Abstract
By measuring the emission spectra and the fluorescence lifetime of the 4I13=2
state of Er3+ ions in Gd2SiO5 crystal at different temperatures, the effects of
temperature on the spectra and the lifetime of the 4I13=2 state are investigated.
When the temperature increases, the emission line width for the 4I13=2 -> 4I15=2
transition is broadened, and the main emission lines at 1 596, 1 609, and 1 644 nm
shifte toward shorter wavelengths. The measured lifetime of the 4I13=2 state
decreases from 13.2 to 8.4 ms with temperature increase from 13 to 300 K, which is
mainly due to the temperature dependence of multiphonon relaxation between the
4I13=2 and 4I15=2 states and the changing population distribution among the Stark
levels within the 4I13=2 state. The experimental results imply that low temperature
condition is better for the ~1.6- \mu m laser output.
© 2011 Chinese Optics Letters
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