double-quantum stimulated-emission device

double-quantum stimulated-emission device

[¦dəb·əl ′kwänt·əm ¦stim·yə‚lād·əd ē′mish·ən də‚vīs]
(optics)
A laser in which the crystal contains two species of fluorescent ions whose fluorescence frequencies are so related that, when the flash lamp coils produce pumping action, the ions of one species contribute photons to the fluorescence of the other species, which is the active ion.