First ruby crystal laser operatedIn 1960, a synthetic ruby crystal laser was first operated at Hughes Research Laboratories in Malibu, California. The laser is a device that produces monochromatic coherent light (light in which the rays are all of the same wavelength and phase). This first operable laser device was invented by American physicist Theodore Maiman, for which he was issued U.S. Patent 3,353,115 on 14 Nov 1967. |