A laser made from a semi-conductor material and powered by applying electrical power to the material
tiny semiconductor that produces radiation when an electrical current passes through it (used in fiber optics, laser printers, remote control devices, and more)
A laser made from a semi-conductor material, and powered by applying an electrical potential to the material
A semiconductor diode that "lases", i e when pulsed, a laser diode emits coherent light: light of essentially one wave length, in phase traveling in the same direction