Prof. Paul Allenspacher Profile

Prof. Paul Allenspacher

Chemical Engineer at Deutsches Zentrum für Luft- und Raumfahrt

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Author

Publications (30)

Proceedings Article | 11 June 2021 Open Access

Laser-induced damage and contamination testing for the next generation of LIDAR space optics

Nils Bartels, Paul Allenspacher, Thimotheus Alig, Istvan Balasa, Helmut Schröder, Gabriele Taube, Wolfgang Riede

Proceedings Volume 11852, 1185260 (2021) https://doi.org/10.1117/12.2600036

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Proceedings Article | 11 September 2020 Presentation

Damage precursor mitigation towards enhanced laser resistance of ultraviolet antireflective coatings

Thimotheus Alig, Heinrich Mädebach, Nils Bartels, Paul Allenspacher, Istvan Balasa, Tammo Böntgen, Detlev Ristau, Lars Jensen

Proceedings Volume 11514, 115140Z (2020) https://doi.org/10.1117/12.2571114

KEYWORDS: Ultraviolet radiation, Antireflective coatings, Resistance, Laser induced damage, Laser optics, Laser damage threshold, Particles, Adaptive optics, Deposition processes, Thin films

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Proceedings Article | 20 November 2019 Paper

Removal of laser-induced contamination on ALADIN laser optics by UV/ozone cleaning

Nils Bartels, Paul Allenspacher, Wolfgang Riede, Helmut Schröder, Denny Wernham

Proceedings Volume 11173, 111731C (2019) https://doi.org/10.1117/12.2535772

KEYWORDS: Contamination, Ozone, Luminescence, Ultraviolet radiation, Lamps, Mercury, Laser induced damage, Pulsed laser operation, Molecules, Oxygen

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Proceedings Article | 16 November 2018 Paper

Laser conditioning of UV anti-reflective optical coatings for applications in aerospace

Nils Bartels, Paul Allenspacher, Wolfgang Riede

Proceedings Volume 10805, 108051Q (2018) https://doi.org/10.1117/12.2326782

KEYWORDS: Laser induced damage, Laser optics, Optical coatings, Pulsed laser operation, Ultraviolet radiation, Aerospace engineering, Laser damage threshold, Laser applications, Photomicroscopy, Antireflective coatings

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Proceedings Article | 5 January 2018 Open Access

Qualification of laser optics for upcoming ESA space laser missions

Wolfgang Riede, Paul Allenspacher, Alessandra Ciapponi, Helmut Schröder, Denny Wernham, Fabio Era, Dominique Thibault

Proceedings Volume 10564, 105642K (2018) https://doi.org/10.1117/12.2309267

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Proceedings Article | 21 November 2017 Open Access

Laser damage test bench for space optics

Wolfgang Riede, Paul Allenspacher

Proceedings Volume 10568, 105681X (2017) https://doi.org/10.1117/12.2307975

KEYWORDS: Laser induced damage, Laser sources, Nd:YAG lasers, Near field optics, Optical components, Pulsed laser operation, Sapphire lasers, Laser systems engineering, Optical testing, Inspection

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Proceedings Article | 6 December 2016 Paper

Verification for robustness to laser-induced damage for the Aladin instrument on the ADM-Aeolus satellite

Denny Wernham, Alessandra Ciapponi, Wolfgang Riede, Paul Allenspacher, Fabio Era, Alessandro D'Ottavi, Dominique Thibault

Proceedings Volume 10014, 1001408 (2016) https://doi.org/10.1117/12.2245545

KEYWORDS: Laser induced damage, Satellites, Contamination, Coating, Aerospace engineering, Oxygen, Ultraviolet radiation, Space telescopes, Telescopes, Mirrors

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Proceedings Article | 6 December 2016 Paper

Investigation of laser-induced ablation of ceramic materials for spaceborne applications

H. Schroeder, M. Hippler, P. Allenspacher, W. Riede, A. Ciapponi, A. Mateo, T. Ivanov, J. Alves, J. Piris, C. Heese, D. Wernham

