We describe the first reported observation of stimulated emission from a 5d–4f transition in a triply ionized rare-earth-doped crystal. Ce+3 ions in LiYF4 (YLF), optically pumped at 249 nm, emitted at 325.5 nm, the shortest wavelength yet obtained from an optically pumped solid-state laser. The large fluorescence linewidth of the laser transition makes the Ce:YLF laser a potentially tunable source of coherent near-ultraviolet radiation between 305 and 335 nm.
© 1979 Optical Society of America
Original Manuscript: March 1, 1979
Published: June 1, 1979
D. J. Ehrlich, P. F. Moulton, and R. M. Osgood, "Ultraviolet solid-state Ce:YLF laser at 325 nm," Opt. Lett. 4, 184-186 (1979)