Chinese Optics Letters, 2003, 1 (3): 180, Published Online: Jun. 6, 2006
Study on energy up-conversion in Yb, Ho:YAG crystal
Abstract
Optic parameters, such as the probabilities of radiative and non-radiative transition and the crossrelaxation probability between Yb3+ and Ho3+ ions in Yb,Ho:YAG crystal, are calculated on the basis of Judd-Ofelt and Dexter theories. The energy up-conversion process is analyzed by solving the transition rate-equations. The results show that (1) the intensity of the green fluorescence relates to the square of the concentration of the active ions; (2) the intensity increases with the concentration of sensitive ions as well, but the increasing rate goes rather too slow; (3) the efficiency of the energy up-conversion relates with the speed of the energy up-conversion and the quantum efficiency of the transiting from upper levelto lower level.
Lilei Huang, Liangneng Wu, Yanbin Fu. Study on energy up-conversion in Yb, Ho:YAG crystal[J]. Chinese Optics Letters, 2003, 1(3): 180.