Dr. Gerhard G. Paulus Profile

Dr. Gerhard G. Paulus

at Friedrich-Schiller-Univ Jena

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 8 June 2023 Poster

Poster

Correlative soft X-ray and fluorescence microscopy in the water window region in an integrated laboratory-based setup

Sophia Kaleta, Julius Reinhard, Felix Wiesner, Johann Jakob Abel, Martin Wünsche, Martin Westermann, Eric Seemann, Katharina Reglinski, Christian Franke, Alexander Iliou, Falk Hillmann, Christian Eggeling, Silvio Fuchs, Gerhard G. Paulus

Proceedings Volume PC12582, PC125820U (2023) https://doi.org/10.1117/12.2666161

KEYWORDS: X-rays, X-ray microscopy, Windows, X-ray fluorescence spectroscopy, Fluorescence microscopy, Microscopy, Fluorescence, X-ray imaging, Synchrotrons, Stars

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Proceedings Article | 1 April 2022 Presentation

Presentation

Sub-2-cycle carrier-envelope-phase-stable laser providing 1.1-mJ pulses at 110 W average power

Steffen Hädrich, Maxim Tschernajew, Evgeny Shestaev, Fabian Stutzki, Nico Walther, Florian Just, Florian Karl, Sven Breitkopf, Christian Gaida, Oliver Herrfurth, Imre Seres, Zsolt Bengery, Barnabas Gilicze, Péter Jójárt, Zoltán Várallyay, Ádám Börzsönyi, Michael Müller, Christian Grebing, Dominik Hoff, Gerhard Paulus, Tino Eidam, Jens Limpert

Proceedings Volume PC11991, PC119910N (2022) https://doi.org/10.1117/12.2608672

KEYWORDS: Pulsed laser operation, Laser systems engineering, Optical amplifiers, Mirrors, Laser applications, Fiber amplifiers, Energy efficiency, Dielectric mirrors

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Proceedings Article | 30 December 2019 Paper

Paper

Multi-spot focal pattern formation and beam reshaping by mixing square-shaped and hexagonal vortex lattices

L. Stoyanov, G. Maleshkov, M. Zhekova, I. Stefanov, G. Paulus, A. Dreischuh

Proceedings Volume 11332, 113320J (2019) https://doi.org/10.1117/12.2554013

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Proceedings Article | 9 September 2019 Presentation

Presentation

XUV coherence tomography: a novel approach to nanoscale 3D imaging (Conference Presentation)

Martin Wünsche, Silvio Fuchs, Jan Nathanael, Johann Abel, Julius Reinhard, Felix Wiesner, Slawomir Skruszewicz, Christian Rödel, Gerhard Paulus

Proceedings Volume 11112, 111120U (2019) https://doi.org/10.1117/12.2528684

KEYWORDS: Extreme ultraviolet, Tomography, Optical coherence tomography, Coherence (optics), Stereoscopy, Silicon, Visible radiation, Near infrared, Spectral resolution, Light sources

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Proceedings Article | 9 June 2017 Presentation

Presentation

Performance tests of the 5 TW, 1 kHz, passively CEP-stabilized ELI-ALPS SYLOS few-cycle laser system (Conference Presentation)

Tomas Stanislauskas, Rimantas Budriūnas, Gediminas Veitas, Darius Gadonas, Jonas Adamonis, Aidas Aleknavičius, Gžegož Masian, Zenonas Kuprionis, Dominik Hoff, Gerhard Paulus, Ádám Börzsönyi, Szabolcs Toth, Mate Kovacs, János Csontos, Rodrigo López-Martens, Károly Osvay

Proceedings Volume 10238, 102380S (2017) https://doi.org/10.1117/12.2265775

KEYWORDS: Laser systems engineering, Plasma systems, Reliability, Picosecond phenomena, Light, Light sources, Plasma, Laser applications, Standards development, Glasses

