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Your search keyword '"Südmeyer, T."' showing total 401 results
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401 results on '"Südmeyer, T."'

1. 300-mW average power in 22-fs pulses from a multi-mode diode pumped Yb:CALGO oscillator

Author

Trawi F., Drs J., Müller M., Hamrouni M., Wittwer V.J., and Südmeyer T.

Subjects
Physics, QC1-999
Abstract

We present a multi-mode diode-pumped Yb:CALGO laser oscillator based on cross-polarization pumping. Using this method, we demonstrate 22-fs pulses at 0.3 W, which is the shortest duration for any Yb- based bulk laser oscillator utilizing multimode-diode pumping.

Published
2024
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2. A Kerr polarization controller

Author

Moroney, N., Del Bino, L., Zhang, S., Woodley, M. T. M., Hill, L., Wildi, T., Wittwer, V. J., Südmeyer, T., Oppo, G.-L., Vanner, M. R., Brasch, V., Herr, T., and Del’Haye, P.

Published
2022
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12. All-optical Kerr Polarization Controller

Author

Moroney, N., primary, Del Bino, L., additional, Zhang, S., additional, Woodley, M. T. M., additional, Hill, L., additional, Wildi, T., additional, Wittwer, V. J., additional, Südmeyer, T., additional, Oppo, G.-L., additional, Vanner, M., additional, Brasch, V., additional, Herr, T., additional, and Del’Haye, P., additional

Published
2022
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13. Coherently-averaged dual comb spectrometer at 7.7 µm with master and follower quantum cascade lasers

Author

Komagata, K., primary, Shehzad, A., additional, Terrasanta, G., additional, Brochard, P., additional, Matthey, R., additional, Gianella, M., additional, Jouy, P., additional, Kapsalidis, F., additional, Shahmohammadi, M., additional, Beck, M., additional, Wittwer, V. J., additional, Faist, J., additional, Emmenegger, L., additional, Südmeyer, T., additional, Hugi, A., additional, and Schilt, S., additional

Published
2021
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26. Self-Referenced CEO Frequency Detection of a 10-GHz Laser Enabled by Highly Efficient Nonlinear Waveguides

Author

Krüger, L. M., primary, Mayer, A. S., additional, Okawachi, Y., additional, Ji, X., additional, Klenner, A., additional, Johnson, A. R., additional, Langrock, C., additional, Fejer, M.M., additional, Lipson, M., additional, Gaeta, A. L., additional, Wittwer, V. J., additional, Südmeyer, T., additional, Phillips, C. R., additional, and Keller, U., additional

Published
2020
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28. Vertical integration of ultrafast semiconductor lasers

Author

Maas, D.J.H.C., Bellancourt, A.-R, Rudin, B., Golling, M., Unold, H.J., Südmeyer, T., Keller, U., Maas, D.J.H.C., Bellancourt, A.-R, Rudin, B., Golling, M., Unold, H.J., Südmeyer, T., and Keller, U.

Abstract

Lasers generating short pulses - referred to as ultrafast lasers - enable many applications in science and technology. Numerous laboratory experiments have confirmed that ultrafast lasers can significantly increase telecommunication data rates [1], improve computer interconnects, and optically clock microprocessors [2, 3]. New applications in metrology [4], supercontinuum generation [5], and life sciences with two-photon microscopy [6] only work with ultrashort pulses but have relied on bulky and complex ultrafast solid-state lasers. Semiconductor lasers are ideally suited for mass production and widespread applications, because they are based on a wafer-scale technology with a high level of integration. Not surprisingly, the first lasers entering virtually every household were semiconductor lasers in compact disk players. Here we introduce a new concept and make the first feasibility demonstration of a new class of ultrafast semiconductor lasers which are power scalable, support both optical and electrical pumping and allow for wafer-scale fabrication. The laser beam propagates vertically (perpendicularly) through the epitaxial layer structure which has both gain and absorber layers integrated. In contrast to edge-emitters, these lasers have semiconductor layers that can be optimized separately by using different growth parameters and with no regrowth. This is especially important to integrate the gain and absorber layers, which require different quantum confinement. A saturable absorber is required for pulse generation and we optimized its parameters with a single self-assembled InAs quantum dot layer at low growth temperatures. We refer to this class of devices as modelocked integrated external-cavity surface emitting lasers (MIXSEL). Vertical integration supports a diffraction-limited circular output beam, transform-limited pulses, lower timing jitter, and synchronization to an external electronic clock. The pulse repetition rate scales from 1-GHz to 100-GHz by

