Mr. Friedhelm Dorsch Profile

Friedhelm Dorsch

at Consultant

SPIE Involvement:

Author | Editor

Area of Expertise:

Diode lasers , Laser application , Sensor systems , Semiconductors

Proceedings Article | 27 February 2019 Paper

Controlling laser processing via optical coherence topography

F. Dorsch, W. Dubitzky, J.-P. Hermani, A. Hromadka, T. Hesse, T. Notheis, M. Stambke

Proceedings Volume 10911, 109110G (2019) https://doi.org/10.1117/12.2509630

KEYWORDS: Optical coherence tomography, Laser processing, Laser welding, Cameras, Aluminum, Beam shaping, Laser optics, Laser applications, 3D image processing

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Proceedings Article | 22 February 2017 Presentation + Paper

Capillary depth measurement for process control

F. Dorsch, W. Dubitzky, L. Effing, P. Haug, J.-P. Hermani, S. Plasswich

Proceedings Volume 10097, 1009708 (2017) https://doi.org/10.1117/12.2250108

KEYWORDS: Optical coherence tomography, Laser welding, Capillaries, Interferometers, Laser beam diagnostics, Process control, Laser applications, Inspection, Scanners, 3D scanning, Laser scanners, Optical testing

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Proceedings Article | 20 February 2014 Paper

Online NIR diagnostic of laser welding processes and its potential for quality assuring sensor systems

Friedhelm Dorsch, Holger Braun, Steffen Keβler, Dieter Pfitzner, Volker Rominger

Proceedings Volume 8963, 89630R (2014) https://doi.org/10.1117/12.2041268

KEYWORDS: Image processing, Sensors, Near infrared, Image fusion, Metals, Laser welding, Laser processing, Cameras, Thermography, Scanners

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Proceedings Article | 26 February 2013 Paper

Online characterization of laser beam welds by NIR-camera observation

Friedhelm Dorsch, Holger Braun, Steffen Keßler, Dieter Pfitzner, Volker Rominger

Proceedings Volume 8603, 86030R (2013) https://doi.org/10.1117/12.2004196

KEYWORDS: Pyrometry, Cameras, Sensors, Near infrared, Thermography, Image processing, Laser processing, Temperature metrology, Signal detection, Laser welding

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Proceedings Article | 7 February 2012 Paper

NIR-camera-based online diagnostics of laser beam welding processes

Friedhelm Dorsch, Holger Braun, Steffen Keßler, Dieter Pfitzner, Volker Rominger

Proceedings Volume 8239, 82390T (2012) https://doi.org/10.1117/12.908646

KEYWORDS: Near infrared, Image processing, Sensors, Cameras, Laser processing, Diagnostics, Laser welding, Thermography, Indium gallium arsenide, Metals

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Proceedings Article | 3 February 2009 Paper

Coherent combination of slab-coupled optical waveguide lasers

Robin Huang, Bien Chann, Leo Missaggia, Steven Augst, Michael Connors, George Turner, Antonio Sanchez-Rubio, Joseph Donnelly, John Hostetler, Carl Miester, Friedhelm Dorsch

Proceedings Volume 7230, 72301G (2009) https://doi.org/10.1117/12.816748

KEYWORDS: Semiconductor lasers, Amplifiers, Optical amplifiers, Coherent beam combination, Coating, Waveguides, Laser optics, Optical components, Continuous wave operation

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Proceedings Article | 25 February 2008 Paper

Passive cooling effects of low and high fill-factor 937 nm 1 cm arrays

John Hostetler, Ching-Long Jiang, Robert Roff, Viorel Negoita, Stephan Strohmaier, Christoph Tillkorn, Radosveta Radionova, Carl Miester, Thilo Vethake, Ulrich Bonna, Martin Huonker, Christian Schmitz, Friedhelm Dorsch

Proceedings Volume 6876, 68760A (2008) https://doi.org/10.1117/12.763443

KEYWORDS: Data modeling, 3D modeling, Diodes, Resistance, Thermal modeling, Semiconductor lasers, Electro optical modeling, Thermal effects, Curium, Copper

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Proceedings Article | 6 February 2007 Paper

Thermal and strain characteristics of high-power 940 nm laser arrays mounted with AuSn and In solders

John Hostetler, Ching-Long Jiang, Viorel Negoita, Thilo Vethake, Robert Roff, Ashutosh Shroff, Ting Li, Carl Miester, Ulrich Bonna, Greg Charache, Holger Schlüter, Friedhelm Dorsch

Proceedings Volume 6456, 645602 (2007) https://doi.org/10.1117/12.702022

KEYWORDS: Polarization, Resistance, Quantum wells, Indium, Temperature metrology, High power lasers, Data modeling, Thermal modeling, Diodes, Laser welding

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Proceedings Article | 25 April 2000 Paper

