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Südmeyer, Thomas
Résultat de la recherche
Absolute frequency referencing in the long wave infrared using a quantum cascade laser frequency comb
2022-4-4, Komagata, Kenichi N., Gianella, Michele, Jouy, Pierre, Kapsalidis, Filippos, Shahmohammadi, Mehran, Beck, Mattias, Matthey-De-L'Endroit, Renaud, Wittwer, Valentin, Hugi, Andreas, Faist, Jérôme, Emmenegger, Lukas, Südmeyer, Thomas, Schilt, Stephane
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.
Beam 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, Südmeyer, Thomas, Benabid, Fetah
Yb-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, Südmeyer, Thomas, Keller, Ursula, Kränkel, Christian
Cutting-edge high-power ultrafast thin disk oscillators
2013, Saraceno, Clara Jody, Schriber, Cinia, Emaury, Florian, Heckl, Oliver Hubert, Baer, Cyrill Roman Emmanuel, Hoffmann, Martin, Beil, Kolja, Kränkel, Christian, Golling, Matthias, Südmeyer, Thomas
Coherently-averaged dual comb spectrometer at 7.7 µm with master and follower quantum cascade lasers
2021-6, Komagata, Kenichi N., Shehzad, Atif, Terrasanta, Giulio, Brochard, Pierre, Matthey-De-L'Endroit, Renaud, Gianella, Michele, Jouy, Pierre, Kapsalidis, Filippos, Shahmohammadi Mehran, Mehran, Beck Matthias, Matthias, Wittwer, Valentin, Faist, Jérôme, Emmenegger, Lukas, Südmeyer, Thomas, Hugi, Andreas, Schilt, Stephane
We 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.
Active linewidth-narrowing of a mid-infrared quantum cascade laser without optical reference
2013, Tombez, Lionel, Schilt, Stephane, Hofstetter, D, Südmeyer, Thomas
SESAM 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, Südmeyer, Thomas, Keller, Ursula
Ultrafast thin-disk laser with 80 ?J pulse energy and 242 W of average power
2014, Saraceno, Clara Jody, Emaury, Florian, Schriber, Cinia, Hoffmann, Martin, Golling, Matthias, Südmeyer, Thomas, Keller, Ursula
CEO stabilization of a femtosecond laser using a SESAM as fast opto-optical modulator
2013, Hoffmann, Martin, Schilt, Stephane, Südmeyer, Thomas
Ultra-stable microwave generation with a diode-pumped solid-state laser in the 1.5-?m range
2013, Dolgovskiy, Vladimir, Schilt, Stephane, Bucalovic, Nikola, Di Domenico, Gianni, Grop, Serge, Dubois, Benoît, Giordano, Vincent, Südmeyer, Thomas