Published
2018

29. On the design of electrically pumped vertical-external-cavity surface-emitting lasers

Author

Kreuter, P., Witzigmann, B., Maas, D.J.H.C., Barbarin, Y., Südmeyer, T., Keller, U., Kreuter, P., Witzigmann, B., Maas, D.J.H.C., Barbarin, Y., Südmeyer, T., and Keller, U.

Abstract

Vertical-external-cavity surface-emitting lasers (VECSELs) yield an excellent beam quality in conjunction with a scalable output power. This paper presents a detailed numerical analysis of electrically pumped VECSEL (EP-VECSEL) structures. Electrical pumping is a key element for compact laser devices. We consider the optical loss, current confinement, and device resistance. The main focus of our investigation is on the achievement of an adequate radial carrier distribution for fundamental transverse mode operation. It will be shown that a trade off between the conflicting optical and electrical optimization has to be found and we derive an optimized design resulting in guidelines for the design of EP-VECSELs which are compatible with passive mode locking

Published
2018

30. High harmonic generation in a gas-filled hollow-core photonic crystal fiber

Author

Heckl, O., Baer, C., Kränkel, C., Marchese, S., Schapper, F., Holler, M., Südmeyer, T., Robinson, J., Tisch, J., Couny, F., Light, P., Benabid, F., Keller, U., Heckl, O., Baer, C., Kränkel, C., Marchese, S., Schapper, F., Holler, M., Südmeyer, T., Robinson, J., Tisch, J., Couny, F., Light, P., Benabid, F., and Keller, U.

Abstract

High harmonic generation (HHG) of intense infrared laser radiation (Ferray et al., J. Phys. B: At. Mol. Opt. Phys. 21:L31, 1988; McPherson et al., J. Opt. Soc. Am. B 4:595, 1987) enables coherent vacuum-UV (VUV) to soft-X-ray sources. In the usual setup, energetic femtosecond laser pulses are strongly focused into a gas jet, restricting the interaction length to the Rayleigh range of the focus. The average photon flux is limited by the low conversion efficiency and the low average power of the complex laser amplifier systems (Keller, Nature 424:831, 2003; Südmeyer et al., Nat. Photonics 2:599, 2008; Röser et al., Opt. Lett. 30:2754, 2005; Eidam et al., IEEE J. Sel. Top. Quantum Electron. 15:187, 2009) which typically operate at kilohertz repetition rates. This represents a severe limitation for many experiments using the harmonic radiation in fields such as metrology or high-resolution imaging. Driving HHG with novel high-power diode-pumped multi-megahertz laser systems has the potential to significantly increase the average photon flux. However, the higher average power comes at the expense of lower pulse energies because the repetition rate is increased by more than a thousand times, and efficient HHG is not possible in the usual geometry. So far, two promising techniques for HHG at lower pulse energies were developed: external build-up cavities (Gohle et al., Nature 436:234, 2005; Jones et al., Phys. Rev. Lett. 94:193, 2005) and resonant field enhancement in nanostructured targets (Kim et al., Nature 453:757, 2008). Here we present a third technique, which has advantages in terms of ease of HHG light extraction, transverse beam quality, and the possibility to substantially increase conversion efficiency by phase-matching (Paul et al., Nature 421:51, 2003; Ren et al., Opt. Express 16:17052, 2008; Serebryannikov et al., Phys. Rev. E (Stat. Nonlinear Soft Matter Phys.) 70:66611, 2004; Serebryannikov et al., Opt. Lett. 33:977, 2008; Zhang et al., Nat. Phys. 3:270, 20

Published
2018

31. Sub-100 femtosecond pulses from a SESAM modelocked thin disk laser

Author

Saraceno, C., Heckl, O., Baer, C., Schriber, C., Golling, M., Beil, K., Kränkel, C., Südmeyer, T., Huber, G., Keller, U., Saraceno, C., Heckl, O., Baer, C., Schriber, C., Golling, M., Beil, K., Kränkel, C., Südmeyer, T., Huber, G., and Keller, U.

