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Wittwer, Valentin
Nom
Wittwer, Valentin
Affiliation principale
Fonction
Maître-assistant
Email
valentin.wittwer@unine.ch
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Résultat de la recherche
14 Résultats
Voici les éléments 1 - 10 sur 14
- PublicationMétadonnées seulementExperimentally verified pulse formation model for high-power femtosecond VECSELs(2013)
; ; ; Keller, Ursula - PublicationMétadonnées seulementHigh-power integrated ultrafast semiconductor disk laser: multi-Watt 10 GHz pulse generation(2012)
; ; ; Keller, Ursula - PublicationMétadonnées seulementVECSEL gain characterization(2012)
; ; ; Keller, Ursula - PublicationMétadonnées seulementLow repetition rate SESAM modelocked VECSEL using an extendable active multipass-cavity approach(2012)
; ; - PublicationMétadonnées seulementFemtosecond VECSEL with tunable multi-gigahertz repetition rate(2011)
; ; ; Keller, Ursula - PublicationMétadonnées seulementTiming jitter characterization of a free-running SESAM mode-locked VECSEL(2011)
; ; ; Keller, Ursula - PublicationMétadonnées seulementExperimental verification of soliton-like pulse-shaping mechanisms in passively mode-locked VECSELs(2010)
; ; ; Keller, Ursula - PublicationMétadonnées seulementHigh-power MIXSEL: an integrated ultrafast semiconductor laser with 6.4 W average power(2010)
; ; ; Keller, Ursula - PublicationMétadonnées seulementNovel ultrafast semiconductor laser with 6.4 W average output power(2010)
; ; ; Keller, Ursula - 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.