Disordered laser gain media:: Er3+ doped CaGdAlO4 and Ca3Ga2Ge4O14

被引:16
作者
Wells, JPR
Han, TPJ
Yamaga, M
Kodama, N
Gallagher, HG
机构
[1] Univ Strathclyde, Dept Phys & Appl Phys, Glasgow G1 1XN, Lanark, Scotland
[2] Gifu Univ, Fac Engn, Dept Elect, Gifu 501, Japan
[3] Akita Univ, Dept Mat Sci & Engn, Fac Engn & Resource Sci, Akita 010, Japan
关键词
erbium; laser spectroscopy; CGA; CGGO;
D O I
10.1016/S0022-2313(99)00552-9
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report on the optical spectroscopy of trivalent erbium ions doped into compositionally disordered oxide host materials, CaGdAlO4 and Ca3Ga2Ge3O14. In either material, averaged spectral linewidths of close to 40 cm(-1) are measured to be concentration independent up to 5 mol% of the dopant ion. For laser excitation resonant with the I-4(15/2) --> F-4(9/2) and I-4(13/2) --> F-4(5/2) and F-4(3/2) transitions, 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. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:1093 / 1095
页数:3
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