Proceedings Volume 10014, 100141K (2016) https://doi.org/10.1117/12.2244507

KEYWORDS: Laser ablation, Ceramics, Laser damage threshold, Particles, Aluminum, Scanning electron microscopy, Silicon carbide, Inspection, Copper, Microscopy

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Proceedings Article | 4 November 2014 Paper

Harmonisation of two nanosecond laser-induced damage testing facilities at 1064 nm in vacuum and ambient pressure

C. Heese, A. Ciapponi, J. Piris, T. Ivanov, P. Allenspacher, M. Lammers, H. Schröder, W. Riede

Proceedings Volume 9237, 923719 (2014) https://doi.org/10.1117/12.2066847

KEYWORDS: Laser damage threshold, Laser induced damage, Silicon, Semiconducting wafers, Data acquisition, Diodes, Damage detection, Optical testing, Nd:YAG lasers, Aerospace engineering

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Proceedings Article | 31 October 2014 Paper

An empirical investigation of the laser survivability curve: V

Jonathan Arenberg, Wolfgang Riede, Allesandra Ciapponi, Paul Allenspacher, Jon Herringer, Denny Wernham

Proceedings Volume 9237, 923723 (2014) https://doi.org/10.1117/12.2068257

KEYWORDS: Laser damage threshold, Data modeling, Aerospace engineering, Laser induced damage, Physics, Thin films, Optical testing, Laser optics, Laser processing, Current controlled current source

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Proceedings Article | 15 November 2013 Paper

An empirical investigation of the laser survivability curve: IV

Jonathan Arenberg, Wolfgang Riede, Alessandra Ciapponi, Paul Allenspacher, Jon Herringer, Denny Wernham

Proceedings Volume 8885, 88851P (2013) https://doi.org/10.1117/12.2030390

KEYWORDS: Data modeling, Aerospace engineering, Solids, Physics, Thin films, Laser processing, Data analysis, Laser damage threshold, Laser induced damage, Current controlled current source

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Proceedings Article | 14 November 2013 Paper

Round-Robin experiment on LIDT measurements at 1064 nm in vacuum for space qualification of optics

Stefan Schrameyer, Heinrich Mädebach, Lars Jensen, Detlev Ristau, Clemens Heese, Jorge Piris, Alessandra Ciapponi, Bruno Sarti, Paul Allenspacher, Melanie Lammers, Wolfgang Riede, Andrius Melninkaitis, Gintarė Batavičiūtė, Linas Smalakys, Valdas Sirutkaitis

Proceedings Volume 8885, 88850F (2013) https://doi.org/10.1117/12.2030098

KEYWORDS: Coating, Antireflective coatings, Standards development, Error analysis, Mirrors, Laser damage threshold, Laser induced damage, Optical testing, Data modeling, Laser sources

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Proceedings Article | 14 November 2013 Paper

From ground to space: how to increase the confidence level in your flight optics

W. Riede, P. Allenspacher, M. Lammers, D. Wernham, A. Ciapponi, C. Heese, L. Jensen, H. Maedebach, S. Schrameyer, D. Ristau

Proceedings Volume 8885, 88850D (2013) https://doi.org/10.1117/12.2030296

KEYWORDS: Raster graphics, Coating, Ultraviolet radiation, Laser induced damage, Space operations, Contamination, UV optics, Laser damage threshold, Optical components, Photomicroscopy

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Proceedings Article | 4 December 2012 Paper

An empirical investigation of the laser survivability curve: III

Jon Herringer, Wolfgang Riede, Alessandra Ciapponi, Paul Allenspacher, Jonathan Arenberg

Proceedings Volume 8530, 85301N (2012) https://doi.org/10.1117/12.977477

KEYWORDS: Manufacturing, Polishing, Antireflective coatings, Aerospace engineering, Laser induced damage, Coating, Thin films, Physics, Optical testing, Laser optics

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Proceedings Article | 23 November 2011 Paper

An empirical investigation of the laser survivability curve: II

Jonathan Arenberg, Wolfgang Riede, Alessandra Ciapponi, Paul Allenspacher, Jon Herringer

Proceedings Volume 8190, 819019 (2011) https://doi.org/10.1117/12.899271

KEYWORDS: Standards development, Surface plasmons, Optical testing, Aerospace engineering, Laser induced damage, Statistical analysis, Physics, Thin films, Atmospheric optics, Laser optics

