A particular functioning arrangement, setup, or condition for laser operation, such as continuous emission, pulses, or grouped pulses. Mode also describes the cross-sectional shape of the beam. See Transverse Electromagnetic Mode, abbreviated TEM.

The ability to superimpose an external signal on the output beam of the laser as a control.

Theoretically, light consisting of just one wavelength. Since no light is completely monochromatic, it usually consists of a very narrow band of wavelengths. Lasers provide the narrowest bands.

Theoretically, light consisting of just one wavelength. Since no light is completely monochromatic, it usually consists of a very narrow band of wavelengths. Lasers provide the narrowest bands.