Dr. Rüdiger Grunwald Profile

Dr. Rüdiger Grunwald

Guest Scientist at MBI für Nichtlineare Optik und Kurzzeitspektroskopie

SPIE Involvement:

Author

Publications (42)

Proceedings Article | 15 March 2023 Presentation + Paper

Structuring light by combining spatial modulation and fast angular shaping

R. Grunwald, M. Jurke, M. Bock, M. Liebmann, B. Bruno, H. Gowda, U. Wallrabe

Proceedings Volume 12436, 1243606 (2023) https://doi.org/10.1117/12.2648368

KEYWORDS: Microelectromechanical systems, Spatial light modulators, Mirrors, Diffraction, Spiral phase plates, Reflection, Lens arrays, Beam shaping

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Proceedings Article | 5 March 2021 Presentation + Paper

Tailored spectral rotation of vortex pulses by non-uniform spiral phase gratings

M. Liebmann, A. Treffer, M. Bock, M. Jurke, U. Wallrabe, R. Grunwald

Proceedings Volume 11701, 117010V (2021) https://doi.org/10.1117/12.2578503

KEYWORDS: Phase shift keying, Ultrafast phenomena, Spatial light modulators, Modulation, Spectroscopy, Reflectivity, Phase shifts, Optical spectroscopy, Optical communications, Nondiffracting beams

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Proceedings Article | 24 February 2020 Paper

Controlling the spectral rotation of ultrashort vortex pulses

M. Liebmann, A. Treffer, M. Bock, U. Wallrabe, R. Grunwald

Proceedings Volume 11297, 112970W (2020) https://doi.org/10.1117/12.2543055

KEYWORDS: Spatial light modulators, Diffractive optical elements, Spiral phase plates, Beam shaping, Spectroscopy, Statistical analysis

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Proceedings Article | 1 March 2019 Paper

Spectral self-imaging and Gouy rotation echos of propagating vortex pulse arrays

M. Liebmann, A. Treffer, M. Bock, T. Seiler, J. Jahns, T. Elsässer, R. Grunwald

Proceedings Volume 10935, 109350T (2019) https://doi.org/10.1117/12.2507934

KEYWORDS: Wavefronts, Wave propagation, Spectroscopy, Destructive interference, Diffraction, Femtosecond phenomena

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Proceedings Article | 22 February 2018 Paper

Spectral anomaly of ultrashort vortex pulses with axially oscillating twist

M. Liebmann, A. Treffer, M. Bock, T. Seiler, T. Elsässer, R. Grunwald

Proceedings Volume 10549, 105490F (2018) https://doi.org/10.1117/12.2287369

KEYWORDS: Spiral phase plates, Femtosecond phenomena, Ultrafast phenomena, Wave propagation, Spectroscopy, Singular optics, Statistical analysis

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Proceedings Article | 27 February 2017 Paper

Array-specific propagation of flexibly structured ultrashort pulses

A. Treffer, M. Bock, U. Wallrabe, R. Grunwald

Proceedings Volume 10120, 101200S (2017) https://doi.org/10.1117/12.2250520

KEYWORDS: Bessel beams, Microelectromechanical systems, Superposition, Nondiffracting beams, Beam propagation method, Optical simulations, Beam shaping, Axicons, Reflectivity, Sapphire lasers

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Proceedings Article | 4 March 2016 Paper

Mapping the spectral twist of few-cycle vortex pulses

M. Bock, R. Grunwald

Proceedings Volume 9764, 97640O (2016) https://doi.org/10.1117/12.2208023

KEYWORDS: Associative arrays, Wavefront sensors, Data processing, Laser-matter interactions, Interferometry, Computer programming, Spiral phase plates, Dispersion, Axicons, Statistical analysis, Gaussian beams

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Proceedings Article | 10 March 2015 Paper

Adaptive self-reconstruction and autocorrelation of nondiffracting wavepackets

A. Treffer, M. Bock, S. König, J. Brunne, U. Wallrabe, R. Grunwald

Proceedings Volume 9379, 937903 (2015) https://doi.org/10.1117/12.2076283

KEYWORDS: Microelectromechanical systems, Mirrors, Second-harmonic generation, Phase shifts, Ultrafast phenomena, Nondiffracting beams, Axicons, Crystals, Reflectivity, Spatial frequencies

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Proceedings Article | 7 March 2014 Paper

Femtosecond laser induced nanostructuring for surface enhanced Raman spectroscopy

