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.
© 2010 Optical Society of America
Original Manuscript: January 27, 2010
Revised Manuscript: March 25, 2010
Manuscript Accepted: March 27, 2010
Published: May 5, 2010
Henning Kühn, Klaus Petermann, and Günter Huber, "Correction of reabsorption artifacts in fluorescence spectra by the pinhole method," Opt. Lett. 35, 1524-1526 (2010)