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ELI-ALPS in Hungary, one of the three pillars of the Extreme Light Infrastructure, aims at providing diverse light sources, including energetic attosecond pulses at the highest possible repetition rates. One of the main laser systems for driving plasma and gas-based HHG stages, is a state-of-the-art 1 kHz few-cycle laser called SYLOS. Targeted pulse parameters are an energy of 100 mJ and a duration shorter than two optical cycles (<6 fs), with outstanding energy, phase and pointing stability as well as high spatiotemporal quality. The first phase of the laser system has already set a new standard in kHz laser system engineering and technology. The performance and reliability of the SYLOS laser have been consistently tested over the course of a six-month trial period. During this time the system was running at least 8 hours a day at full power for more than 5 months. The current output parameters are 5 TW peak power, 45 mJ pulse energy with 9 fs duration and 300 mrad CEP stability, while the spectrum spans over 300 nm around 840 nm central wavelength. The layout follows the general scheme NOPCPA architecture with a passively CEP-stabilized front-end. The pulses are negatively chirped for the amplification process and compressed by a combination of large aperture bulk glass blocks and positively chirped mirrors under vacuum conditions at the output. During the trial period, the laser system demonstrated outstanding reliability. Daily startup and shutdown procedures take only a few minutes, and the command-control system enables pulse parameters to be modified instantly. Controlling the delays of individual NOPCPA stages makes it possible to tailor the output spectrum of the pulses and tune the central wavelength between 770 nm and 940 nm. We performed several experimental tests to find out the pulse characteristics. Pulse duration was verified with Wizzler, chirp-scan, autocorrelation methods and a stereo-ATI independently. All of them confirmed the sub-9 fs pulse duration. We recorded the long-term waveform and pointing stabilities of the beam in order to find out the effect of the temperature load on optical elements. Excluding a short initial warm up time, stable signals were observed in general. The in-loop and out-of-loop CEP stability was cross-checked between f-to-2f and stereo-ATI devices. Moreover, the inherent CEP stability of the system without feedback loop was also found to be surprisingly robust thanks to the passive CEP stabilization of the front-end. The polarization contrast was better than 1000:1. The temporal contrast was also measured independently with Sequoia and Tundra cross-correlators, and on the ns scale with a fast photodiode and GHz oscilloscope as well. Results showed that the pulse pedestal generally consists of parametric superfluorescence below the 1E-7 level and about 100 ps long, well in accordance with the pump duration. Delaying the pump pulse allows us to shift the seed pulse to the front and reach a pre-pulse pedestal below 1E-11 at 30 ps before the pulse peak. Detailed findings on all the examined pulse characteristics of the SYLOS laser will be reported in this presentation.

Proceedings Article | 8 January 2015 Paper

Paper

Evaluation of pulse front tilt measurement of femtosecond laser pulses

N. Dimitrov, L. Stoyanov, I. Stefanov, A. Dreischuh, P. Hansinger, G. Paulus

Proceedings Volume 9447, 94471E (2015) https://doi.org/10.1117/12.2180268

KEYWORDS: Pulmonary function tests, Optical correlators, Femtosecond phenomena, Interferometers, Diffraction gratings, Interferometry, Mirrors, CCD cameras, Ultrafast phenomena, Crystals

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Proceedings Article | 9 May 2013 Paper

Paper

700 J THz pulses from a laser-driven particle accelerator

Amrutha Gopal, Torsten May, Pushkar Singh, Sven Herzer, Wolfgang Ziegler, Gerhard Paulus, Albrecht Schmidt, Andreas Reinhard, Ulrich Dillner, Hans-Georg Meyer, Anupam Karmakar, Dirk Broemmel, Paul Gibbon

Proceedings Volume 8779, 87791Z (2013) https://doi.org/10.1117/12.2017254

KEYWORDS: Terahertz radiation, Mirrors, Solids, Pulsed laser operation, Particle accelerators, Laser energy, Plasmas, Electrons, Sensors, Ions

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Proceedings Article | 15 March 2013 Paper

Paper

Branching probe beams by fractional vortex dipoles: guiding vs. anti-guiding

G. Maleshkov, P. Hansinger, N. Dimitrov, A. Dreischuh, G. Paulus

Proceedings Volume 8770, 87701K (2013) https://doi.org/10.1117/12.2016385

KEYWORDS: Laser beam diagnostics, Spiral phase plates, Spatial solitons, Waveguides, Beam propagation method, Beam splitters, Nonlinear optics, Wave propagation, Modulation, Process control

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Proceedings Article | 11 February 2011 Paper

Paper

Versatile approach for frequency resolved wavefront characterization

Eugene Frumker, Gerhard Paulus, Hiromichi Niikura, David Villeneuve, Paul Corkum

Proceedings Volume 7925, 79250U (2011) https://doi.org/10.1117/12.886304

KEYWORDS: Wavefronts, Diffraction, Extreme ultraviolet, Spectroscopy, Optical testing, Microchannel plates, X-ray lasers, X-rays, Free electron lasers, Phase measurement

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Proceedings Article | 18 January 2011 Paper

Paper

Degenerate four-wave mixing of optical vortices assisted by self-phase and cross-phase modulation

G. Maleshkov, P. Hansinger, I. Garanovich, D. Skryabin, D. Neshev, A. Dreischuh, G. Paulus

Proceedings Volume 7747, 77471E (2011) https://doi.org/10.1117/12.881860

KEYWORDS: Spiral phase plates, Optical vortices, Modulation, Signal generators, Wave propagation, Four wave mixing, Phase shift keying, Scanning probe microscopy, Technetium, Physics

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Proceedings Article | 18 January 2011 Paper

Paper

Fractional vortex dipoles of edge-screw type in self-focusing Kerr nonlinear media

G. Maleshkov, P. Hansinger, A. Dreischuh, G. Paulus

Proceedings Volume 7747, 77471P (2011) https://doi.org/10.1117/12.881862

KEYWORDS: Spiral phase plates, Nonlinear optics, Decision support systems, Waveguides, Solids, Process control, Spatial solitons, Quantum electronics, Physics, Optical vortices

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Proceedings Article | 22 April 2005 Paper

