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Südmeyer, Thomas
Nom
Südmeyer, Thomas
Affiliation principale
Fonction
Directeur
Email
thomas.sudmeyer@unine.ch
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Résultat de la recherche
Voici les éléments 1 - 6 sur 6
- PublicationMétadonnées seulementExperimentally verified pulse formation model for high-power femtosecond VECSELs(2013)
; ; ; Keller, Ursula - PublicationMétadonnées seulementSub-60-fs Timing Jitter of a SESAM Modelocked VECSEL(2013)
; ; Keller, Ursula - PublicationMétadonnées seulementGain characterization and passive modelocking of electrically pumped VECSELs(2012)
; ; Keller, Ursula - PublicationMétadonnées seulementLow repetition rate SESAM modelocked VECSEL using an extendable active multipass-cavity approach(2012)
; ; - PublicationAccès libreExperimentally verified pulse formation model for high-power femtosecond VECSELs
; ; ; Keller, UrsulaOptically pumped vertical-external-cavity surface-emitting lasers (OP-VECSELs), passively modelocked with a semiconductor saturable absorber mirror (SESAM), have generated the highest average output power from any sub-picosecond semiconductor laser. Many applications, including frequency comb synthesis and coherent supercontinuum generation, require pulses in the sub-300-fs regime. A quantitative understanding of the pulse formation mechanism is required in order to reach this regime while maintaining stable, high-average-power performance. We present a numerical model with which we have obtained excellent quantitative agreement with two recent experiments in the femtosecond regime, and we have been able to correctly predict both the observed pulse duration and the output power for the first time. Our numerical model not only confirms the soliton-like pulse formation in the femtosecond regime, but also allows us to develop several clear guidelines to scale the performance toward shorter pulses and higher average output power. In particular, we show that a key VECSEL design parameter is a high gain saturation fluence. By optimizing this parameter, 200-fs pulses with an average output power of more than 1 W should be possible. - PublicationAccès libreSub-60-fs Timing Jitter of a SESAM Modelocked VECSEL
; Keller, UrsulaWe present noise measurements of a pulse train emitted from an actively stabilized semiconductor-saturable-absorber-mirror (SESAM) modelocked vertical external cavity surface emitting laser (VECSEL). The laser generated 6-ps pulses with 2-GHz pulse-repetition rate and 40-mW average output power. The repetition rate was phase locked to a reference source using a piezo actuator. The timing phase noise power spectral density of the laser output was detected with a highly linear photodiode and measured with a signal source analyzer. The resulting RMS timing jitter integrated over an offset frequency range from 1 Hz to 100 MHz gives a value of below 60 fs, lower than previous modelocked VECSELs and comparable with the noise performance of ion-doped solid-state lasers. The RMS amplitude noise was below 0.4% (1 Hz to 40 MHz) and not influenced by the timing phase stabilization.