Abstract
With a 980 nm laser diode pumping, the 2.7 µm emission and energy transfer processes of codoped germanium-gallium-bismuthate glasses have been investigated. For (1 mol. %) and (1 mol. %) molar concentrations, an intense 2.7 µm emission was obtained based on the high excited-state absorption of ions and energy transfer (ET) between and ions codopant (ET). The intrinsic lifetime of level is quenched effectively (from 6.85 ms down to 0.24 ms) and the population inversions between and levels are enhanced to achieve a four-level energy system at 2.7 µm.
© 2012 Optical Society of America
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