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Proceedings Article | 2 December 2010 Paper

An empirical investigation of the laser survivability curve

Jonathan Arenberg, Wolfgang Riede, Alessandra Ciapponi, Paul Allenspacher, Jon Herringer

Proceedings Volume 7842, 78421B (2010) https://doi.org/10.1117/12.867349

KEYWORDS: Statistical analysis, Laser damage threshold, Data modeling, Aerospace engineering, Thin films, Laser induced damage, Laser safety, Standards development, Atmospheric corrections, Data corrections

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Proceedings Article | 29 November 2010 Paper

S on 1 testing of AR and HR designs at 1064nm

Alessandra Ciapponi, Paul Allenspacher, Wolfgang Riede, Jon Herringer, Jon Arenberg

Proceedings Volume 7842, 78420J (2010) https://doi.org/10.1117/12.867284

KEYWORDS: Optical coatings, Error analysis, Antireflective coatings, Laser optics, Optical testing, Databases, Standards development, Laser induced damage, Laser sources, Data modeling

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Proceedings Article | 31 December 2009 Paper

Aspects of laser optics qualification for space applications

Wolfgang Riede, Paul Allenspacher, Helmut Schröder, Peter Mahnke, Gabriela Paunescu, Denny Wernham

Proceedings Volume 7504, 75040T (2009) https://doi.org/10.1117/12.837384

KEYWORDS: Crystals, Laser optics, Optical coatings, Space operations, Optical components, Laser induced damage, Ferroelectric materials, Contamination, Laser systems engineering, Nd:YAG lasers

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Proceedings Article | 30 December 2008 Paper

TIR-based photothermal/photoacoustic deflection

Wolfgang Riede, Paul Allenspacher, J. Franck

Proceedings Volume 7132, 71320S (2008) https://doi.org/10.1117/12.804092

KEYWORDS: Photoacoustic spectroscopy, Acoustics, Helium neon lasers, Plasma, Laser beam diagnostics, Pulsed laser operation, Reflection, Prisms, Wave propagation, Nd:YAG lasers

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Proceedings Article | 30 December 2008 Paper

Analysis of the air-vacuum effect in dielectric coatings

Wolfgang Riede, Paul Allenspacher, L. Jensen, M. Jupé

Proceedings Volume 7132, 71320F (2008) https://doi.org/10.1117/12.804095

KEYWORDS: Optical coatings, Laser induced damage, Dielectrics, Laser systems engineering, Ions, Transmission electron microscopy, Space operations, Laser optics, Atmospheric optics, Doppler effect

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Proceedings Article | 30 December 2008 Paper

Growth mechanisms for laser induced contamination on space optics in vacuum

Adrian Tighe, Federico Pettazzi, Jorge Alves, Denny Wernham, W. Riede, H. Schroeder, P. Allenspacher, H. Kheyrandish

Proceedings Volume 7132, 71321L (2008) https://doi.org/10.1117/12.804423

KEYWORDS: Luminescence, Contamination, Laser irradiation, Astronomical imaging, Chemical analysis, Laser optics, Optical testing, Optical interferometry, Silica, Polyurethane

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Proceedings Article | 20 December 2007 Paper

Comparison of Gaussian and top-hat beam profiles in LIDT testing

L. Jensen, M. Jupe, K. Starke, D. Ristau, W. Riede, P. Allenspacher

Proceedings Volume 6720, 672013 (2007) https://doi.org/10.1117/12.752873

KEYWORDS: Laser damage threshold, Gaussian beams, Coating, Hybrid fiber optics, Standards development, Ultraviolet radiation, Reflectors, Laser induced damage, Pulsed laser operation, Laser systems engineering

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Proceedings Article | 15 January 2007 Paper

Damage threshold investigations of high-power laser optics under atmospheric and vacuum conditions