Abstract

We present the first passively modelocked thin disk laser (TDL) with sub-100-fs pulse duration using the broadband sesquioxide gain material Yb:LuScO3 and an optimized SEmiconductor Saturable Absorber Mirror (SESAM). In this proof-of-principle experiment, we obtained 5.1W of average power at a repetition rate of 77.5MHz and a pulse duration of 96fs. We carefully explored and optimized the different parameters on the soliton pulse formation process for the generation of short pulses. In particular, SESAMs combining fast recovery time, high modulation depth and low nonsaturable losses proved crucial to achieve this result even though they are expected to only play a minor role in soliton modelocking. To our knowledge, these are the shortest pulses ever obtained with a modelocked TDL, reaching for the first time the sub-100-fs milestone. This result opens the door to sub-100-fs oscillators with substantially higher power levels in the near future

Published
2018

35. Extreme Ultraviolet Light Source by High-Harmonic Generation Inside an Ultrafast Thin-Disk Laser

Author

Labaye, F., primary, Gaponenko, M., additional, Wittwer, V. J., additional, Diebold, A., additional, Paradis, C., additional, Modsching, N., additional, Merceron, L., additional, Emaury, F., additional, Graumann, I. J., additional, Phillips, C. R., additional, Saraceno, C. J., additional, Kränkel, C., additional, Keller, U., additional, and Südmeyer, T., additional

Published
2018
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37. Extreme ultraviolet light source at a megahertz repetition rate based on high-harmonic generation inside a mode-locked thin-disk laser oscillator

Author

Labaye, F., primary, Gaponenko, M., additional, Wittwer, V. J., additional, Diebold, A., additional, Paradis, C., additional, Modsching, N., additional, Merceron, L., additional, Emaury, F., additional, Graumann, I. J., additional, Phillips, C. R., additional, Saraceno, C. J., additional, Kränkel, C., additional, Keller, U., additional, and Südmeyer, T., additional

Published
2017
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38. Optimized SESAMs for kilowatt-level ultrafast lasers

Author

Diebold A., Zengerle T., Alfieri C. G. E., Schriber C., Emaury F., Mangold M., Hoffmann M., Saraceno C. J., Golling M., Follman D., Cole G. D., Aspelmeyer M., Südmeyer T., and Keller U.

Abstract

We present a thorough investigation of surface deformation and thermal properties of high-damage threshold large-area semiconductor saturable absorber mirrors (SESAMs) designed for kilowatt average power laser oscillators. We compare temperature rise, thermal lensing, and surface deformation of standard SESAM samples and substrate-removed SESAMs contacted using different techniques. We demonstrate that for all cases the thermal effects scale linearly with the absorbed power, but the contacting technique critically affects the strength of the temperature rise and the thermal lens of the SESAMs (i.e. the slope of the linear change). Our best SESAMs are fabricated using a novel substrate-transfer direct bonding technique and show excellent surface flatness (with non-measureable radii of curvature (ROC), compared to astigmatic ROCs of up to 10 m for standard SESAMs), order-of-magnitude improved heat removal, and negligible deformation with absorbed power. This is achieved without altering the saturation behavior or the recovery parameters of the samples. These SESAMs will be a key enabling component for the next generation of kilowatt-level ultrafast oscillators.