Paper

Phase dislocations in femtosecond laser fields

Kalojan Bezuhanov, Aleksander Dreischuh, G. Paulus, Herbert Walther

Proceedings Volume 5830, (2005) https://doi.org/10.1117/12.618466

KEYWORDS: Computer generated holography, Spiral phase plates, Femtosecond phenomena, Optical vortices, Diffraction gratings, Oscillators, Quantum electronics, Sapphire lasers, Mode locking

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Proceedings Article | 21 June 2004 Paper

Paper

Vortices in femtosecond laser fields

K. Bezuhanov, Aleksander Dreischuh, G. Paulus, M. Schaetzel, Herbert Walther

Proceedings Volume 5449, (2004) https://doi.org/10.1117/12.563108

KEYWORDS: Computer generated holography, Spiral phase plates, Femtosecond phenomena, Optical vortices, Diffraction gratings, Oscillators, Sapphire lasers, Mode locking, Mirrors

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Proceedings Article | 4 November 2003 Paper

Paper

Dispersion control in a 100-kHz repetition rate 35-fs laser system

F. Lindner, M. Schaetzel, F. Grasbon, Aleksander Dreischuh, G. Paulus, Herbert Walther

Proceedings Volume 5226, (2003) https://doi.org/10.1117/12.518891

KEYWORDS: Prisms, Mirrors, Spatial light modulators, Amplifiers, Modulators, Laser systems engineering, Optical amplifiers, Liquid crystals, Glasses, Laser applications

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Proceedings Article | 4 November 2003 Paper

Paper

Generation of lattices of optical vortices

Aleksander Dreischuh, S. Chervenkov, Dragomir Neshev, G. Paulus, Herbert Walther

Proceedings Volume 5226, (2003) https://doi.org/10.1117/12.519084

KEYWORDS: Diffraction, Laser beam diagnostics, Technetium, Optical vortices, Refractive index, Diffraction gratings, Modulation, Spiral phase plates, Computer generated holography, Laser beam propagation

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Proceedings Article | 9 April 2001 Paper

Paper

Multiple-charged optical vortex solitons: existence and stability in saturable Kerr-type nonlinear media

Aleksander Dreischuh, G. Paulus, Dragomir Neshev, F. Grasbon, Herbert Walther

Proceedings Volume 4397, (2001) https://doi.org/10.1117/12.425132

KEYWORDS: Solitons, Computer generated holography, Optical vortices, Technetium, Nonlinear optics, Numerical simulations, Spiral phase plates, Modulation, Binary data, Spatial frequencies

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Proceedings Article | 9 April 2001 Paper

Paper

Directional coupling and branching of optical signals by dark beams

S. Chervenkov, Dragomir Neshev, G. Paulus, Aleksander Dreischuh, Herbert Walther

Proceedings Volume 4397, (2001) https://doi.org/10.1117/12.425130

KEYWORDS: Spiral phase plates, Solitons, Energy efficiency, Optical vortices, Refractive index, Nonlinear optics, Beam splitters, Beam propagation method, Numerical simulations, Channel projecting optics

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Proceedings Article | 9 April 2001 Paper

Paper

Nonlinear interaction of ring dark solitary waves with coaxial dark beams

Aleksander Dreischuh, Dragomir Neshev, S. Chervenkov, G. Paulus, F. Grasbon, Herbert Walther

Proceedings Volume 4397, (2001) https://doi.org/10.1117/12.425131

KEYWORDS: Spiral phase plates, Computer generated holography, Switches, Diffraction, Numerical simulations, Solids, Optical vortices, Nonlinear optics, Beam analyzers, Holograms

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Proceedings Article | 7 May 1999 Paper

Paper

Femtosecond interferometric autocorrelations in the presence of pulse-front distortions

F. Grasbon, Aleksander Dreischuh, G. Paulus, F. Zacher, Herbert Walther

Proceedings Volume 3571, (1999) https://doi.org/10.1117/12.347610

KEYWORDS: Interferometry, Femtosecond phenomena, Laser systems engineering, Signal detection, Mach-Zehnder interferometers, Mirrors, Laser development, Systems modeling, Computer simulations, Crystals

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Proceedings Article | 7 May 1999 Paper

Paper

Stability of one-dimensional dark spatial solitons of finite second transverse extent

Aleksander Dreischuh, T. Arabadjiev, Dragomir Neshev, G. Paulus, F. Zacher, Herbert Walther

Proceedings Volume 3571, (1999) https://doi.org/10.1117/12.347611

KEYWORDS: Spiral phase plates, Solitons, Spatial solitons, Technetium, Decision support systems, Modulation, Phase shift keying, Switching, Waveguides, Nonlinear optics

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Showing 5 of 20 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 7 May 2010

Solid State Lasers and Amplifiers IV, and High-Power Lasers

Conference Committee Involvement (2)

Advances in Ultrafast Condensed Phase Physics

23 April 2018 | Strasbourg, France

High-Power Lasers

15 April 2010 | Brussels, Belgium

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