from a radio. There are many forms of carbon dioxide lasers. The longest discharge tube is more than 200 meters, which takes up a lot of space. Scientists have come up with a way to bend the straight discharge tube into a shape that turns around, or stack the discharge tube and install it, compressing their actual length to about 20 meters; in order to make the optical path of the laser not affected by vibration, the entire device Placed in a thick pipe in the basement.
Later, a carbon dioxide high powered laser called lateral flow was invented, and its length was reduced to the length of a large desk, capable of emitting lasers with a power of several kilowatts. Such lasers have been used by many automobile and tractor factories to process large parts. A carbon dioxide laser with higher output power is structured like a large jet engine, and it sounds terribly loud when it starts. It can produce continuous lasers of millions of watts and is the strongest in continuous laser emission. This kind of laser was used in the initial experiment of laser hitting tank targets. It is made by scientists combining aerodynamics and laser science.