Published
2016

41. High Harmonic Generation (HHG) inside a Modelocked Thin-Disk Laser

Author

Gaponenko, M., primary, Labaye, F., additional, Wittwer, V. J., additional, Paradis, C., additional, Modsching, N., additional, Merceron, L., additional, Diebold, A., additional, Emaury, F., additional, Graumann, I. J., additional, Phillips, C. R., additional, Saraceno, C. J., additional, Kränkel, C., additional, Keller, U., additional, and Südmeyer, T., additional

Published
2017
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42. Compact megahertz coherent XUV generation by HHG inside an ultrafast thin-disk laser

Author

Gaponenko, M., primary, Labaye, F., additional, Wittwer, V. J., additional, Paradis, C., additional, Modsching, N., additional, Merceron, L., additional, Diebold, A., additional, Emaury, F., additional, Graumann, I. J., additional, Phillips, C. R., additional, Saraceno, C. J., additional, Kränkel, C., additional, Keller, U., additional, and Südmeyer, T., additional

Published
2017
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43. Towards Few-Cycle Ultrafast Thin-Disk Lasers

Author

Modsching, N., primary, Paradis, C., additional, Gaponenko, M., additional, Labaye, F., additional, Emaury, F., additional, Diebold, A., additional, Graumann, I., additional, Deppe, B., additional, Kränkel, C., additional, Wittwer, V. J., additional, and Südmeyer, T., additional

Published
2017
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44. SESAM-Modelocked Thin-Disk Laser (TDL) with Intracavity High-Harmonic Generation (HHG)

Author

Labaye, F., primary, Gaponenko, M., additional, Wittwer, V. J., additional, Paradis, C., additional, Modsching, N., additional, Merceron, L., additional, Diebold, A., additional, Emaury, F., additional, Graumann, I. J., additional, Phillips, C. R., additional, Saraceno, C. J., additional, Kränkel, C., additional, Keller, U., additional, and Südmeyer, T., additional

Published
2017
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46. Kagome-type HC-PCF pulse compression: high average power (>100 W), high efficiency and very low noise performance

Author

Emaury, Florian, Diebold, A., Debord, Benoît, Gérôme, Frédéric, Saraceno, Clara, Südmeyer, T., Benabid, Fetah A., Keller, U., Institute of Quantum Electronics, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), PHOTONIQUE (XLIM-PHOTONIQUE), XLIM (XLIM), and Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

47. Hollow-core photonic-crystal fibers for high-power, ultrafast lasers

Author

Saraceno, Clara, Emaury, Florian, Diebold, A., Schriber, Cinia, Debord, Benoît, Gérôme, Frédéric, Südmeyer, T., Benabid, Fetah A., Keller, U., Institute of Quantum Electronics, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), PHOTONIQUE (XLIM-PHOTONIQUE), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Institute of Quantum Electronics [ETH Zürich] (IQE), Department of Physics [ETH Zürich] (D-PHYS), and Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)

Subjects
[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

49. Roadmap on ultrafast optics

Author

Reid, D.T., Heyl, C.M., Thomson, R.R., Trebino, R., Steinmeyer, G., Fielding, H.H., Holzwarth, R., Zhang, Z, DelHaye, P., Südmeyer, T., Mourou, G., Tajima, T., Faccio, D., Harren, F.J.M., G. Cerullo, G., Reid, D.T., Heyl, C.M., Thomson, R.R., Trebino, R., Steinmeyer, G., Fielding, H.H., Holzwarth, R., Zhang, Z, DelHaye, P., Südmeyer, T., Mourou, G., Tajima, T., Faccio, D., Harren, F.J.M., and G. Cerullo, G.

Abstract

Contains fulltext : 166150.pdf (publisher's version ) (Closed access)

Published
2016

50. Pulse compression at 100 W of average power using gas-filled Kagome-type HC-PCF

Author

Emaury, Florian, Saraceno, Clara, Debord, Benoît, Fourcade Dutin, Coralie, Gérôme, Frédéric, Südmeyer, T., Benabid, Fetah A., Keller, U., Institute of Quantum Electronics, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), PHOTONIQUE (XLIM-PHOTONIQUE), XLIM (XLIM), and Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014

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