L. Jensen, M. Jupé, H. Mädebach, H. Ehlers, K. Starke, D. Ristau, W. Riede, P. Allenspacher, H. Schroeder

Proceedings Volume 6403, 64030U (2007) https://doi.org/10.1117/12.696443

KEYWORDS: Coating, Laser damage threshold, Antireflective coatings, Atmospheric optics, Tantalum, Dielectrics, Transmittance, Laser optics, Aerospace engineering, Ions

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Proceedings Article | 15 January 2007 Paper

Laser qualification testing of space optics

Paul Allenspacher, Wolfgang Riede, Denny Wernham

Proceedings Volume 6403, 64030T (2007) https://doi.org/10.1117/12.695222

KEYWORDS: Laser optics, Optical testing, Laser induced damage, Ultraviolet radiation, Nd:YAG lasers, Laser damage threshold, Aerospace engineering, Laser development, Astronomical imaging, Optical coatings

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Proceedings Article | 18 April 2006 Paper

Risk mitigation in spaceborne lasers

Yngve Lien, Elmar Reinhold, Denny Wernham, Martin Endemann, Michael Jost, Errico Armandillo, Wolfgang Riede, Helmut Schröder, Paul Allenspacher

Proceedings Volume 6182, 618202 (2006) https://doi.org/10.1117/12.683061

KEYWORDS: Laser induced damage, Laser damage threshold, Contamination, LIDAR, Aerospace engineering, Optical coatings, Luminescence, Wind measurement, Pulsed laser operation, Cameras

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Proceedings Article | 7 February 2006 Paper

Vacuum laser damage test bench

Paul Allenspacher, Wolfgang Riede, Denny Wernham, Annalisa Capanni, Fabio Era

Proceedings Volume 5991, 599128 (2006) https://doi.org/10.1117/12.638550

KEYWORDS: Nd:YAG lasers, Laser optics, Laser induced damage, Ultraviolet radiation, Silica, Optical testing, Data acquisition, Pulsed laser operation, Laser damage threshold, Light scattering

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Proceedings Article | 7 February 2006 Paper

Laser-induced hydrocarbon contamination in vacuum

Wolfgang Riede, Paul Allenspacher, Helmut Schröder, Denny Wernham, Yngve Lien

Proceedings Volume 5991, 59910H (2006) https://doi.org/10.1117/12.638765

KEYWORDS: Nd:YAG lasers, Contamination, Photomicroscopy, Carbon, Sensors, X-rays, Transmission electron microscopy, Oxygen, Dielectric polarization, Digital image correlation

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Proceedings Article | 10 June 2004 Paper

Results of a round-robin experiment in multiple-pulse LIDT measurement with ultrashort pulses

Kai Starke, Detlev Ristau, Sven Martin, Andreas Hertwig, Joerg Krueger, Paul Allenspacher, Wolfgang Riede, Stefan Meister, Christoph Theiss, Ali Sabbah, Wolfgang Rudolph, Volker Raab, Rimantas Grigonis, Tomas Rakickas, Valdas Sirutkaitis

Proceedings Volume 5273, (2004) https://doi.org/10.1117/12.525135

KEYWORDS: Mirrors, Ultrafast phenomena, Standards development, Inspection, Microscopes, Laser damage threshold, Silica, Pulsed laser operation, Coating, Damage detection

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Proceedings Article | 10 June 2004 Paper

Multiple ultrashort-pulse damage of AR-coated beta-barium borate

Paul Allenspacher, Ralf Baehnisch, Wolfgang Riede

Proceedings Volume 5273, (2004) https://doi.org/10.1117/12.524383

KEYWORDS: Picosecond phenomena, Coating, Laser damage threshold, Laser systems engineering, Pulsed laser operation, Cameras, Photomicroscopy, Second-harmonic generation, Sapphire lasers, Crystals

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Proceedings Article | 30 May 2003 Paper

Ultrashort pulse damage of Si and Ge semiconductors

Paul Allenspacher, Bernd Huettner, Wolfgang Riede

Proceedings Volume 4932, (2003) https://doi.org/10.1117/12.472053

KEYWORDS: Silicon, Picosecond phenomena, Germanium, Laser damage threshold, Ultrafast phenomena, Pulsed laser operation, Semiconductors, Electrons, Laser induced damage, Semiconducting wafers

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Showing 5 of 30 publications

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