Dr. Ulrich Weichmann Profile

Dr. Ulrich Weichmann

at TRUMPF Photonic Components GmbH

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 15 March 2023 Presentation + Paper

Polarization multiplexing in VCSEL-arrays

Roman Koerner, Sven Bader, Markus Herper, Tobias Kischkat-Grimm, Jenny Tempeler, Alexander van der Lee, Holger Moench, Armand Pruijmboom, Manuel Aviles Rodriguez, Ulrich Weichmann, Alexander Weigl

Proceedings Volume 12439, 1243902 (2023) https://doi.org/10.1117/12.2647683

KEYWORDS: Polarization, Vertical cavity surface emitting lasers, Transmission electron microscopy, Polarization gratings, Multiplexing, Light sources and illumination, Fabrication, Birefringence, Reliability, Optical gratings

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Proceedings Article | 3 March 2022 Presentation + Paper

ViP-VCSEL with integrated photodiode and new applications

Holger Moench, Sven Bader, Ralph Gudde, Jochen Hellmig, Dominik Moser, Andrea Ott, Hans Spruit, Ulrich Weichmann, Susanne Weidenfeld

Proceedings Volume 12020, 1202006 (2022) https://doi.org/10.1117/12.2607345

KEYWORDS: Vertical cavity surface emitting lasers, Sensors, Photodiodes, Polarization, Particles, Eye, Velocity measurements, Modulation, Doppler effect, Signal to noise ratio

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Proceedings Article | 4 March 2016 Paper

Integrated high power VCSEL systems

Holger Moench, Ralf Conrads, Stephan Gronenborn, Xi Gu, Michael Miller, Pavel Pekarski, Jens Pollmann-Retsch, Armand Pruijmboom, Ulrich Weichmann

Proceedings Volume 9733, 97330V (2016) https://doi.org/10.1117/12.2210909

KEYWORDS: Vertical cavity surface emitting lasers, High power lasers, Laser processing, Laser systems engineering, Integrated optics, Reliability, Semiconducting wafers, Polymers, Resistance

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Proceedings Article | 13 March 2015 Paper

High-power VCSEL systems and applications

Holger Moench, Ralf Conrads, Carsten Deppe, Guenther Derra, Stephan Gronenborn, Xi Gu, Gero Heusler, Johanna Kolb, Michael Miller, Pavel Pekarski, Jens Pollmann-Retsch, Armand Pruijmboom, Ulrich Weichmann

Proceedings Volume 9348, 93480W (2015) https://doi.org/10.1117/12.2076267

KEYWORDS: Vertical cavity surface emitting lasers, Manufacturing, High power lasers, Laser systems engineering, Light emitting diodes, Reliability, Semiconducting wafers, Lamps, Photography, Heat treatments

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Proceedings Article | 4 March 2015 Paper

Efficiency optimization and analysis of 808nm VCSELs with a full electro-thermal-optical numerical model

Andreas Engelhardt, Johanna Kolb, Friedhard Roemer, Ulrich Weichmann, Holger Moench, Bernd Witzigmann

Proceedings Volume 9381, 93810M (2015) https://doi.org/10.1117/12.2077065

KEYWORDS: Vertical cavity surface emitting lasers, Doping, Electro optical modeling, Quantum wells, Electro optics, Optimization (mathematics), Oxides, Mirrors, Instrument modeling, 3D modeling

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SPIE Journal Paper | 23 January 2015

Temperature-dependent investigation of carrier transport, injection, and densities in AlGaAs-based multi-quantum-well active layers for vertical-cavity surface-emitting lasers

Andreas Engelhardt, Johanna Kolb, Friedhard Roemer, Ulrich Weichmann, Holger Moench, Bernd Witzigmann

OE, Vol. 54, Issue 01, 016107, (January 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.1.016107

KEYWORDS: Quantum wells, Vertical cavity surface emitting lasers, Electro optical modeling, Electrons, 3D modeling, Mirrors, Data modeling, Electro optics, Calibration, Temperature metrology

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Proceedings Article | 2 May 2014 Paper

Temperature dependent investigation of carrier transport, injection, and densities in 808 nm AlGaAs multi-quantum-well active layers for VCSELs

Andreas Engelhardt, Johanna Kolb, Friedhard Römer, Ulrich Weichmann, Holger Moench, Bernd Witzigmann

Proceedings Volume 9134, 91341G (2014) https://doi.org/10.1117/12.2051601

KEYWORDS: Quantum wells, Vertical cavity surface emitting lasers, Electrons, Electro optical modeling, Mirrors, Electro optics, Semiconductor lasers, Laser damage threshold, Data modeling, Calibration

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Proceedings Article | 3 March 2014 Paper

High power electrically pumped VECSELs and arrays

Holger Moench, Anastasia Andreadaki, Stephan Gronenborn, Johanna Kolb, Peter Loosen, Michael Miller, Thomas Schwarz, Alexander van der Lee, Ulrich Weichmann

Proceedings Volume 8966, 89660H (2014) https://doi.org/10.1117/12.2037578

KEYWORDS: Vertical cavity surface emitting lasers, Mirrors, Oxides, Electroluminescence, High power lasers, Doping, Optical testing, Near field optics, Semiconducting wafers, Resonators

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Proceedings Article | 27 February 2014 Paper

Optimized VCSELs for high-power arrays

Holger Moench, Johanna Kolb, Andreas Engelhardt, Philipp Gerlach, Roland Jaeger, Jens Pollmann-Retsch, Ulrich Weichmann, Bernd Witzigmann

Proceedings Volume 9001, 90010F (2014) https://doi.org/10.1117/12.2037608

KEYWORDS: Vertical cavity surface emitting lasers, Mirrors, Virtual colonoscopy, Resistance, Temperature metrology, Neodymium, Electro optics, Electroluminescence, Electro optical systems, Oxides

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Proceedings Article | 13 March 2013 Paper

VCSEL arrays with integrated optics

Holger Moench, Stephan Gronenborn, Xi Gu, Johanna Kolb, Michael Miller, Pavel Pekarski, Ulrich Weichmann

Proceedings Volume 8639, 86390M (2013) https://doi.org/10.1117/12.2000373

KEYWORDS: Vertical cavity surface emitting lasers, Semiconducting wafers, Glasses, Gallium arsenide, Optical alignment, Mirrors, Wafer bonding, Wafer-level optics, Micro optics, Neodymium

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Proceedings Article | 10 April 2005 Paper

Light-sources for small-etendue applications: a comparison of xenon- and UHP lamps

Ulrich Weichmann, Jan Cromwijk, Gero Heusler, Uwe Mackens, Holger Moench, Jens Pollmann-Retsch

Proceedings Volume 5740, (2005) https://doi.org/10.1117/12.590172

KEYWORDS: Lamps, Electrodes, Plasma, Electroluminescence, Mercury, Electrical efficiency, Combustion, RGB color model, Projection systems, Luminous efficacy

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Proceedings Article | 28 May 2004 Paper

UHP lamps for projection systems: getting always brighter, smaller, and even more colorful

Ulrich Weichmann, Hermann Giese, Ulrich Hechtfischer, Gero Heusler, Achim Koerber, Holger Moench, Folke-Charlotte Noertemann, Pavel Pekarski, Jens Pollmann-Retsch, Arnd Ritz

Proceedings Volume 5289, (2004) https://doi.org/10.1117/12.541159

KEYWORDS: Lamps, Reflectors, Projection systems, Electrodes, RGB color model, Mercury, Coating, Light sources, LCDs, Tungsten

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Showing 5 of 12 publications

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