Abstract
Inhomogeneous broadening typically interferes with the observation of sharp featured fluorescence from organic chromophores dispersed in glasses and polymers. Fluorescence line narrowing (FLN) and nonlinear spectroscopic techniques can be used to obtain site selective spectra in photochemically stable systems but produce ambiguous results when the incident laser induces frequency domain hole burning. The effects of hole burning on the observed line narrowed fluorescence signal are described by introducing a time-dependent site distribution
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