Intensity parameters of Tm3+ and Er3+ in borate,phosphate and germanate glasses |
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Authors: | R. Reisfeld Y. Eckstein |
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Affiliation: | Department of Inorganic and Analytical Chemistry, The Hebrew University, Jerusalem, Israel |
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Abstract: | Intensity parameters τλ of the Judd-Ofelt expression were obtained from oscillator strengths of the electronic transitions of Tm3+ and Er3+ in the visible and infrared part of the spectra. The parameters are interpreted by means of static and dynamic crystal field expansion. The τλ 's of Tm3+, Er3+ and Eu3+ are expressed as a function of the h (covalency parameter) parameter of the glass. It is concluded that vibrational interaction plays a dominant role in the origin of the forced electric dipole transitions of Tm3+ and Er3+ in glasses. |
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