Abstract

With a 980 nm laser diode pumping, the 2.7 µm emission and energy transfer processes of Er3+/Pr3+ codoped germanium-gallium-bismuthate glasses have been investigated. For Er3+ (1 mol. %) and Pr3+ (1 mol. %) molar concentrations, an intense 2.7 µm emission was obtained based on the high excited-state absorption of Er3+ ions and energy transfer (ET) between Er3+ and Pr3+ ions codopant (ET). The intrinsic lifetime of Er3+:I13/24 level is quenched effectively (from 6.85 ms down to 0.24 ms) and the population inversions between Er3+:I11/24 and I13/24 levels are enhanced to achieve a four-level energy system at 2.7 µm.

© 2012 Optical Society of America

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