Laser diodes are semiconductor devices that emit light when an electric current is passed through them. The two main types of laser diodes are single mode and multimode.
A diode laser is a device that emits light through the process of stimulated emission. The word “diode” comes from the Greek prefix “dio,” meaning two, and refers to the fact that there are two electrodes in a diode laser: a cathode and an anode.
Semiconductor laser diodes are light-emitting devices that are used in a wide range of applications, including fiber-optic communications, data storage, and biomedical imaging.