H. Messaoudi, S. Das, J. Lange, F. Heinrich, S. Schrader, M. Frohme, R. Grunwald

Proceedings Volume 8972, 89720H (2014) https://doi.org/10.1117/12.2037052

KEYWORDS: Surface enhanced Raman spectroscopy, Silver, Metals, Nanostructures, Raman spectroscopy, Signal detection, Nanostructuring, Second-harmonic generation, Silicon, Proteins

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Proceedings Article | 25 February 2014 Paper

Few-cycle vortex wavepackets with tunable topological charge

R. Grunwald, M. Bock, J. Brunne, U. Wallrabe

Proceedings Volume 8999, 89990W (2014) https://doi.org/10.1117/12.2060877

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Proceedings Article | 25 February 2014 Paper

Propagation and wavefront ambiguity of linear nondiffracting beams

R. Grunwald, M. Bock

Proceedings Volume 8999, 89990G (2014) https://doi.org/10.1117/12.2037045

KEYWORDS: Wave propagation, Wavefronts, Beam propagation method, Light wave propagation, Nondiffracting beams, Sensors, Bessel beams, Axicons, Geometrical optics, Diffraction

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Proceedings Article | 18 March 2013 Paper

Photochemical activity of TiO2 nanotubes

A. Pfuch, F. Güell, T. Toelke, S. Das, H. Messaoudi, E. McGlynn, W. Seeber, C. Fábrega, T. Andreu, J. Morante, R. Grunwald

Proceedings Volume 8626, 86260S (2013) https://doi.org/10.1117/12.2000554

KEYWORDS: Principal component analysis, Raman spectroscopy, Titanium, Scanning electron microscopy, Spectroscopy, Nanostructures, Crystals, Absorption, Photocatalysis, Titanium dioxide

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Proceedings Article | 15 March 2013 Paper

Temporal self-reconstruction of few-cycle nondiffracting wavepackets

S. König, M. Bock, S. Das, A. Treffer, R. Grunwald

Proceedings Volume 8611, 86110S (2013) https://doi.org/10.1117/12.2000639

KEYWORDS: Optical filters, Axicons, Oscillators, Beam shaping, Sensors, Optical design, Computer programming, Wavefront sensors, Wavefronts, Ultrafast phenomena

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Proceedings Article | 5 March 2013 Paper

MEMS axicons for nondiffracting line shaping of ultrashort pulses

A. Treffer, S. Das, M. Bock, J. Brunne, U. Wallrabe, R. Grunwald

Proceedings Volume 8637, 86370M (2013) https://doi.org/10.1117/12.2000544

KEYWORDS: Axicons, Microelectromechanical systems, Mirrors, Femtosecond phenomena, Nondiffracting beams, Silicon, Oscillators, Ultrafast phenomena, Reflectivity, Beam shaping

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Proceedings Article | 17 February 2011 Paper

Adaptive shaping of complex pulsed nondiffracting light fields

M. Bock, S. Das, R. Grunwald

Proceedings Volume 7950, 795009 (2011) https://doi.org/10.1117/12.870855

KEYWORDS: Axicons, Wavefront sensors, Spatial light modulators, Bessel beams, Nondiffracting beams, Ultrafast phenomena, Reflectivity, Computer programming, Beam shaping, Adaptive optics

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Proceedings Article | 11 February 2011 Paper

Scattering-controlled femtosecond-laser induced nanostructuring of TiO2 thin films

S. Das, A. Rosenfeld, M. Bock, A. Pfuch, W. Seeber, R. Grunwald

Proceedings Volume 7925, 79251B (2011) https://doi.org/10.1117/12.874519

KEYWORDS: Thin films, Scattering, Laser scattering, Scanning electron microscopy, Surface finishing, Nanostructuring, Crystals, Nanostructures, Femtosecond phenomena, Titanium dioxide

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Proceedings Article | 13 May 2010 Paper

Programmable microoptics for ultrashort pulses

Ruediger Grunwald, Martin Bock

Proceedings Volume 7716, 77160P (2010) https://doi.org/10.1117/12.856370

KEYWORDS: Ultrafast phenomena, Micro optics, LCDs, Axicons, Distortion, Reflectivity, Femtosecond phenomena, Bessel beams, Wave propagation, Light wave propagation

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Proceedings Article | 26 February 2010 Paper

Generation of extended-area femtosecond laser induced periodic nanostructures on TiO2 by moving samples through a line focus

K. Dasari, S. Das, A. Rosenfeld, R. Grunwald

Proceedings Volume 7586, 75860K (2010) https://doi.org/10.1117/12.840493

KEYWORDS: Nanostructures, Femtosecond phenomena, Scanning electron microscopy, Pulsed laser operation, Second-harmonic generation, Spatial frequencies, Solar energy, Sapphire lasers, Photovoltaics, Titanium dioxide

