Optical Materials, 66, pp. 8-11 Optical Materials, 66, 8-11
ISSN:
0925-3467
Popis:
We report a pump-probe measurement of the lifetime of the 6 H 7/2 multiplet of Sm 3+ :LiYF 4 . A lifetime of 3.1 ± 0.3 ps was inferred for the Y 2 level of the 6 H 7/2 multiplet. This lifetime is two orders of magnitude faster than for a similar energy gap in Nd 3+ :LiYF 4 , and does not follow the prediction of a simple exponential energy-gap law for non-radiative relaxation in this material.