Dr. Ronald Holzwarth Profile

Dr. Ronald Holzwarth

Co-Founder & CTO at Menlo Systems GmbH

SPIE Involvement:

Author

Publications (34)

Proceedings Article | 18 July 2024 Poster + Paper

Spectrum-flattened micro-resonator-based frequency comb for precision astronomical spectroscopy

Yuanjie Wu, Arne Kordts, Tilo Steinmetz, Karsten Winkler, Klaus Stockwald, Marc Fischer, Ronald Holzwarth

Proceedings Volume 13096, 13096AC (2024) https://doi.org/10.1117/12.3016936

KEYWORDS: Frequency combs, Supercontinuum generation, Spatial light modulators, Laser frequency, Laser stabilization, Spectrographs, Calibration, Astronomy, Photonic crystal fibers, Fiber lasers

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Proceedings Article | 20 June 2024 Presentation

High-power 2 μm GaSb-based VECSEL with an absolute wavelength stability below 1 MHz

Steffen Adler, Peter Holl, Elke Diwo-Emmer, Andreas Bächle, Maximilian Bradler, Milad Yahyapour, Ronald Holzwarth, Marcel Rattunde

Proceedings Volume PC13002, PC130020D (2024) https://doi.org/10.1117/12.3017558

KEYWORDS: Emission wavelengths, Vertical external cavity surface emitting lasers, Quantum frequencies, Laser stabilization, Quantum processes, Tunable lasers, Quantum wells, Quantum regime, Quantum beats, Laser optics

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Proceedings Article | 13 March 2024 Presentation

High-power, single-frequency 2-3 μm VECSEL

M. Rattunde, S. Adler, P. Holl, E. Diwo-Emmer, A. Bächle, M. Bradler, M. Yahyapour, R. Holzwarth

Proceedings Volume PC12868, PC1286806 (2024) https://doi.org/10.1117/12.3003684

KEYWORDS: Vertical external cavity surface emitting lasers, Emission wavelengths, Temperature metrology, Spectroscopy, Solid state lasers, Quantum systems, Quantum sensing, Quantum regime, Quantum operations, Nonlinear optical materials

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Proceedings Article | 12 July 2023 Open Access

Radiation tolerant frequency comb fiber laser for space applications

Matthias Lezius, Daniela Penka, Gilles Melin, Thierry Robin, Benoit Cadier, Jochen Kuhnhenn, Udo Weinand, Ronald Holzwarth

Proceedings Volume 12777, 127771Z (2023) https://doi.org/10.1117/12.2689947

KEYWORDS: Fiber lasers, Laser radiation, Laser irradiation, Oscillators, Frequency combs, Laser frequency, Laser stabilization, Astronomical imaging, Fiber optics, Erbium

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Proceedings Article | 9 March 2023 Presentation

Ultra-low noise laser systems for quantum sensing, computing, and precision metrology

Michele Giunta, Murtaza Ali Khan, Evgeny Savelyev, Manuel Brekenfeld, Ivanka Grguras, Dag Schmidt, Malcolm Simpson, Andreas Fricke, Maurice Lessing, Ronald Holzwarth, Marc Fischer, Thomas Lompe, Joschua Martinek

Proceedings Volume PC12447, PC124471J (2023) https://doi.org/10.1117/12.2650719

KEYWORDS: Sensing systems, Laser systems engineering, Computing systems, Quantum computing, Metrology, Laser metrology, Rubidium, Laser applications, Computer simulations, Chemical species

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Proceedings Article | 29 August 2022 Presentation + Paper

20 GHz astronomical laser frequency comb with super-broadband spectral coverage

Yuanjie Wu, Zinan Huang, Tilo Steinmetz, Mark Yeo, Klaus Stockwald, Ronald Holzwarth

Proceedings Volume 12184, 121841J (2022) https://doi.org/10.1117/12.2624078

KEYWORDS: Near infrared, Frequency combs, Astronomy, Spectrographs, Calibration

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Proceedings Article | 1 April 2022 Presentation

Compact DFG system for mid-IR generation with high power levels in the 3-5µm region

Christian Mauser, Carsten Cleff, Stefan Matern, Peter Adel, Jeonghyun Huh, Marc Fischer, Ronald Holzwarth

Proceedings Volume PC11985, PC1198504 (2022) https://doi.org/10.1117/12.2608491

KEYWORDS: Mid-IR, Spectroscopy, Laser systems engineering, Laser applications, Femtosecond phenomena, Tunable lasers, Time resolved spectroscopy, Time metrology, Nonlinear optics, Nonlinear frequency conversion

