Options
Wittwer, Valentin
Nom
Wittwer, Valentin
Affiliation principale
Fonction
MaƮtre-assistant
Email
valentin.wittwer@unine.ch
Identifiants
RĆ©sultat de la recherche
21 RĆ©sultats
Voici les ƩlƩments 1 - 10 sur 21
- PublicationAccĆØs libreCarrier-envelope offset frequency stabilization of a gigahertz semiconductor disk laser(2017)
; ; ; ; ; - PublicationAccĆØs libreExtreme ultraviolet light source at a megahertz repetition rate based on high-harmonic generation inside a mode-locked thin-disk laser oscillator(2017)
; ; ; ; - PublicationAccĆØs libreFull stabilization and characterization of an optical frequency comb from a diode-pumped solid-state laser with GHz repetition rate(2017)
; ; ; ; - PublicationAccĆØs libreHigh-power amplification of a femtosecond vertical external-cavity surface-emitting laser in an Yb: YAG waveguide(2017)
; ; ; Calmano, ThomasWe present the amplification of a mode-locked vertical external-cavity surfaceemitting laser (VECSEL) using an Yb:YAG crystalline waveguide as gain medium. The VECSEL seed laser operates at a center wavelength of 1030 nm and generates 300-fs pulses at a repetition rate of 1.77 GHz. An average seed power of 60 mW was launched onto a 8.3 mm long fs-laser written Yb:YAG waveguide pumped by 7.7 W from a 969-nm continuous-wave VECSEL. The amplifier achieves an average output power of up to 2.9 W, corresponding to an amplification factor of 17 dB. Due to gain narrowing, the pulse duration increases to 629 fs. Our results show that crystalline waveguides are a promising technique for the realization of compact multi-watt ultrafast amplifier systems. - PublicationAccĆØs libreFirst investigation of the noise and modulation properties of the carrier-envelope offset in a modelocked semiconductor laser(2016)
; ; ; ; ; ; - PublicationMƩtadonnƩes seulementExperimentally verified pulse formation model for high-power femtosecond VECSELs(2013)
; ; ; Keller, Ursula - PublicationMƩtadonnƩes seulementSub-60-fs Timing Jitter of a SESAM Modelocked VECSEL(2013)
; ; Keller, Ursula - PublicationAccĆØs libreExperimentally verified pulse formation model for high-power femtosecond VECSELs(2013)
; ; ; 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. - PublicationMƩtadonnƩes seulementHigh-power integrated ultrafast semiconductor disk laser: multi-Watt 10 GHz pulse generation(2012)
; ; ; Keller, Ursula - PublicationMƩtadonnƩes seulementVECSEL gain characterization(2012)
; ; ; Keller, Ursula