A
CW or pulsed source of
coherent radiation in which the
active medium is usually a solution of a fluorescent organic molecule (the dye) pumped with a suitable
pump
laser or with a flash
lamp. These lasers can be tuned over a large part of the
fluorescence band of the dye.
Source:
PAC, 1996, 68, 2223
(Glossary of terms used in photochemistry (IUPAC Recommendations 1996))
on page 2237