Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1497052 | Optical Materials | 2007 | 4 Pages |
Abstract
For the first time, a quaternary doping system of Er3+, Yb3+, Ce3+, Na+:CaF2 single crystal was demonstrated to have high fluorescence yield in the eye-safe 1.5 μm region under 980 nm laser diode pumping, with relatively broad and flat gain curves. A simplified model was established to illustrate the effect of Ce3+ on the branching ratio for the Er3+4I11/2 → 4I13/2 transition. With 0.2-at.% Er3+ and 2.0-at.% Ce3+ in the quaternary-doped CaF2 crystal, the branching ratio was estimated to be improved more than 40 times by the deactivating effect of Ce3+ on the Er3+4I11/2 level. The quaternary-doped CaF2 system shows great potential to achieve high laser performance in the 1.5 μm region.
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Authors
Jun Xu, Liangbi Su, Hongjun Li, Dan Zhang, Lei Wen, Hui Lin, Guangjun Zhao,