@article{6060,
  author = {J. P. R. Wells and T. P. J. Han and M. Yamaga and N. Kodama and H. G. Gallagher},
  title = {Disordered laser gain media: Er3+ doped CaGdAlO4 and Ca3Ga2Ge4O14},
  abstract = {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.},
  year = {2000},
  journal = {Journal of Luminescence},
  volume = {87-9},
  pages = {1093-1095},
  month = {May},
  isbn = {0022-2313},
  doi = {10.1016/s0022-2313(99)00552-9},
  language = {eng},
}