Lasing efficiency spectra in dye lasers

摘要

The dependence of lasing efficiency on pumping wavelength in different dye solution lasers are found and studied for the first time. Doubled frequency of titanium-sapphire laser was used as a tunable pumping source. It is shown that maximal value of lasing efficiency is on a longwave shoulder of an absorption spectrum for all studied compounds. A mathematical modeling study was used in order to state the mechanism of lasing efficiency spectra forming. It was shown that these spectra are not due to singlet-singlet or triplet-triplet transient absorption. Such a behavior takes place at high solution concentrations, pumping densities and quality of a cavity.