title: Correction of reabsorption artifacts in fluorescence spectra by the pinhole method.
abstract: Reabsorption of spontaneously emitted photons by optically active ions in a laser material can significantly affect the measured emission spectra. A measurement technique to suppress reabsorpion artifacts in fluorescence spectra is reported. A theoretical description of the method as well as experimental results are presented. In combination with another version of the pinhole method for the determination of reabsorption-free fluorescence lifetimes, this technique allows one to suppress the influence of reabsorption artifacts in emission cross sections calculated by the Füchtbauer-Ladenburg equation.
authors.affiliation: Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany. HKuehn@physnet.uni-hamburg.de
authors.forename: Henning
authors.initials: H
authors.lastname: Kühn
authors.forename: Klaus
authors.initials: K
authors.lastname: Petermann
authors.forename: Günter
authors.initials: G
authors.lastname: Huber