These devices require more electrons to be in a higher energy state than a lower energy state, which is called population inversion.
Examples of these devices named Shiva and Nova were used at the Lawrence Livermore National Laboratory to study inertial confinement fusion. Steven Chu won a Nobel Prize for developing methods to cool and trap atoms using these devices. Short pulses of high power are created in these devices using mode-locking. A possible gain medium in these devices is neodymium-doped yttrium aluminum garnet. These devices require more electrons to be in a higher energy state than a lower energy state, which is called population inversion. For 10 points, name these devices that produce a coherent light beam through stimulated emission of radiation.
Examples of these devices named Shiva and Nova were used at the Lawrence Livermore National Laboratory to study inertial confinement fusion.
lasers [or light amplification by stimulated emission of radiation] 