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The pump efficiency of Pr-doped fluorozirconate amplifiers at 1300 nm is limited by nonradiative decay. A Pr/sup 3+1/G4excited state lifetime of 322 μs has been obtained in a mixed-halide glass. This is 2.9 times longer than the lifetime in a fluorozirconate host. Numerical amplifier modeling combined with calculated emission cross sections predicts a comparable increase in amplifier pump efficiency. The mixed-halide1G4emission is peaked at 1310 nm.
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Newhouse et al. (1994) studied this question.
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