Wavelength

Laser wavelengths covers ultraviolet, visible and infrared regions of the optical spectrums, which are various with different colors, and inversely proportional to frequency. Longer wavelength gets lower frequency.
Varieties of wavelengths:
Ultraviolet radiations of lasers consist of wavelengths between 180nm to 400nm.
Visible lasers contains wavelengths between 400nm to 700mm, including formally used devices of 405nm blue violet laser, 445nm, 460nm and 473nm blue lasers, 515nm, 520nm and 532nm green lasers, 635nm, 650nm and 660nm red lasers.
Infrared lasers contains wavelengths between 700nm to 1mm, including IR lasers of 780nm, 808nm, 830nm, 850nm, 880nm, 940nm, 980nm, 1060nm, 1310nm and 1550nm.