Dependence of lasing efficiency on excitation frequency in the pumping of a rhodamine 6G solution by laser pulses of microsecond duration

摘要

We have revealed an anomalous dependence of the lasing characteristics of an ethanol solution of rhodamine 6G on the spectral composition of the exciting radiation due to the structure of the excited singlet-singlet absorption spectra and the absorption spectra of short-lived photoexcitation products. Elucidation of the influence of the indicated characteristics makes it possible to select optimum pumping spectra and increase the efficiency and stability of the spectral characteristics of dye-laser systems operating in the microsecond and nanosecond wavelength ranges.