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Proceedings Article | 4 March 2022 Presentation + Paper

Radiation tolerant frequency comb fiber laser for space applications

Matthias Lezius, Daniela Penka, Gilles Melin, Thierry Robin, Benoit Cadier, Jochen Kuhnhenn, Udo Weinand, Ronald Holzwarth

Proceedings Volume 11997, 119970G (2022) https://doi.org/10.1117/12.2608285

KEYWORDS: Fiber lasers, Oscillators, Amplifiers, Frequency combs, Absorption, Space operations, Manufacturing, Fiber amplifiers, Erbium, Power meters

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Proceedings Article | 5 March 2021 Presentation

Comb-assisted ultrastable laser system for quantum technologies

Michele Giunta, Martin Wolferstetter, Nikolai Lilienfein, Simon Holzberger, Sarah Saint-Jalm, Maurice Lessing, Marc Fischer, Ronald Holzwarth

Proceedings Volume 11700, 1170037 (2021) https://doi.org/10.1117/12.2582549

KEYWORDS: Quantum computing, Laser systems engineering, Chemical species, Laser stabilization, Computing systems, Strontium, Laser applications, Control systems, Clocks, Sensors

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Proceedings Article | 5 March 2021 Presentation

Mid-IR generation in a compact high repetition rate DFG system based on an Yb-fiber laser

Carsten Cleff, Stefan Matern, Peter Adel, Marc Fischer, Ronald Holzwarth

Proceedings Volume 11670, 1167006 (2021) https://doi.org/10.1117/12.2578624

KEYWORDS: Mid-IR, Spectroscopy, Laser systems engineering, Infrared microscopy, Signal generators, Nonlinear frequency conversion, Nonlinear crystals, Laser crystals, Laser applications, Femtosecond phenomena

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Proceedings Article | 30 March 2020 Presentation + Paper

Compact, high-speed sampling engine for pulsed femtosecond lasers

Milan Oeri, Ole Peters, Martin Wolferstetter, Ronald Holzwarth

Proceedings Volume 11348, 1134808 (2020) https://doi.org/10.1117/12.2558423

KEYWORDS: Ultrafast phenomena, Picosecond phenomena, Modulation, Spectroscopy, Terahertz spectroscopy, Actuators, Oscillators, Mode locking

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Proceedings Article | 10 March 2020 Presentation

Ultrafast repetition rate control for pulsed femtosecond lasers (Conference Presentation)

Ole Peters, Sami Wittmann, Ronald Holzwarth

Proceedings Volume 11279, 112790N (2020) https://doi.org/10.1117/12.2543678

KEYWORDS: Femtosecond phenomena, Ultrafast phenomena, Laser systems engineering, Imaging spectroscopy, Measurement devices, Botany, Semiconductors, Nondestructive evaluation, Control systems, Electro optics

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Proceedings Article | 7 March 2019 Paper

High power frequency comb delivered by a Tm-doped fiber laser

Evgeny Shestaev, Christian Gaida, Tobias Heuermann, Martin Gebhardt, Thomas Butler, Daniel Gerz, Nikolai Lilienfein, Phillipp Sulzer, Marc Fischer, Ronald Holzwarth, Alfred Leitenstorfer, Ioachim Pupeza, Jens Limpert

Proceedings Volume 10897, 108970I (2019) https://doi.org/10.1117/12.2510529

KEYWORDS: Frequency combs, Interferometers, Fiber lasers, Mid-IR, Laser systems engineering, Feedback signals, Fluctuations and noise

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Proceedings Article | 16 February 2018 Presentation + Paper

Ultra-low noise microwave signal generation with an optical frequency comb

Xiaopeng Xie, Romain Bouchand, Daniele Nicolodi, Michele Giunta, Wolfgang Hänsel, Matthias Lezius, Abhay Joshi, Shubhashish Datta, Christophe Alexandre, Michel Lours, Pierre-Alain Tremblin, Giorgio Santarelli, Ronald Holzwarth, Yann Le Coq

Proceedings Volume 10518, 105180N (2018) https://doi.org/10.1117/12.2286316

KEYWORDS: Microwave radiation, Interference (communication), Frequency combs, Photodiodes, Signal generators, Optical amplifiers, Microwave photonics, Oscillators, Photonic microstructures, Mode locking

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Proceedings Article | 22 February 2017 Presentation + Paper

Hidden amplitude-phase correlations in the carrier-envelope noise of mode-locked lasers