RGB lasers for laser projection displays

Guenter Hollemann, Bernhard Braun, Friedhelm Dorsch, Petra Hennig, Peter Heist, Ulf Krause, Uwe Kutschki, Hermann Voelckel

Proceedings Volume 3954, (2000) https://doi.org/10.1117/12.383365

KEYWORDS: Semiconductor lasers, Optical parametric oscillators, RGB color model, Optical amplifiers, Diodes, Fiber coupled lasers, Modulation, Oscillators, Laser systems engineering, Collimation

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Proceedings Article | 3 April 2000 Paper

2-kW cw fiber-coupled diode laser system

Friedhelm Dorsch, Franz Daiminger, Petra Hennig, Veit Bluemel

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380893

KEYWORDS: Semiconductor lasers, Laser systems engineering, Fiber lasers, Collimation, Continuous wave operation, High power lasers, Fiber coupled lasers, Materials processing, Fiber couplers, Beam shaping

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Proceedings Article | 29 March 2000 Paper

Fiber-coupled diode laser systems up to 2-kW output power

Friedhelm Dorsch, Veit Bluemel, Matthias Schroeder, Dirk Lorenzen, Petra Hennig, Detlev Wolff

Proceedings Volume 3945, (2000) https://doi.org/10.1117/12.380554

KEYWORDS: Semiconductor lasers, Fiber lasers, Fiber coupled lasers, Beam shaping, Fiber couplers, Laser systems engineering, Multimode fibers, Electro optics, Laser development, Materials processing

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Proceedings Article | 1 April 1999 Paper

Performance and lifetime of high-power diode lasers and diode laser systems

Friedhelm Dorsch, Franz Daiminger

Proceedings Volume 3628, (1999) https://doi.org/10.1117/12.344546

KEYWORDS: Semiconductor lasers, Laser systems engineering, High power lasers, Beam shaping, Fiber lasers, Continuous wave operation, Fiber coupled lasers, Optical fibers, Fiber couplers, Optical components

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Proceedings Article | 29 December 1998 Paper

High-power laser diodes, laser diode modules, and their applications

Franz Daiminger, Friedhelm Dorsch, Dirk Lorenzen

Proceedings Volume 3682, (1998) https://doi.org/10.1117/12.334785

KEYWORDS: Semiconductor lasers, High power diode lasers, High power lasers, Diodes, Heatsinks, Resistance, Copper, Collimation, Materials processing, Solid state lasers

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Proceedings Article | 4 May 1998 Paper

High-brightness fiber-coupled diode laser module

Friedhelm Dorsch, Petra Hennig, Michael Nickel

Proceedings Volume 3285, (1998) https://doi.org/10.1117/12.307606

KEYWORDS: Semiconductor lasers, Collimation, Prisms, Mirrors, Optical components, Optical fibers, Fiber lasers, High power lasers, Beam shaping, Reflectivity

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Proceedings Article | 20 April 1998 Paper

Aging properties of AlGaAs/GaAs high-power diode lasers

Franz Daiminger, Friedhelm Dorsch, Stefan Heinemann

Proceedings Volume 3244, (1998) https://doi.org/10.1117/12.306991

KEYWORDS: High power lasers, Semiconductor lasers, Heatsinks, High power diode lasers, Temperature metrology

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Proceedings Article | 20 November 1996 Paper

Aging tests of high-power diode lasers as a basis for an international lifetime standard

Friedhelm Dorsch, Franz Daiminger

Proceedings Volume 2870, (1996) https://doi.org/10.1117/12.259922

KEYWORDS: Semiconductor lasers, Diodes, High power diode lasers, High power lasers, Optics manufacturing, Laser damage threshold, Continuous wave operation, Heatsinks, Standards development, Semiconducting wafers

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Proceedings Article | 20 November 1996 Paper

Beam characterization of an industrial CO2 laser: results of a workshop within the EUREKA project EU-1269 "CHOCLAB"

H. Bartels, Peter Boerger, Friedhelm Dorsch, Bernd Eppich, Uwe Habich, Ruediger Maestle, Holger Muentz, Wilfried Plass, R. Pohl, U. Quattelbaum, Marcus Scholl, Laura Serri, H. Staubach, Emanuele Stucchi, C. Wild, Norbert Wolf

Proceedings Volume 2870, (1996) https://doi.org/10.1117/12.259912

KEYWORDS: Carbon dioxide lasers, Mirrors, Beam propagation method, Standards development, Laser beam propagation, Optical testing, Beam splitters, Data processing, Data acquisition, Cameras

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Proceedings Article | 1 July 1991 Paper

High-resolution spectral characterization of high-power laser diodes

Friedhelm Dorsch

Proceedings Volume 1418, (1991) https://doi.org/10.1117/12.43833

KEYWORDS: Semiconductor lasers, Heatsinks, Diodes, Pulsed laser operation, High power lasers, Solid state lasers, Laser applications, Monochromators, Laser development, Fiber lasers

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