Dr. Mahmoud Abdel Aziz Gaafar Profile

Dr. Mahmoud Abdel Aziz Gaafar

at Technische Univ Hamburg-Harburg

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 19 July 2024 Presentation

Presentation

BLUVES: calibrating astronomical spectrographs in the UV with laser frequency combs

Tobias Schmidt, Markus Ludwig, Furkan Ayhan, Thibault Wildi, Thibault Voumard, Roman Blum, Zhichao Ye, François Wildi, Francesco Alfonso Pepe, Mahmoud Gaafar, Ewelina Obrzud, Davide Grassani, François Moreau, Bruno Chazelas, Rico Sottile, Victor Torres Company, Sylvain Karlen, Steve Lecomte, Victor Brasch, Luis Guillermo Villanueva, François Bouchy, Tobias Herr

Proceedings Volume 13096, 130961J (2024) https://doi.org/10.1117/12.3020169

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Proceedings Article | 20 June 2024 Presentation

Presentation

Astronomical spectrograph calibration with ultraviolet astrocombs

Furkan Ayhan, Markus Ludwig, Tobias Schmidt, Thibault Wildi, Thibault Voumard, Roman Blum, Zhichao Ye, Fuchuan Lei, François Wildi, Francesco Pepe, Mahmoud A. Gaafar, Ewelina Obrzud, Davide Grassani, François Moreau, Bruno Chazelas, Rico Sottile, Victor Torres-Company, Victor Brasch, Luis G. Villanueva, François Bouchy, Tobias Herr

Proceedings Volume PC13004, PC130040N (2024) https://doi.org/10.1117/12.3022133

KEYWORDS: Calibration, Spectrographs, Ultraviolet radiation, Astronomy, Laser frequency, Rubidium, Laser stabilization, Dispersion, Continuous wave operation, Waveguides

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Proceedings Article | 20 June 2024 Presentation

Presentation

Increasing Kerr-comb efficiency through pump recycling in a chip-integrated gain medium

Bastian Ruhnke, Mahmoud Gaafar, Thibault Wildi, Markus Ludwig, Alexander Ulanov, Thibault Voumard, Kai Wang, Milan Sinobad, Jan Lorenzen, Henry Francis, Jose Carreira, Michael Geiselmann, Neetesh Singh, Franz Kärtner, Sonia Garcia-Blanco, Tobias Herr

Proceedings Volume PC13004, PC130040O (2024) https://doi.org/10.1117/12.3023271

KEYWORDS: Solitons, Continuous wave operation, Microresonators, Crystals, Windows, Optical computing, Nonlinear crystals, Lutetium, Laser interferometry, Laser frequency

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Proceedings Article | 19 June 2024 Presentation

Presentation

Chip integrated ultrafast pulse amplification

Mahmoud A. Gaafar, Markus Ludwig, Kai Wang, Thibault Wildi, Thibault Voumard, Milan Sinobad, Jan Lorenzen, Henry Francis, Shuangyou Zhang, Toby Bi, Pascal Del’haye, Michael Geiselmann, Neetesh Singh, Franz Kärtner, Sonia García-Blanco, Tobias Herr

Proceedings Volume PC13012, PC130120C (2024) https://doi.org/10.1117/12.3017600

KEYWORDS: Ultrafast phenomena, Femtosecond phenomena, Waveguides, Photonics, Dispersion, Wave propagation, Semiconductors, Optical amplifiers, Integrated photonics, Integrated optics

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Proceedings Article | 17 March 2023 Presentation

Presentation

Ultrashort soliton pulses in integrated Fabry-Perot microresonators

Tobias Herr, Thibault Wildi, Mahmoud Gaafar, Thibault Voumard, Markus Ludwig

Proceedings Volume PC12424, PC124240L (2023) https://doi.org/10.1117/12.2650705

KEYWORDS: Microresonators, Solitons, Fabry–Perot interferometers, Dispersion, Waveguides, Ultrafast lasers, Spectrographs, Spectral calibration, Space mirrors, Resonators

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Proceedings Article | 14 April 2020 Presentation + Paper

Presentation + Paper

Front induced transitions: refractive index fronts in dispersive waveguides

Mahmoud Gaafar, Hagen Renner, Toshihiko Baba, Manfred Eich, Alexander Yu. Petrov

Proceedings Volume 11358, 113581H (2020) https://doi.org/10.1117/12.2555751

KEYWORDS: Dispersion, Waveguides, Refractive index, Wave propagation, Photonics, Modulation

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Proceedings Article | 13 April 2020 Presentation + Paper

Presentation + Paper

Optical push broom in a silicon waveguide

Mahmoud Gaafar, He Li, Xinlun Cai, Juntao Li, Manfred Eich, Alexander Yu. Petrov

Proceedings Volume 11358, 113580D (2020) https://doi.org/10.1117/12.2555758

KEYWORDS: Waveguides, Dispersion, Silicon, Refractive index, Wave propagation, Silicon photonics

