Abstract

Coumarin 460 transfers radiative energy to disodium fluorescein when solgel silica is doped with the dyes, producing disodium fluorescein lasing in superradiant mode at a 3.3% peak efficiency under low-energy transverse pumping by a 1.5-mJ N2 laser, with disodium fluorescein being present at a concentration below its lasing threshold value.

© 1998 Optical Society of America

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