Abstract
We report our observation of the high population relaxation rate β of hyperfine sublevels in 167Er3+ ions doped in a silicate glass fiber (EDF). In contrast to the case with a crystalline Y2SiO5 host, we observed that the β value became two orders higher at 4 K. Furthermore, we observed the decrease in the β value with respect to the increase in the temperature from 4 K to 20 K.
© 2011 Optical Society of America
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