STUDIES OF PICOSECOND SPECTROTEMPORAL SELECTION LASERS USING DIFFERENT DYES IN MICROCAVITIES WITH A 2-STAGE-ARRANGEMENT

The spectral and temporal characteristics of transient lasing processe s of low-Q microcavities working with different dye solutions are dire ctly and simultaneously measured. The theoretical and experimental res ults obtained allow one to extend the spectre-temporal selection (STS) method to a two-STS stage arrangement and different dyes in order to produce the shortest pulses achievable by this method. Using an 8 ns p ulse pumping and a two-stage arrangement, generation of ca. 2 ps pulse s at the different laser wavelengths is demonstrated. This corresponds to a pulse-shortening factor greater than 3000.