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Südmeyer, Thomas
Nom
Südmeyer, Thomas
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Email
thomas.sudmeyer@unine.ch
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Voici les éléments 1 - 10 sur 140
- PublicationAccès libreAbsolute frequency referencing in the long wave infrared using a quantum cascade laser frequency comb(2022-4-4)
; ;Gianella, Michele ;Jouy, Pierre ;Kapsalidis, Filippos ;Shahmohammadi, Mehran ;Beck, Mattias; ; ;Hugi, Andreas ;Faist, Jérôme ;Emmenegger, Lukas; 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 µm (1305 cm−1) using a QCL-OFC referenced to a molecular transition. We obtain 1.5·10−10 relative frequency stability (100-s integration time) and 3·10−9 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. - PublicationAccès libreCoherently-averaged dual comb spectrometer at 7.7 µm with master and follower quantum cascade lasers(2021-6)
; ; ;Terrasanta, Giulio; ; ;Gianella, Michele ;Jouy, Pierre ;Kapsalidis, Filippos ;Shahmohammadi Mehran, Mehran ;Beck Matthias, Matthias; ;Faist, Jérôme ;Emmenegger, Lukas; ;Hugi, AndreasWe demonstrate coherent averaging of the multi-heterodyne beat signal between two quantum cascade laser frequency combs in a master-follower configuration. The two combs are mutually locked by acting on the drive current to control their relative offset frequency and by radio-frequency extraction and injection locking of their intermode beat signal to stabilize their mode spacing difference. By implementing an analog common-noise subtraction scheme, a reduction of the linewidth of all heterodyne beat notes by five orders of magnitude is achieved compared to the free-running lasers. We compare stabilization and post-processing corrections in terms of amplitude noise. While they give similar performances in terms of signal-to-noise ratio, real-time processing of the stabilized signal is less demanding in terms of computational power. Lastly, a proof-of-principle spectroscopic measurement was performed, showing the possibility to reduce the amount of data to be processed by three orders of magnitude, compared to the free-running system. - PublicationMétadonnées seulementUltrafast thin-disk laser with 80 ?J pulse energy and 242 W of average power(2014)
;Saraceno, Clara Jody ;Emaury, Florian ;Schriber, Cinia; ;Golling, Matthias; Keller, Ursula - PublicationMétadonnées seulementExperimentally verified pulse formation model for high-power femtosecond VECSELs(2013)
;Sieber, Oliver D; ; ;Mangold, Mario ;Golling, Matthias ;Tilma, Bauke W; Keller, Ursula - PublicationMétadonnées seulementSESAM mode-locked Yb: CaGdAlO< sub> 4 thin disk laser with 62 fs pulse generation(2013)
;Diebold, Andreas ;Emaury, Florian ;Schriber, Cinia ;Golling, Matthias ;Saraceno, Clara Jody; Keller, Ursula - PublicationMétadonnées seulementYb-doped mixed sesquioxides for ultrashort pulse generation in the thin disk laser setup(2013)
;Beil, Kolja ;Saraceno, Clara Jody ;Schriber, Cinia ;Emaury, Florian ;Heckl, Oliver Hubert ;Baer, Cyrill Roman Emmanuel ;Golling, Matthias; ;Keller, UrsulaKränkel, Christian - PublicationMétadonnées seulement
- PublicationMétadonnées seulementBeam delivery and pulse compression to sub-50 fs of a modelocked thin-disk laser in a gas-filled Kagome-type HC-PCF fiber(2013)
;Emaury, Florian ;Dutin, Coralie Fourcade ;Saraceno, Clara Jody ;Trant, Mathis ;Heckl, Oliver Hubert ;Wang, Yang Y ;Schriber, Cinia ;Gerome, Frederic; Benabid, Fetah - PublicationMétadonnées seulementSub-60-fs Timing Jitter of a SESAM Modelocked VECSEL(2013)
; ;van der Linden, R ;Tilma, Bauke W ;Resan, B ;Weingarten, Kurt J; Keller, Ursula - PublicationMétadonnées seulementCutting-edge high-power ultrafast thin disk oscillators(2013)
;Saraceno, Clara Jody ;Schriber, Cinia ;Emaury, Florian ;Heckl, Oliver Hubert ;Baer, Cyrill Roman Emmanuel; ;Beil, Kolja ;Kränkel, Christian ;Golling, Matthias