Dr. Helmut B. Schröder Profile

Dr. Helmut B. Schröder

at Deutsches Zentrum für Luft- und Raumfahrt eV

SPIE Involvement:

Author

Publications (22)

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

Read Abstract +

DOWNLOAD PAPER

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

Read Abstract +

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

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 21 November 2017 Open Access

Investigation of laser induced deposit formation under space conditions

H. Schröder, S. Borgmann, W. Riede, Denny Wernham

Proceedings Volume 10566, 105661K (2017) https://doi.org/10.1117/12.2308207

KEYWORDS: Luminescence, Silicon, Contamination, Semiconductor lasers, Temperature metrology, Silica, Epoxies, Pulsed laser operation, Polyurethane, Ultraviolet radiation

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 21 November 2017 Open Access

Investigation of UV laser induced depositions on optics under space conditions in presence of outgassing materials

Helmut Schröder, Wolfgang Riede, Hamid Kheyrandish, Denny Wernham, Yngve Lien

Proceedings Volume 10567, 1056738 (2017) https://doi.org/10.1117/12.2308066

KEYWORDS: Luminescence, Ultraviolet radiation, Epoxies, UV optics, Astronomical imaging, Contamination, Silicon, Polyurethane, Optical testing, Microscopes

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 25 September 2017 Open Access

Caveats and pitfalls of high energy UV laser operation on ground

L. Mondin, D. Wernham, F. Era, H. Kheyrandish, A. Bolkhovitinov, A. Baselga Mateo, A. Ciapponi, C. Heese, T. Ivanov, M. Hippler, D. Thibault, G. Van Papendrecht, W. Riede, Y. Butenko, H. Schröder

Proceedings Volume 10562, 105621U (2017) https://doi.org/10.1117/12.2296209

Read Abstract +

DOWNLOAD PAPER

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

Read Abstract +

Proceedings Article | 27 September 2016 Paper

Laser-induced contamination of space borne laser systems: impact of organic contamination and mitigation by oxygen

M. Hippler, P. Wagner, H. Schroeder, W. Riede

Proceedings Volume 9952, 99520N (2016) https://doi.org/10.1117/12.2236897

KEYWORDS: Contamination, Oxygen, Laser systems engineering, Molecular lasers, Protactinium, Luminescence, Ultraviolet radiation, Beam splitters, Microscopy, Inspection

Read Abstract +

Proceedings Article | 4 November 2014 Paper

Enhancement of contamination growth and damage by absorption centers under UV irradiation

I. Balasa, M. Hippler, H. Schröder, L. Jensen, M. Gauch, D. Ristau, W. Riede

Proceedings Volume 9237, 92372A (2014) https://doi.org/10.1117/12.2085138

KEYWORDS: Contamination, Absorption, Nanoparticles, Ultraviolet radiation, Gold, Particles, Optical coatings, Scanning electron microscopy, Antireflective coatings, Atmospheric particles

Read Abstract +

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

Read Abstract +

Proceedings Article | 31 October 2014 Paper

In-situ laser-induced contamination monitoring using long-distance microscopy

Paul Wagner, Helmut Schröder, Wolfgang Riede

Proceedings Volume 9237, 92372B (2014) https://doi.org/10.1117/12.2066465

KEYWORDS: Contamination, Luminescence, Microscopes, Coating, Microscopy, Ultraviolet radiation, Reflection, Reflectivity, Photomicroscopy, Laser systems engineering

Read Abstract +

Proceedings Article | 22 September 2014 Paper

Nonlinear optical frequency conversion with KTP and BiBO crystals for lasers in space

Arne Potreck, Helmut Schröder, Melanie Lammers, Georgios Tzeremes, Wolfgang Riede

Proceedings Volume 9238, 923808 (2014) https://doi.org/10.1117/12.2074329

KEYWORDS: Crystals, Ferroelectric materials, Nonlinear crystals, Second-harmonic generation, Laser crystals, Frequency conversion, Absorption, Harmonic generation, Wavefronts, Nd:YAG lasers

Read Abstract +

Proceedings Article | 14 November 2013 Paper

Laser-induced contamination and its impact on laser damage threshold

H. Schröder, P. Wagner, D. Kokkinos, W. Riede, A. Tighe

Proceedings Volume 8885, 88850R (2013) https://doi.org/10.1117/12.2030002

KEYWORDS: Contamination, Coating, Silica, Luminescence, Laser damage threshold, Atomic force microscopy, Sputter deposition, Digital image correlation, Photomicroscopy, Laser induced damage

Read Abstract +

Proceedings Article | 28 November 2011 Paper

Laser-induced contamination on space optics

Wolfgang Riede, Helmut Schroeder, Gintare Bataviciute, Denny Wernham, Adrian Tighe, Federico Pettazzi, Jorge Alves

Proceedings Volume 8190, 81901E (2011) https://doi.org/10.1117/12.899190

KEYWORDS: Contamination, Ultraviolet radiation, Luminescence, Pulsed laser operation, Epoxies, Laser systems engineering, Space operations, Laser optics, Sensors, Silicon

Read Abstract +

Proceedings Article | 5 February 2011 Paper

Non-linear optical frequency conversion crystals for space applications

Alessandra Ciapponi, Wolfgang Riede, Georgios Tzeremes, Helmut Schröder, Peter Mahnke

Proceedings Volume 7912, 791205 (2011) https://doi.org/10.1117/12.878587

KEYWORDS: Crystals, Second-harmonic generation, Frequency conversion, Crystal optics, Space operations, Laser crystals, Nonlinear crystals, Ferroelectric materials, Nonlinear optics, Phase matching

Read Abstract +

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

Read Abstract +

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

Read Abstract +

Proceedings Article | 20 December 2007 Paper

Fluorescence monitoring of organic deposits

H. Schröder, S. Becker, Y. Lien, W. Riede, D. Wernham

Proceedings Volume 6720, 67200O (2007) https://doi.org/10.1117/12.752866

KEYWORDS: Luminescence, Ultraviolet radiation, Semiconductor lasers, Contamination, Photomultipliers, Laser induced fluorescence, Silica, UV optics, Microscopes, Fluorescence spectroscopy

Read Abstract +

Proceedings Article | 15 January 2007 Paper

In situ observation of UV-laser-induced deposit formation by fluorescence measurement

H. Schröder, W. Riede, E. Reinhold, D. Wernham, Y. Lien, H. Kheyrandish

Proceedings Volume 6403, 64031K (2007) https://doi.org/10.1117/12.695347

KEYWORDS: Luminescence, Contamination, Chemical analysis, Ultraviolet radiation, Polyurethane, Silicon, In situ metrology, Silica, Fluorescence spectroscopy, Epoxies

Read Abstract +

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

Read Abstract +

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

Read Abstract +

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

Read Abstract +

Showing 5 of 22 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years