M
Marwan Abdou Ahmed
Researcher at University of Stuttgart
Publications - 13
Citations - 63
Marwan Abdou Ahmed is an academic researcher from University of Stuttgart. The author has contributed to research in topics: Photonic-crystal fiber & Laser beam quality. The author has an hindex of 4, co-authored 13 publications receiving 44 citations. Previous affiliations of Marwan Abdou Ahmed include International Federation of Social Workers.
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Proceedings ArticleDOI
Laser Spectroscopy of Muonic Atoms and Ions
Randolf Pohl,François Nez,L.M.P. Fernandes,Marwan Abdou Ahmed,F. D. Amaro,Pedro Amaro,François Biraben,João Cardoso,D. S. Covita,Andreas Dax,Andreas Dax,Satish Dhawan,Marc Diepold,Beatrice Franke,Sandrine Galtier,Adolf Giesen,Andrea L. Gouvea,Johannes Götzfried,Thomas Graf,Theodor W. Hänsch,Malte Hildebrandt,Paul Indelicato,Lucile Julien,Klaus Kirch,Klaus Kirch,Andreas Knecht,Paul E. Knowles,Franz Kottmann,Julian J. Krauth,Eric-Olivier Le Bigot,Yi-Wei Liu,Jose A. Matias Lopes,Livia Ludhova,Jorge Machado,C.M.B. Monteiro,Françoise Mulhauser,Tobias Nebel,Paul Rabinowitz,Joaquim M. F. dos Santos,José Paulo Santos,Lukas A. Schaller,Karsten Schuhmann,Karsten Schuhmann,Catherine Schwob,Csilla I. Szabo,David Taqqu,J.F.C.A. Veloso,Andreas Voss,Birgit Weichelt,Aldo Antognini +49 more
TL;DR: Laser spectroscopy of the Lamb shift (2S-2P energy difference) in light muonic atoms or ions, in which one negative muon μ− is bound to a nucleus, has been performed as mentioned in this paper.
Journal ArticleDOI
Preserving Nearly Diffraction-Limited Beam Quality Over Several Hundred Meters of Transmission Through Highly Multimode Fibers
TL;DR: In this paper, the influence of the core diameter and the fiber length on the beam quality of the transmitted beam was investigated theoretically and experimentally for highly multimode step-index fibers with a numerical aperture of 0.22 using a fully monolithic setup.
Journal ArticleDOI
Fiber-integrated spectroscopy device for hot alkali vapor.
Josephine Gutekunst,Daniel Weller,Harald Kübler,Jan-Philipp Negel,Marwan Abdou Ahmed,Thomas Graf,Robert Löw +6 more
TL;DR: An all-glass, vacuum tight, fiber-integrated and alkali compatible spectroscopy device consisting of two conventional optical fibers spliced to each end of a capillary is introduced and it is shown that filling it with highly reactive alkali metals is possible, and that the vapor density can be controlled reliably.
Journal ArticleDOI
Phase Shift Induced Degradation of Polarization Caused by Bends in Inhibited-Coupling Guiding Hollow-Core Fibers
Christian Rohrer,Jonas H. Osório,Frieder Beirow,Martin Maurel,Benoit Debord,Thomas Graf,Frédéric Gérôme,Fetah Benabid,Marwan Abdou Ahmed +8 more
TL;DR: In this article, a comprehensive analysis of the polarization-maintaining (PM) behavior of two different kinds of inhibited-coupling (IC) guiding hollow core fibers and the influence of fiber bends is presented.
Journal ArticleDOI
Analysis of Fundamental-Mode Beam Transport in Highly Multimode Fibers
TL;DR: In this article, the authors present an analysis of the propagation of a nearly diffraction-limited laser beam through 5 to 10m long multimode step-index fibers with a numerical aperture of 0.111 and core diameters of up to 80m.