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Proceedings Article | 18 February 2010 Paper

Spatial control and diagnostics of femtosecond pulses with programmable microoptics

Ruediger Grunwald, Martin Bock

Proceedings Volume 7579, 75790T (2010) https://doi.org/10.1117/12.840369

KEYWORDS: Femtosecond phenomena, Spatial light modulators, Computer programming, Ultrafast phenomena, Beam shaping, Micro optics, Oscillators, Diffraction, Liquid crystals, Diagnostics

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Proceedings Article | 8 February 2010 Paper

Orbital angular momentum experiments with broadband few cycle pulses

Asmus Richter, Martin Bock, Juergen Jahns, Ruediger Grunwald

Proceedings Volume 7613, 761308 (2010) https://doi.org/10.1117/12.840907

KEYWORDS: Spiral phase plates, Optical vortices, Femtosecond phenomena, Dispersion, Axicons, Spectroscopy, Oscillators, Mode locking, Diffraction gratings

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Proceedings Article | 17 June 2009 Paper

Adaptive Bessel-autocorrelation of ultrashort pulses with phase-only spatial light modulators

Silke Huferath-von Luepke, Martin Bock, Ruediger Grunwald

Proceedings Volume 7390, 73900B (2009) https://doi.org/10.1117/12.827026

KEYWORDS: Phase shift keying, Axicons, Ultrafast phenomena, Fringe analysis, Phase shifts, Spatial resolution, Spatial light modulators, Computer programming, Second-harmonic generation, Data processing

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Proceedings Article | 20 May 2009 Paper

Time-resolved two-wavelength contouring of adaptive fluidic PDMS-lenses

Thomas Hansel, Ruediger Grunwald, Günter Steinmeyer, Uwe Griebner, Florian Schneider, Ulrike Wallrabe

Proceedings Volume 7358, 735809 (2009) https://doi.org/10.1117/12.820698

KEYWORDS: Digital holography, Holograms, Holography, Cameras, Actuators, Polarization, Fluid dynamics, Holographic interferometry, Beam splitters, Laser sources

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We present a synthesized sub-ps dual-wavelength laser source for digital holographic interferometry with a wide reconstruction range. The developed laser source generates two spectrally separated parts within one pulse. The sub-ps pulse duration desensitizes the holographic setup to environmental impacts. A center wavelength distance of only 12 nm with a high contrast was demonstrated by spectral shaping of the 50 nm broad seed spectrum of a CPA Ti:sapphire laser system centered at 800 nm. Time-resolved two-wavelength contouring requires the simultaneous and separable recording of two holograms. In general, a single CCD-camera is applied, and the spectral separation is realized by different reference wave tilts, which requires ambitious interferometric setups. Contrary to this, we introduce two CCD-cameras for digital holographic recording, thus essentially simplifying the interferometric setup by the need of only one propagation direction of the reference wave. To separate the holograms for the simultaneous recording process, a Mach-Zehnder interferometer was extended by a polarization encoding sequence. To study our approach of time-resolved digital holographic two-wavelength contouring, an adaptive fluidic PDMS-lens with integrated piezoelectric actuator served as test object. The PDMS-lens consists of an oil-filled lens chamber and a pump actuator. If a voltage is applied to the piezoelectric bending actuator the fluid is pumped into the lens chamber which causes a curvature change of the 60-μm thick lens membrane and thus a shift of the focal length. The dynamic behavior of the PDMS-lens, driven at a frequency of 1 Hz, was investigated at a frame rate of 410 frames per second. The measured temporal change of the lens focal length between 98 and 44 mm followed the modulation of the piezoelectric voltage with a 30 V peak-to-peak amplitude. Due to the performed time-resolved two wavelength contouring, we are able to extract the optical path length differences between center and perimeter of the lens. From the calculated phase difference maps we estimated large optical path differences of larger than 10 μm, corresponding to more than 15 times of the source wavelength.

Proceedings Article | 11 September 2008 Open Access

Smart spatio-temporal beam shaping with thin-film micro-optics

Ruediger Grunwald, Martin Bock, Silke Huferath-von Luepke

Proceedings Volume 7062, 706202 (2008) https://doi.org/10.1117/12.792992

KEYWORDS: Thin films, Micro optics, Reflectivity, Beam shaping, Dielectrics, Liquid crystals, Ultrafast phenomena, Diagnostics, Axicons, Spatial light modulators

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Proceedings Article | 11 August 2008 Paper

Noncollinear autocorrelation with radially symmetric nondiffracting beams

Silke Huferath-von Luepke, Volker Kebbel, Martin Bock, Susanta Kumar Das, Ruediger Grunwald

