Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Wittwer, Valentin"'
Autor:
Pecile, Vito F., Leskowschek, Michael, Modsching, Norbert, Wittwer, Valentin J., Südmeyer, Thomas, Heckl, Oliver H.
Within the domain of optical frequency comb systems operating in the mid-infrared, extensive exploration has been undertaken regarding critical parameters such as stabilization, coherence, or spectral tunability. Despite this, certain essential param
Externí odkaz:
http://arxiv.org/abs/2403.19360
Autor:
Parriaux, Alexandre, Komagata, Kenichi N., Bertrand, Mathieu, Wittwer, Valentin J., Faist, Jérôme, Südmeyer, Thomas
Publikováno v:
Advanced Photonics Research (2024)
Frequency combs are powerful tools for many applications and high performances are achieved by stabilizing these lasers. For operation in the mid-infrared, quantum cascade lasers (QCL) are ideal candidates as they present numerous advantages. However
Externí odkaz:
http://arxiv.org/abs/2311.04820
Autor:
Komagata, Kenichi N., Parriaux, Alexandre, Bertrand, Mathieu, Hillbrand, Johannes, Beck, Mattias, Wittwer, Valentin J., Faist, Jérôme, Südmeyer, Thomas
Publikováno v:
APL Photonics 8, 086110 (2023)
We demonstrate the use of a low power near-infrared laser illuminating the front facet of a quantum cascade laser (QCL) as an optical actuator for the coherent control of a mid-infrared frequency comb. We show that by appropriate current control of t
Externí odkaz:
http://arxiv.org/abs/2305.01508
Autor:
Komagata, Kenichi N., Wittwer, Valentin J., Südmeyer, Thomas, Emmenegger, Lukas, Gianella, Michele
Quantum cascade laser (QCL) frequency combs have revolutionized mid-infrared (MIR) spectroscopy by their high brightness and fast temporal resolution, and are a promising technology for fully-integrated and cost-effective sensors. As for other integr
Externí odkaz:
http://arxiv.org/abs/2205.03334
Autor:
Hillbrand, Johannes, Bertrand, Mathieu, Wittwer, Valentin, Opacak, Nikola, Kapsalidis, Filippos, Gianella, Michele, Emmenegger, Lukas, Schwarz, Benedikt, Südmeyer, Thomas, Beck, Mattias, Faist, Jérôme
Optical frequency combs based on semiconductor lasers are a promising technology for monolithic integration of dual-comb spectrometers. However, the stabilization of the offset frequency fceo remains a challenging feat due the lack of octave-spanning
Externí odkaz:
http://arxiv.org/abs/2202.09620
Autor:
Moroney, Niall, Del Bino, Leonardo, Zhang, Shuangyou, Woodley, Michael T. M., Hill, Lewis, Wildi, Thibault, Wittwer, Valentin J., Südmeyer, Thomas, Oppo, Gian-Luca, Vanner, Michael. R., Brasch, Victor, Herr, Tobias, Del'Haye, Pascal
Publikováno v:
Nature Communications volume 13, Article number: 398 (2022)
Kerr-effect-induced changes of the polarization state of light are well known in pulsed laser systems. An example is nonlinear polarization rotation, which is critical to the operation of many types of mode-locked lasers. Here, we demonstrate that th
Externí odkaz:
http://arxiv.org/abs/2104.13892
Autor:
Lahijani, Babak Vosoughi, Descharmes, Nicolas, Barbey, Raphael, Osowiecki, Gael D., Wittwer, Valentin J., Razskazovskaya, Olga, Südmeyer, Thomas, Herzig, Hans Peter
Guiding and confining light at interfaces is crucial for applications involving light-matter interactions such as surface spectroscopy, nonlinear optics, and quantum information technology. While dielectric surface waves offer promising perspectives
Externí odkaz:
http://arxiv.org/abs/1907.00187
Autor:
Komagata Kenichi N., Parriaux Alexandre, Bertrand Mathieu, Hillbr Johannes, Wittwer Valentin J., Faist Jérôme, Südmeyer Thomas
Publikováno v:
EPJ Web of Conferences, Vol 287, p 07016 (2023)
Using near-infrared light, we tightly-lock a mid-infrared quantum cascade laser frequency comb to another laser, achieving a residual integrated phase noise of 200 mrad. This high coherence is pertinent for highly-sensitive dual-comb spectroscopy and
Externí odkaz:
https://doaj.org/article/f79fe60cb18f42a388d6b521f0be4765
Autor:
Trawi Firas, Drs Jakub, Müller Michael, Hamrouni Marin, Modsching Norbert, Wittwer Valentin J., Südmeyer Thomas
Publikováno v:
EPJ Web of Conferences, Vol 287, p 08003 (2023)
We demonstrate a multimode diode-pumped Yb:CALGO laser oscillator based on bandwidth-optimized cross-polarization pumping targeting sub-30-fs operation. In our first proof of principle experiment we achieved mode-locked operation at 83 MHz repetition
Externí odkaz:
https://doaj.org/article/c001f18d32834049b5d3c6589d7f17a3
Autor:
Drs Jakub, Müller Michael, Trawi Firas, Modsching Norbert, Wittwer Valentin J., Südmeyer Thomas
Publikováno v:
EPJ Web of Conferences, Vol 287, p 08007 (2023)
Thin-disk laser oscillators can nowadays reach few tens of femtosecond pulses at gigawatt-level intracavity powers and megahertz-repetition rates becoming increasingly more powerful sources for intra-oscillator high harmonic generation (HHG). Current
Externí odkaz:
https://doaj.org/article/0d4350b4874849e19d1a9f728c743976