We report a repetition frequency tunable, passively mode-locked vertical-external-cavity surface-emitting semiconductor laser (VECSEL) with continuous repetition frequency tuning between 2.78 and 7.87 GHz using mechanical tuning of the laser cavity length. The laser emits near-transform-limited, sub-500-fs pulses over almost an octave tuning range between… (More)
We report the coherent spectral broadening of a mode-locked VECSEL in normal-dispersion photonic crystal fibers. Subsequent compression produced 150 fs pulses at 270 mW average power or 220 fs pulses at 520 mW average power.
A passively mode-locked optically-pumped InGaAs/GaAs quantum well laser with an intracavity semiconductor saturable absorber mirror emits sub-100-fs pulses. Pulse energy declines steeply as pulse duration is reduced below 100 fs due to gain saturation.
The pulse evolution from onset to steady state in a mode-locked vertical-external-cavity surface-emitting laser producing femtosecond and picosecond pulses was studied. A 40-times reduction in pulse shortening rate from picosecond to femtosecond regime was observed.