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Proceedings Article | 2 March 2020 Paper

Paper

Linear Schrödinger equation for front-induced transitions close to the band edge

Mahmoud Gaafar, Hagen Renner, Alexander Yu. Petrov, Manfred Eich

Proceedings Volume 11274, 1127404 (2020) https://doi.org/10.1117/12.2540478

KEYWORDS: Dispersion, Waveguides, Wave propagation, Refractive index, Photonic crystals, Terahertz radiation, Geometrical optics, Light wave propagation, Photonic crystal fibers

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Proceedings Article | 26 February 2020 Paper

Paper

Optical reflection from a free carrier-induced front in a slow light waveguide

Mahmoud Gaafar, Dirk Jalas, Liam O’Faolain, Juntao Li, Thomas Krauss, Alexander Yu. Petrov, Manfred Eich

Proceedings Volume 11285, 112850R (2020) https://doi.org/10.1117/12.2540480

KEYWORDS: Waveguides, Photonics, Dispersion, Silicon, Refractive index, Slow light, Plasma, Wave propagation, Signal processing

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Proceedings Article | 25 February 2020 Paper

Paper

Front induced transitions in slow light and dispersive waveguides

Mahmoud A. Gaafar, Toshihiko Baba, Manfred Eich, Alexander Yu. Petrov

Proceedings Volume 11296, 112962O (2020) https://doi.org/10.1117/12.2540476

KEYWORDS: Dispersion, Waveguides, Wave propagation, Refractive index, Photonics, Slow light, Dielectrics, Modulation, Switching, Photonic crystals

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Proceedings Article | 4 March 2019 Paper

Paper

Linear Schrödinger equation with temporal evolution for front-induced indirect transitions in highly dispersive waveguides

Mahmoud Gaafar, Hagen Renner, Alexander Yu. Petrov, Manfred Eich

Proceedings Volume 10921, 109211Z (2019) https://doi.org/10.1117/12.2508831

KEYWORDS: Dispersion, Waveguides, Wave propagation, Terahertz radiation, Photonic crystals, Geometrical optics, Light wave propagation, Refractive index, Picosecond phenomena, Dielectrics

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Proceedings Article | 4 March 2019 Paper

Paper

Front-induced intraband indirect photonic transition in slow-light waveguide

Mahmoud Gaafar, Dirk Jalas, Liam O’Faolain, Juntao Li, Thomas Krauss, Alexander Yu. Petrov, Manfred Eich

Proceedings Volume 10921, 109211Y (2019) https://doi.org/10.1117/12.2508809

KEYWORDS: Waveguides, Dispersion, Refractive index, Silicon, Slow light, Solids, Geometrical optics, Signal processing, Wave propagation, Photonic crystals

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Proceedings Article | 10 March 2016 Paper

Paper

Self-mode-locked vertical-external-cavity surface-emitting laser

Arash Rahimi-Iman, Mahmoud Gaafar, Christoph Möller, Max Vaupel, Fan Zhang, Dalia Al-Nakdali, Ksenia Fedorova, Wolfgang Stolz, Edik Rafailov, Martin Koch

Proceedings Volume 9734, 97340M (2016) https://doi.org/10.1117/12.2216469

KEYWORDS: Semiconductor lasers, Semiconductors, Mode locking, Disk lasers, Laser optics, Ultrafast phenomena, Optical semiconductors, Mirrors, Quantum wells, Pulsed laser operation, Refractive index, Continuous wave operation

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Proceedings Article | 10 March 2016 Paper

Paper

A serially-connected two-chip VECSEL for dual-wavelength emission with high intracavity power

Fan Zhang, Mahmoud Gaafar, Christoph Möller, Wolfgang Stolz, Martin Koch, Arash Rahimi-Iman

Proceedings Volume 9734, 973414 (2016) https://doi.org/10.1117/12.2211607

KEYWORDS: Semiconductor lasers, Disk lasers, Continuous wave operation, Semiconductors, Wavelength tuning, High power lasers, Laser applications, Frequency conversion, Terahertz sources, Mirrors, Second-harmonic generation, Crystals, Optical filters, Terahertz radiation, Quantum wells, Dispersion, Nonlinear crystals

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Proceedings Article | 4 March 2015 Paper

Paper

Recent advances in the field of vertical-external-cavity surface-emitting lasers

Arash Rahimi-Iman, Mahmoud Gaafar, Dalia Al Nakdali, Christoph Möller, Fan Zhang, Matthias Wichmann, Mohammad Shakfa, Ksenia Fedorova, Wolfgang Stolz, Edik Rafailov, Martin Koch

Proceedings Volume 9349, 934906 (2015) https://doi.org/10.1117/12.2079182

KEYWORDS: Mode locking, Quantum wells, Mirrors, Semiconductor lasers, Pulsed laser operation, Second-harmonic generation, Picosecond phenomena, Semiconductors, Diamond, Frequency conversion

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Showing 5 of 15 publications

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