Proceedings Volume 7063, 706311 (2008) https://doi.org/10.1117/12.792731

KEYWORDS: Axicons, Reflectivity, Interferometry, Signal detection, Bessel beams, Second-harmonic generation, Wavefronts, Sapphire lasers, Ultrafast phenomena, Beam shaping

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Proceedings Article | 18 June 2007 Paper

Robust Shack-Hartmann wavefront sensing with ultraflat microaxicons

R. Grunwald, M. Bock, S. Huferath

Proceedings Volume 6617, 66170O (2007) https://doi.org/10.1117/12.726081

KEYWORDS: Axicons, Wavefront sensors, Wavefronts, Thin films, Beam shaping, Reflectivity, Statistical analysis, Tolerancing, Bessel beams, Sensors

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Proceedings Article | 8 June 2005 Paper

Recent advances in thin-film microoptics

R. Grunwald, U. Neumann, U. Griebner, G. Stibenz, S. Langer, G. Steinmeyer, V. Kebbel, M. Piche

Proceedings Volume 5827, (2005) https://doi.org/10.1117/12.604866

KEYWORDS: Thin films, Micro optics, Chemical elements, Axicons, Dielectrics, Reflectivity, Wavefront sensors, Beam shaping, Vacuum ultraviolet, Wavefronts

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Proceedings Article | 16 November 2004 Paper

Truncated ultrashort-pulse small-angle Bessel beams

Ruediger Grunwald, Uwe Neumann, Gero Stibenz, Stefan Langer, Günter Steinmeyer, Volker Kebbel, Jean-Luc Néron, Michel Piché

Proceedings Volume 5579, (2004) https://doi.org/10.1117/12.567390

KEYWORDS: Bessel beams, Axicons, Gaussian beams, Laser beam propagation, Reflectivity, Beam propagation method, Beam shaping, Nondiffracting beams, Oscillators, Optical simulations

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SPIE Journal Paper | 1 November 2004

Ultrafast spatiotemporal processing with thin-film micro-optics

Ruediger Grunwald, Volker Kebbel, Uwe Neumann, Uwe Griebner, Michel Piché

OE, Vol. 43, Issue 11, (November 2004) https://doi.org/10.1117/12.10.1117/1.1801432

KEYWORDS: Ultrafast phenomena, Thin films, Diffraction, Beam shaping, Wavefront sensors, Sensors, Second-harmonic generation, Sapphire lasers, Micro optics, Wave propagation

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Proceedings Article | 1 June 2004 Paper

Wavefront autocorrelation of femtosecond laser beams

Ruediger Grunwald, Uwe Neumann, Uwe Griebner, Klaus Reimann, Guenter Steinmeyer, Volker Kebbel

Proceedings Volume 5333, (2004) https://doi.org/10.1117/12.526722

KEYWORDS: Wavefronts, Wavefront sensors, Sensors, Beam splitters, Thin films, Femtosecond phenomena, Axicons, Silica, CCD cameras, Neodymium

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Proceedings Article | 1 June 2004 Paper

Spatio-temporal control of laser beams with thin film shapers

Ruediger Grunwald, Uwe Neumann, Uwe Griebner, Volker Kebbel, Hans-Joachim Kuehn

Proceedings Volume 5333, (2004) https://doi.org/10.1117/12.526661

KEYWORDS: Thin films, Semiconductor lasers, Reflectivity, Micro optics, Collimation, Nondiffracting beams, Beam shaping, Vacuum ultraviolet, Axicons, Microlens array

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Proceedings Article | 10 November 2003 Paper

Spatio-temporal processing of femtosecond laser pulses with thin film micro-optics

Ruediger Grunwald, Volker Kebbel, Uwe Neumann, Uwe Griebner, Michel Piche

Proceedings Volume 5181, (2003) https://doi.org/10.1117/12.508044

KEYWORDS: Thin films, Diffraction, Ultrafast phenomena, Beam shaping, Wavefront sensors, Femtosecond phenomena, Sensors, Wavefronts, Wave propagation, Sapphire lasers

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Proceedings Article | 12 September 2003 Paper

Second harmonic characteristics of photonic composite glass layers with ZnO nanocrystallites for ultrafast applications

Uwe Neumann, Ruediger Grunwald, Uwe Griebner, Guenter Steinmeyer, Michael Woerner, Wolfgang Seeber

Proceedings Volume 4972, (2003) https://doi.org/10.1117/12.478546

KEYWORDS: Zinc oxide, Second-harmonic generation, Thin films, Crystals, Glasses, Scanning electron microscopy, Ultrafast phenomena, Polarization, Photonic glasses, Composites

