Pumped by an infrared lasing and its frequency-doubling source, the fluores
cence and superradiance emission properties of a new lasing dye trans-4-[4'
-(N,N-diethylamino)-styryl]-N-methyl pyridinium methyl sulfate (abbreviated
DEASPS), have been studied in benzyl alcohol and chloroform. The two-photo
n absorption (TPA) and emission properties of DEASPS are influenced by the
solvents used. The emission wavelength of the dye in benzyl alcohol is reds
hifted relative to that in chloroform. The lifetime of two-photon absorptio
n-induced fluorescence is about 529 ps in benzyl alcohol, whereas it is 340
ps in chloroform. Correspondingly, the one-photon-excited fluorescence lif
etimes in the two solvents are also given. The upconversion efficiency of D
EASPS in chloroform is higher than in benzyl alcohol. Finally, the effectiv
e molecular two-photon absorption cross-sections were measured by the nonli
near transmittance method. It is found that the optical limiting effect of
the dye in benzyl alcohol is stronger than that in chloroform.