Raman scattering investigation of Yb : YAG crystals grown by the Czochralski method
Article first published online: 31 OCT 2003
Copyright © 2003 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 34, Issue 11, pages 882–885, November 2003
How to Cite
Chen, Y. F., Lim, P. K., Lim, S. J., Yang, Y. J., Hu, L. J., Chiang, H. P. and Tse, W. S. (2003), Raman scattering investigation of Yb : YAG crystals grown by the Czochralski method. J. Raman Spectrosc., 34: 882–885. doi: 10.1002/jrs.1069
- Issue published online: 31 OCT 2003
- Article first published online: 31 OCT 2003
- Manuscript Accepted: 9 JUL 2003
- Manuscript Received: 27 MAR 2003
- National Science Council of Roc. Grant Number: NSC90-2623-7-001-003; NSC91-CS-7-001-003.
- crystal growth;
- lattice vibrational mode;
- YAG crystals
Raman spectra of a series of Yb3+-doped YAG crystals were obtained with Yb3+ concentrations up to 100 at.%. Single crystals were successfully grown. No abrupt change of the spectral pattern of the Raman modes as a function of Yb3+ doping concentration was observed. From the spectral changes, it is noted that the Raman peaks shift towards lower wavenumbers in the range <450 cm−1 and towards higher wavenumbers in the range >450 cm−1 with increasing Yb3+ doping concentration. It is proposed that Raman modes with wavenumbers <450 cm−1 are the yttrium or ytterbium ions lattice vibrational modes and that the other phonon peaks can then be assigned to internal modes associated with the (AlO4) tetrahedra of S4 symmetry. The doping concentration of Yb3+ does not influence the spectral properties and lattice vibrations drastically, so that a stable and more efficient Yb : YAG laser may be obtained with highly doped Yb3+ contents. Copyright © 2003 John Wiley & Sons, Ltd.