This paper deals with the excitation and decay of excited state of holmium in LiTaO₃ single crystals. Particular attention is paid to processes governing a population build up on the ⁵S₂ and ⁵I₇ metastable states whose quantum efficiencies are sufficiently high to be considered as initial levels for a laser transition. We observed for the first time, to our knowledge, an efficient conversion of the 647.1 nm light of a krypton ion laser into green luminescence in the material studied. Based upon analysis of excited state relaxation dynamics it is concluded that the mechanism involved is the excited state absorption from the long lived ⁵I₇ level. Efficient single wavelength excitation is due to coincidence of transition energies of the ground state absorption and excited state absorption.

Date Published: 10 August 2001
PDF: 4 pages
Proc. SPIE 4412, International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals, (10 August 2001);

Published in SPIE Proceedings Vol. 4412:
International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals
Antoni Rogalski; Krzysztof Adamiec; Pawel Madejczyk, Editor(s)