Abbreviated Journal Title
Appl. Phys. Lett.
Upconversion; Physics; Applied
We report room-temperature pulsed up-conversion laser oscillation in Er-doped LiYF4 and KYF4 at 551 and 562 nm, respectively. In both crystals laser oscillation is observed on the S-4(3/2)-I-4(15/2) ground state transition. Excitation was provided by a tunable flashlamp-pumped Ti:sapphire laser in the spectral region around 810 nm. Additional pumping with a continuous wave krypton ion laser at 647 nm was beneficial to both lasers. Laser action has also been observed in Er-doped Y3Al5O12 on the same transition.
Applied Physics Letters
Brede, R.; Heumann, E.; Koetke, J.; Danger, T.; Huber, G.; and Chai, B., "Green Up-Conversion Laser-Emission In Er-Doped Crystals At Room-Temperature" (1993). Faculty Bibliography 1990s. 652.