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Wittwer, Valentin
Nom
Wittwer, Valentin
Affiliation principale
Fonction
MaƮtre-assistant
Email
valentin.wittwer@unine.ch
Identifiants
RĆ©sultat de la recherche
Voici les ƩlƩments 1 - 10 sur 37
- PublicationAccĆØs libreAbsolute frequency referencing in the long wave infrared using a quantum cascade laser frequency comb(2022-4-4)
; ; ; ; Optical frequency combs (OFCs) based on quantum cascade lasers (QCLs) have transformed mid-infrared spectroscopy. However, QCL-OFCs have not yet been exploited to provide a broadband absolute frequency reference. We demonstrate this possibility by performing comb-calibrated spectroscopy at 7.7 Āµm (1305 cmā1) using a QCL-OFC referenced to a molecular transition. We obtain 1.5Ā·10ā10 relative frequency stability (100-s integration time) and 3Ā·10ā9 relative frequency accuracy, comparable with state-of-the-art solutions relying on nonlinear frequency conversion. We show that QCL-OFCs can be locked with sub-Hz-level stability to a reference for hours, thus promising their use as metrological tools for the mid-infrared. - PublicationAccĆØs libreCoherently-averaged dual comb spectrometer at 7.7ā Āµm with master and follower quantum cascade lasers(2021-6)
; ; ; ; ; ; - 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 - PublicationMƩtadonnƩes seulementHigh-power integrated ultrafast semiconductor disk laser: multi-Watt 10 GHz pulse generation(2012)
; ; ; Keller, Ursula - PublicationMƩtadonnƩes seulementVECSEL gain characterization(2012)
; ; ; Keller, Ursula - PublicationMƩtadonnƩes seulementGain characterization and passive modelocking of electrically pumped VECSELs(2012)
; ; Keller, Ursula - PublicationMƩtadonnƩes seulementLow repetition rate SESAM modelocked VECSEL using an extendable active multipass-cavity approach(2012)
; ; - PublicationMƩtadonnƩes seulementFemtosecond VECSEL with tunable multi-gigahertz repetition rate(2011)
; ; ; Keller, Ursula - PublicationMƩtadonnƩes seulementFemtosecond high-power quantum dot vertical external cavity surface emitting laser(2011)
; ; ; Keller, Ursula