Abstract

Laser emission of different acid–base species of pyrazino[2,3-c]-1,2,6-thiadiazine 2,2-dioxides has been observed. Lasing energy efficiency and spectral and temporal characteristics in dimethyl sulfoxide (DMSO) and acetonitrile, pumped with a N₂ laser (3.7 ns, 0.5 mJ/pulse) in two different two-mirror resonators, have been measured. A very wide tuning range (110 nm) has been determined in the most efficient species, and the triplet-state influence on the species' laser emission was investigated. No photochemical degradation was detected. The deprotonation observed in DMSO in previous spectroscopic measurements did not contribute measurably to laser emission.

© 1994 Optical Society of America

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