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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 - 10 sur 140
- PublicationMétadonnées seulementHighly efficient optically pumped vertical-emitting semiconductor laser with more than 20 W average output power in a fundamental transverse mode(2008)
; ; Keller, Ursula - PublicationAccès libreKerr lens mode-locked Yb:CALGO thin-disk laser
; ; ; - PublicationMétadonnées seulementFemtosecond diode-pumped solid-state laser with a repetition rate of 4.8 GHz(2012)
; - PublicationMétadonnées seulementDiode-pumped gigahertz femtosecond Yb: KGW laser with a peak power of 3.9 kW(2010)
; Keller, Ursula - PublicationAccès 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 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 libreActive linewidth-narrowing of a mid-infrared quantum cascade laser without optical referenceWe report on a technique for frequency noise reduction and linewidth-narrowing of a distributed-feedback mid-IR quantum cascade laser (QCL) that does not involve any optical frequency reference. The voltage fluctuations across the QCL are sensed, amplified and fed back to the temperature of the QCL at a fast rate using a near-IR laser illuminating the top of the QCL chip. A locking bandwidth of 300 kHz and a reduction of the frequency noise power spectral density by a factor of 10 with respect to the free-running laser are achieved. From 2 MHz for the free-running QCL, the linewidth is narrowed below 700 kHz (10 ms observation time).
- PublicationAccès libreCoherently-averaged dual comb spectrometer at 7.7 µm with master and follower quantum cascade lasers(2021-6)
; ; ; ; ; - 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)
; Benabid, Fetah - PublicationMétadonnées seulementVertical integration of ultrafast semiconductor lasers(2007)
; Keller, Ursula - PublicationAccès libreCarrier-envelope offset frequency stabilization of a gigahertz semiconductor disk laser
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