Determination of homogeneous spectral widths by fluorescence line narrowing in Ca(PO3)2:Eu3+

Abstract

Homogeneous spectral widths are determined for inhomogeneously broadened transitions of the ${\mathrm{Eu}}^{3+}$ ion in Ca${\left(\mathrm{P}{\mathrm{O}}_3\right)}_2$ glass by observing resonance fluorescence lines under monochromatic dye-laser excitation. A Lorentzian profile of the emission line measured is consistent with the existing theory. Effects of spectral diffusion and strain broadening on the fluorescence narrowing are discussed.