Disordered laser gain media: Er3+ doped CaGdAlO4 and Ca3Ga2Ge4O14
Disordered laser gain media: Er3+ doped CaGdAlO4 and Ca3Ga2Ge4O14
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DOI：
10.1016/s0022-2313(99)00552-9
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发表时间：
2000-05
影响因子：
3.6
通讯作者：
J. Wells;T. Han;M. Yamaga;N. Kodama;H. Gallagher
中科院分区：
文献类型：
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作者：
J. Wells;T. Han;M. Yamaga;N. Kodama;H. Gallagher
我们报告的三价铒离子掺杂到组成无序的氧化物基质材料，CaGdAlO 4和Ca 3Ga 2Ge 3 O 14的光谱。在这两种材料中，测得的平均光谱线宽接近40 cm − 1，与掺杂离子的浓度无关，最高可达5 mol%。在4 I15/2→ 4F 9/2和4 I13/2→ 4F 5/2和4F 3/2跃迁的激光激发下，观察到了强烈的蓝色和绿色上转换荧光。上转换激发光谱中的下降归因于辐射能量转移（或自吸收），已知其增强能量存储和上转换。
We report on the optical spectroscopy of trivalent erbium ions doped into compositionally disordered oxide host materials, CaGdAlO4and Ca3Ga2Ge3O14. In either material, averaged spectral linewidths of close to 40cm−1are measured to be concentration independent up to 5 mol% of the dopant ion. For laser excitation resonant with the4I15/2→4F9/2and4I13/2→4F5/2and4F3/2transitions, intense blue and green upconversion fluorescence is observed. Dips in the upconversion excitation spectra are attributable to radiative energy transfer (or self-absorption) which is known to enhance energy storage and upconversion.