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The fluorescence characteristics of Ce 3+ :Er 3+ codoped fluoride glass are reported. It is observed that the decay rate of the 4 I 11/2 state of Er 3+ increased by increasing the Ce 3+ concentration. Further, the branching ratio for the transition from the 4 I 11/2 state to the 4 I 13/2 state of Er 3+ increased from 0.20 to 0.95 by codoping 6.0 mol% Ce 3+ into Er 3+ -doped ZBLAN-H fluoride glass. As a result, the 1.55 µm fluorescence quantum yield has been significantly improved.
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Meng et al. (1999) studied this question.
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