Homogeneous line broadening of optical transitions of ions and molecules in glasses
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Homogeneous broadening effect on temperature dependence of green upconversion luminescence in erbium doped fibers
2013, Journal of LuminescenceCitation Excerpt :The maximum laser output was achieved at 34 K. Line narrowing was mentioned as a possible mechanism for the laser output quenching below this temperature. In RE doped glasses the broadening of the absorption and emission line profiles arises from both the thermally excited low-frequency vibrational modes (homogeneous broadening) and the structural disorder of the host material (inhomogeneous broadening) (see the review work of Macfarlane and Shelby [30]). At room temperature the inhomogeneous and homogeneous linewidths are in the same order of magnitude [31,32].