DETERMINATION OF THE ABSOLUTE FLUORESCENCE QUANTUM YIELDS OF LASER DYES USING PHOTOACOUSTIC SPECTROSCOPY

Ⅰ. INTRODUCTION Although the absolute fluorescence quantum yield (QY) of a laser dye is an important parameter for both basic theory and application, its accurate determination is rather, complicated and difficult. The measured values reported are usually inconsistent with each other. The reason is that, in a dye solution, the competition of various processes of fluorescence quenching with the fluorescence emission makes the QY sensi-