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Proceedings Article | 17 February 2003 Paper

Femtosecond laser beam shaping with structured thin-film elements

Ruediger Grunwald, Volker Kebbel, Uwe Griebner, Uwe Neumann, Andreas Kummrow, Erik Nibbering, M Rini, Michel Piche, Guy Rousseau, Michelle Fortin

Proceedings Volume 4833, (2003) https://doi.org/10.1117/12.473829

KEYWORDS: Axicons, Thin films, Beam shaping, Mirrors, Femtosecond phenomena, Sapphire lasers, Optical simulations, Reflectivity, Wavefronts, Bessel beams

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Proceedings Article | 17 February 2003 Paper

Spatially resolved measurement of slow-axis pseudo near field of diode laser arrays

G. Seewald, Ruediger Grunwald

Proceedings Volume 4833, (2003) https://doi.org/10.1117/12.474836

KEYWORDS: Semiconductor lasers, Near field, Diodes, Spatial resolution, Signal detection, Metals, Polarization, Gold, Laser beam propagation, Interferometers

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Proceedings Article | 16 April 2002 Paper

Microreflectance inspection of diode laser front facets

Fabian Doerfel, Stefan Nerreter, Jens Tomm, Ruediger Grunwald, R. Kunkel, Johann Luft

Proceedings Volume 4648, (2002) https://doi.org/10.1117/12.462659

KEYWORDS: Waveguides, Semiconductor lasers, Reflectivity, Coating, Aluminum, Autoregressive models, Gallium, Refractive index, Semiconductors, Spatial resolution

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Proceedings Article | 10 December 2001 Paper

Automated high-accuracy measuring system for specular microreflectivity

Ruediger Grunwald, Stefan Nerreter, Jens Tomm, Sandy Schwirzke-Schaaf, Fabian Doerfel

Proceedings Volume 4449, (2001) https://doi.org/10.1117/12.450084

KEYWORDS: Reflectivity, Semiconductor lasers, Spatial resolution, Polarization, Sensors, Micromirrors, Micro optics, Refractive index, Microlens, GRIN lenses

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Proceedings Article | 13 November 2001 Paper

Design, characterization, and applications of multilayer micro-optics

Ruediger Grunwald, Stefan Nerreter, Uwe Griebner, Hans-Joachim Kuehn

Proceedings Volume 4437, (2001) https://doi.org/10.1117/12.448158

KEYWORDS: Reflectivity, Micro optics, Mirrors, Interferometry, Micromirrors, Microlens, Laser resonators, Interferometers, Semiconductor lasers, Beam shaping

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Proceedings Article | 15 September 1999 Paper

Generation of thin film micro-optics by crossed deposition through wire-grid masks

Uwe Griebner, Ruediger Grunwald

Proceedings Volume 3825, (1999) https://doi.org/10.1117/12.364294

KEYWORDS: Microlens, Microlens array, Thin films, Micro optics, Glasses, Vacuum deposition, Computer simulations, Deposition processes, Thin film deposition, Metals

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Proceedings Article | 24 May 1999 Paper

Short-pulse KrF laser with M2 reduction by a super-Gaussian mirror

Ruediger Grunwald, Hans Paetzold, Uwe Griebner

Proceedings Volume 3611, (1999) https://doi.org/10.1117/12.349271

KEYWORDS: Resonators, Mirrors, Reflectivity, Laser resonators, Excimer lasers, Beam propagation method, Confocal microscopy, Output couplers, Diffraction, Electrodes

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Proceedings Article | 12 May 1995 Paper

Microlens arrays for segmented laser architectures

Ruediger Grunwald, Uwe Griebner, Rudi Ehlert

Proceedings Volume 2383, (1995) https://doi.org/10.1117/12.209035

KEYWORDS: Microlens array, Semiconductor lasers, Optical fibers, Resonators, Laser resonators, Fiber lasers, Micromirrors, Microlens, Reflectivity, Solid state lasers

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Proceedings Article | 26 July 1993 Paper

Graded reflectivity micro-mirror arrays

R. Grunwald

Proceedings Volume 1983, 19830O (1993) https://doi.org/10.1117/12.2308443

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Proceedings Article | 1 October 1991 Paper

Apodized outcouplers for unstable resonators

Christel Budziuski, Ruediger Grunwald, Ingo Pinz, Dieter Schaefer, Horst Schoennagel

Proceedings Volume 1500, (1991) https://doi.org/10.1117/12.46838

KEYWORDS: Dielectrics, Mirrors, Resonators, Holography, Reflectivity, Dielectric mirrors, Phase conjugation, Diffraction gratings, Diffraction, Multilayers

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