Nils Raabe, Tianli Feng, Mark Mero, Haochen Tian, Youjian Song, Wolfgang Hänsel, Ronald Holzwarth, Alexander Sell, Armin Zach, Günter Steinmeyer

Proceedings Volume 10089, 1008907 (2017) https://doi.org/10.1117/12.2255608

KEYWORDS: Mode locking, Laser optics, Modulation, Pulsed laser operation, Femtosecond phenomena, Sapphire lasers, Frequency modulation, Fiber lasers, Laser stabilization, Mirrors, Absorption, Laser metrology

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Proceedings Article | 9 August 2016 Paper

Relative stability of two laser frequency combs for routine operation on HARPS and FOCES

Rafael Probst, Gaspare Lo Curto, Gerardo Ávila, Anna Brucalassi, Bruno Canto Martins, Izan de Castro Leão, Massimiliano Esposito, Jonay González Hernández, Frank Grupp, Theodor Hänsch, Ronald Holzwarth, Hanna Kellermann, Florian Kerber, Olaf Mandel, Antonio Manescau , Luca Pasquini, Eszter Pozna, Rafael Rebolo, José Renan de Medeiros, Sebastian Stark, Tilo Steinmetz, Alejandro Suárez Mascareño, Thomas Udem, Josefina Urrutia, Yuanjie Wu

Proceedings Volume 9908, 990864 (2016) https://doi.org/10.1117/12.2231434

KEYWORDS: Spectrographs, Calibration, Frequency combs, Astronomy, Observatories, Multimode fibers, Telescopes, Lanthanum, Lamps, Precision calibration

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Proceedings Article | 8 July 2014 Paper

A laser frequency comb featuring sub-cm/s precision for routine operation on HARPS

Rafael Probst, Gaspare Lo Curto, Gerardo Avila, Bruno Canto Martins, José de Medeiros, Massimiliano Esposito, Jonay González Hernández, Theodor Hänsch, Ronald Holzwarth, Florian Kerber, Izan Leão, Antonio Manescau, Luca Pasquini, Rafael Rebolo-López, Tilo Steinmetz, Thomas Udem, Yuanjie Wu

Proceedings Volume 9147, 91471C (2014) https://doi.org/10.1117/12.2055784

KEYWORDS: Spectrographs, Continuous wave operation, Calibration, Optical filters, Frequency combs, Linear filtering, Astronomy, Fiber lasers, Charge-coupled devices, Fiber amplifiers

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Proceedings Article | 26 September 2013 Paper

Spectral flattening of supercontinua with a spatial light modulator

R. Probst, T. Steinmetz, T. Wilken, G. K. Wong, H. Hundertmark, S. Stark, P. St. J. Russell, T. Hänsch, R. Holzwarth, Th. Udem

Proceedings Volume 8864, 88641Z (2013) https://doi.org/10.1117/12.2036601

KEYWORDS: Calibration, Spatial light modulators, Modulation, Astronomy, Spectrographs, Frequency combs, Liquid crystals, Electrodes, Polarizers, Spectral calibration

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Proceedings Article | 22 February 2013 Paper

Terabit/s data transmission using optical frequency combs

C. Koos, J. Leuthold, W. Freude, T. Kippenberg, J. Pfeifle, C. Weimann, K. Hartinger, V. Brasch, T. Herr, R. Holzwarth, D. Hillerkuss, R. Schmogrow

Proceedings Volume 8600, 860009 (2013) https://doi.org/10.1117/12.2003701

KEYWORDS: Frequency combs, Data transmission, Modulation, Wavelength division multiplexing, Transmitters, Microresonators, Polarization, Receivers, Silicon, Mode locking

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Proceedings Article | 24 September 2012 Paper

Achieving a few cm/sec calibration repeatability for high resolution spectrographs: the laser frequency comb on HARPS

Gaspare Lo Curto, Antonio Manescau, Gerardo Avila, Luca Pasquini, Tobias Wilken, Tilo Steinmetz, Ronald Holzwarth, Rafael Probst, Thomas Udem, Theodor Hänsch, Jonay González Hernández, Massimiliano Esposito, Rafael Rebolo, Bruno Canto Martins, Jose Renan de Medeiros

Proceedings Volume 8446, 84461W (2012) https://doi.org/10.1117/12.925964

KEYWORDS: Calibration, Spectrographs, Frequency combs, Stars, Telescopes, Planets, Lamps, Astronomy, Prototyping, High power fiber amplifiers

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Proceedings Article | 24 September 2012 Paper

A testbed for simultaneous measurement of fiber near and far-field for the evaluation of fiber scrambling properties

