Title :
Up-conversion processes and population dynamics of excited levels in Er3+ doped KPb2Cl5 crystals as new potential VIS and IR laser material
Author :
Ivanova, S. ; Tkachuk, A. ; Isaenko, L. ; Yelisseyev, A. ; Payne, S. ; Joubert, M.F. ; Guyot, Y. ; Gapontzev, V.P.
Author_Institution :
Dept. of Phys., St. Petersburg State Univ., Russia
Abstract :
In this paper, optical spectra, luminescence decays and up-conversion processes in Er3+: KPb2Cl5 crystals, grown by Bridgman technique were studied. The luminescence spectra were recorded under UV and LD excitation, intensity parameters were determined by Judd-Ofelt method; radiative and radiationless transition probabilities were calculated. Luminescence kinetics from excited Er3+ levels, studied under its selective laser excitation, concentration quenching and up conversion processes, were considered. The conclusion is made that the Er3+:KPC crystals can be considered as one of the most promising active media for VIS and IR solid-state up-conversion LD pumped lasers with extremely low Stocks´ losses.
Keywords :
Judd-Ofelt theory; crystal growth from melt; erbium; infrared spectra; nonradiative transitions; optical materials; potassium compounds; radiation quenching; semiconductor lasers; visible spectra; Bridgman technique; Er3+: KPb2Cl5 crystals; Judd-Ofelt method; KPb2Cl5: Er3+; LD excitation; LD pumped lasers; Stocks´ losses; UV excitation; concentration quenching; excited levels; intensity parameters; laser excitation; luminescence decays; luminescence kinetics; optical spectra; population dynamics; radiation transition probabilities; radiationless transition probabilities; up-conversion processes; Crystals; Erbium; Kinetic theory; Laser excitation; Laser transitions; Luminescence; Optical pumping; Optical recording; Probability; Pump lasers;
Conference_Titel :
Lasers and Electro-Optics Europe, 2003. CLEO/Europe. 2003 Conference on
Print_ISBN :
0-7803-7734-6
DOI :
10.1109/CLEOE.2003.1312117
