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2 July 1998Effects of resonant electron-phonon interactions for RE3+ions in laser crystals
This paper presents a theoretical treatment of electron-phonon interaction problem in the case of quasi resonant interaction for rare earths ions in laser crystals. Expressions for the absorption or emission lineshapes (asymmetries or splittings of zero-phonon lines) are obtained. The theory is applied to explain some spectral features of Yb3+ transitions in YAG; it allows also the estimation of the vibronic coupling strengths, phonon energies and the `unsplit' electronic levels. A new electronic energy level scheme of Yb3+ in YAG is proposed.
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V. N. Enaki, Aurelia Lupei, Voicu Lupei, C. Presura, V. E. Ciobu, "Effects of resonant electron-phonon interactions for RE3+ ions in laser crystals," Proc. SPIE 3405, ROMOPTO '97: Fifth Conference on Optics, (2 July 1998);