Tobias Feger, Anna Brucalassi, Frank Grupp, Florian Lang-Bardl, Ronald Holzwarth, Ulrich Hopp, Ralf Bender

Proceedings Volume 8446, 844692 (2012) https://doi.org/10.1117/12.925624

KEYWORDS: Optical fibers, Cladding, Telescopes, Light emitting diodes, Spectrographs, Visible radiation, CCD cameras, Light, Observatories, Doppler effect

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Proceedings Article | 13 September 2012 Paper

Performance of a laser frequency comb calibration system with a high-resolution solar echelle spectrograph

H.-P. Doerr, T. Kentischer, T. Steinmetz, R. Probst, M. Franz, R. Holzwarth, Th. Udem, T. W. Hänsch, W. Schmidt

Proceedings Volume 8450, 84501G (2012) https://doi.org/10.1117/12.926224

KEYWORDS: Calibration, Spectrographs, Frequency combs, Telescopes, Charge-coupled devices, Spectral calibration, Cameras, Space telescopes, Point spread functions, Spectral resolution

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Proceedings Article | 5 May 2012 Paper

Multilevel optical sectioning based on digital holography with a femtosecond frequency comb laser

Klaus Körner, Giancarlo Pedrini, Igor Alexeenko, Wolfram Lyda, Tilo Steinmetz, Ronald Holzwarth, Wolfgang Osten

Proceedings Volume 8430, 843004 (2012) https://doi.org/10.1117/12.923563

KEYWORDS: Digital holography, Holograms, Frequency combs, Mirrors, Holography, Sensors, Femtosecond phenomena, Temporal coherence, Femtosecond frequency combs, Spherical lenses

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Proceedings Article | 15 September 2011 Paper

Pressure and temperature stabilization of an existing chelle spectrograph II

Frank Grupp, Anna Brucalassi, Florian Lang, Shao Ming Hu, Ronald Holzwarth, Thomas Udem, Ulrich Hopp, Ralf Bender

Proceedings Volume 8151, 815119 (2011) https://doi.org/10.1117/12.893610

KEYWORDS: Spectrographs, Observatories, Telescopes, Planets, 3D modeling, Spectroscopes, Glasses, Zemax, Photovoltaics, Quantum optics

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Proceedings Article | 21 July 2010 Paper

Pressure and temperature stabilization of an existing Echelle spectrograph

Frank Grupp, Thomas Udem, Ronald Holzwarth, Florian Lang-Bardl, Ulrich Hopp, Shao-Ming Hu, Anna Brucalassi, Wang Liang, Ralf Bender

Proceedings Volume 7735, 773573 (2010) https://doi.org/10.1117/12.856653

KEYWORDS: Spectrographs, Observatories, Telescopes, Planets, Space telescopes, Fiber couplers, Calibration, Spectroscopes, Temperature metrology, Stars

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Proceedings Article | 15 July 2010 Paper

High-precision calibration of spectrographs using laser frequency combs

Tobias Wilken, Christophe Lovis, Antonio Manescau, Tilo Steinmetz, Luca Pasquini, Gaspare Lo Curto, Theodor Hänsch, Ronald Holzwarth, Thomas Udem

Proceedings Volume 7735, 77350T (2010) https://doi.org/10.1117/12.857248

KEYWORDS: Calibration, Spectrographs, Charge-coupled devices, Frequency combs, Spectral calibration, Astronomy, Telescopes, Optical filters, Lamps, Multimode fibers

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Proceedings Article | 15 July 2010 Paper

Along the path towards extremely precise radial velocity measurements

Gaspare Lo Curto, Christophe Lovis, Tobias Wilken, Gerardo Avila, Bruno Chazelas, Massimiliano Esposito, Theodor Hänsch, Jonay Gonzáez-Hernández, Ronald Holzwarth, Gerardo Ihle, Antonio Manescau, Luca Pasquini, Francesco Pepe, Rafael Rebolo, Alex Segovia, Peter Sinclaire, Tilo Steinmetz, Thomas Udem, François Wildi

Proceedings Volume 7735, 77350Z (2010) https://doi.org/10.1117/12.857232

KEYWORDS: Calibration, Spectrographs, Telescopes, Stars, Planets, Velocity measurements, Frequency combs, Lamps, Lanthanum, Sensors

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Proceedings Article | 17 September 2009 Paper

Handheld terahertz spectrometer for the detection of liquid explosives

N. Krumbholz, C. Jansen, M. Scheller, T. Müller-Wirts, S. Lübbecke, R. Holzwarth, R. Scheunemann, R. Wilk, B. Sartorius, H. Roehle, D. Stanze, J. Beckmann, L. von Chrzanowski, U. Ewert, M. Koch

Proceedings Volume 7485, 748504 (2009) https://doi.org/10.1117/12.830381

KEYWORDS: Antennas, Liquids, Spectroscopy, Terahertz radiation, Refractive index, Fiber lasers, Dispersion, Explosives, Indium gallium arsenide, Water

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Proceedings Article | 20 August 2009 Paper

Calibration of high accuracy radial velocity spectrographs: beyond the Th-Ar lamps

Francois Wildi, Francesco Pepe, Christophe Lovis, Bruno Chazelas, Tobias Wilken, Antonio Manescau, Luca Pasquini, Ronald Holzwarth, Tilo Stenimetz, Thomas Udem, Theodor Hänsch, Gaspare Lo Curto

Proceedings Volume 7440, 74400M (2009) https://doi.org/10.1117/12.826498

KEYWORDS: Calibration, Spectrographs, Fabry–Perot interferometers, Optical fibers, Lamps, Frequency combs, Zerodur, Observatories, Telescopes, Fabry–Perot interferometry

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Proceedings Article | 26 January 2009 Paper

A chip-scale microwave repetition rate frequency comb

P. Del'Haye, O. Arcizet, A. Schliesser, R. Holzwarth, T. Kippenberg

Proceedings Volume 7222, 722209 (2009) https://doi.org/10.1117/12.814912

KEYWORDS: Frequency combs, Dispersion, Optical microcavities, Microresonators, Microwave radiation, Four wave mixing, Resonators, Silica, Fiber lasers, Photodiodes

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Proceedings Article | 13 February 2008 Paper

Spectral slicing of femtosecond pulses using semiconductor modulator arrays

Dan Yanson, Stewart McDougall, Ian Baker, John Marsh, Andreas Sizmann, Ronald Holzwarth, Michael Jost, Iain McKenzie, Michael Strain

Proceedings Volume 6877, 68770M (2008) https://doi.org/10.1117/12.761812

KEYWORDS: Modulators, Modulation, Femtosecond phenomena, Diffraction gratings, Semiconductors, Telecommunications, Waveguides, Absorption, Diffraction, Quantum wells

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SPIE Journal Paper | 1 July 2004 Open Access

Imaging ex vivo and in vitro brain morphology in animal models with ultrahigh resolution optical coherence tomography

Kostadinka Bizheva, Angelika Unterhuber, Boris Hermann, Boris Považay, Harald Sattmann, Wolfgang Drexler, Andreas Stingl, Tuan Le, Michael Mei, Ronald Holzwarth, Herbert Reitsammer, John Morgan, Alan Cowey

JBO, Vol. 9, Issue 04, (July 2004) https://doi.org/10.1117/12.10.1117/1.1756920

KEYWORDS: Optical coherence tomography, Brain, Neuroimaging, Tissue optics, Image resolution, Tissues, Visualization, Neurons, Light sources, Fiber lasers

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Proceedings Article | 2 October 2003 Paper

Ultrahigh-resolution optical coherence tomography in the visible and 1300-nm wavelength region

Boris Povazay, Kostadinka Bizheva, Angelika Unterhuber, Boris Hermann, Harald Sattmann, William Wadsworth, Jonathan Knight, Philip Russell, Michael Mei, Ronald Holzwarth, Thomas Hoelzenbein, Adolf Fercher, Wolfgang Drexler

Proceedings Volume 5140, (2003) https://doi.org/10.1117/12.500945

KEYWORDS: Optical coherence tomography, Light sources, Tissues, Biopsy, Image resolution, Femtosecond phenomena, Imaging systems, Scattering, Erbium lasers, Fiber lasers

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Proceedings Article | 2 October 2003 Paper

Imaging brain morphology with ultrahigh-resolution optical coherence tomography

Kostadinka Bizheva, Angelika Unterhuber, Boris Hermann, Boris Povazay, Harald Sattmann, Michael Mei, Ronald Holzwarth, Matthias Preusser, Herbert Reitsamer, Michael Seefeldt, Ralf Menzel, Herbert Budka, Adolf Fercher, Wolfgang Drexler

Proceedings Volume 5140, (2003) https://doi.org/10.1117/12.501164

KEYWORDS: Optical coherence tomography, Brain, Neuroimaging, Tissue optics, Light sources, Tissues, Visualization, Image resolution, Fiber lasers, In vitro testing

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Showing 5 of 34 publications

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