Dr. Georg Treusch Profile

Dr. Georg Treusch

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Publications (26)

Proceedings Article | 13 March 2015 Paper

Paper

Advancements in high-power high-brightness laser bars and single emitters for pumping and direct diode application

Haiyan An, Ching-Long Jiang, Yihan Xiong, Qiang Zhang, Aloysius Inyang, Jason Felder, Alexander Lewin, Robert Roff, Stefan Heinemann, Berthold Schmidt, Georg Treusch

Proceedings Volume 9348, 93480I (2015) https://doi.org/10.1117/12.2080175

KEYWORDS: Semiconductor lasers, Diodes, Fiber lasers, High power lasers, Laser systems engineering, Reliability, Laser development, Disk lasers, Fiber couplers, Packaging

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Proceedings Article | 13 March 2015 Paper

Paper

Packaging of high-power bars for optical pumping and direct applications

Stefan Heinemann, Haiyan An, Tobias Barnowski, John Jiang, Viorel Negoita, Robert Roff, Thilo Vethake, Konstantin Boucke, Georg Treusch

Proceedings Volume 9348, 934807 (2015) https://doi.org/10.1117/12.2080968

KEYWORDS: Packaging, Reliability, Multiplexing, Copper, Optical pumping, Semiconductor lasers, Diodes, Heatsinks, Disk lasers, Ceramics

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Proceedings Article | 26 February 2015 Paper

Paper

High peak power diode stacks for high energy lasers

Viorel Negoita, Thilo Vethake, John Jiang, Robert Roff, Ming Shih, Richard Duck, Marc Bauer, Roberto Mite, Konstantin Boucke, Georg Treusch

Proceedings Volume 9345, 934504 (2015) https://doi.org/10.1117/12.2080489

KEYWORDS: Semiconductor lasers, Fusion energy, Collimation, Laser energy, Neodymium, Diodes, Heatsinks, Pulsed laser operation, Laser development, Laser welding

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Proceedings Article | 7 March 2014 Paper

Paper

Wavelength stabilization of high power laser systems using volume holographic gratings

Viorel Negoita, Yufeng Li, Tobias Barnowski, John Jiang, Haiyan An, Robert Roff, Ming Shih, Thilo Vethake, Tina Gottwald, Sven Schad, Georg Treusch

Proceedings Volume 8965, 89650S (2014) https://doi.org/10.1117/12.2040622

KEYWORDS: Laser systems engineering, High power lasers, Disk lasers, Reflectivity, Volume holography, Holography, Pulsed laser operation, Semiconductor lasers, Absorption, Diodes

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Proceedings Article | 7 March 2014 Paper

Paper

Methods for slow axis beam quality improvement of high power broad area diode lasers

Haiyan An, Yihan Xiong, Ching-Long Jiang, Berthold Schmidt, Georg Treusch

Proceedings Volume 8965, 89650U (2014) https://doi.org/10.1117/12.2040986

KEYWORDS: Waveguides, Semiconductor lasers, Thermal effects, Broad area laser diodes, Refractive index, Laser systems engineering, Near field, High power lasers, Fiber coupled lasers, Optical filters

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Proceedings Article | 26 February 2013 Paper

Paper

High brightness laser systems incorporating advanced laser bars

Stephan Strohmaier, Thilo Vethake, Mark Gottdiener, Jens Wunderlin, Viorel Negoita, Yufeng Li, Tobias Barnowski, Tim Gong, Haiyan An, Georg Treusch

Proceedings Volume 8605, 86050J (2013) https://doi.org/10.1117/12.2004927

KEYWORDS: Semiconductor lasers, Laser systems engineering, High power lasers, Disk lasers, Fiber couplers, Laser development, Laser applications, Collimation, Photonics, Solid state lasers

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Proceedings Article | 26 February 2013 Paper

Paper

Advances in high power and high brightness laser bars with enhanced reliability

Haiyan An, Ching-Long (John) Jiang, Yihan Xiong, Aloysius Inyang, Qiang Zhang, Alexander Lewin, Stephan Strohmaier, Georg Treusch

Proceedings Volume 8605, 86050U (2013) https://doi.org/10.1117/12.2004979

KEYWORDS: Reliability, Semiconductor lasers, Polarization, High power lasers, Diodes, Packaging, Laser systems engineering, Plating, Failure analysis, Semiconducting wafers

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The advances in laser-diode technology have enabled high efficiency direct diode base modules to emerge as a building block for industrial high power laser systems. Consequently, these systems have been implemented with advance robust, higher-brightness and reliable laser sources for material processing application. Here at the company, we use low-fill factor bars to build fiber-coupled and passively cooled modules, which form the foundation for “TruDiode,” the series of TRUMPF direct diode laser systems that can perform in the multi-kilowatt arena with high beam quality. However, higher reliable output power, additional efficiency and greater slow axis beam quality of the high power laser bars are necessary to further increase the brightness and reduce the cost of the systems. In order to improve the slow axis beam quality, we have optimized the bar epitaxial structures as well as the lateral design. The detailed near field and far field studies of the slow axis for each individual emitters on the bar provide us with information about the dependency of beam quality as a function of the drive current. Based on these study results for direct diode application, we have optimized the high brightness bar designs at 900-1070nm wavelengths. In addition, high power and high efficiency laser bars with high fill factors have been used to build the pump sources for thin disc laser systems at TRUMPF Photonics. For better system performances with lower costs, we have further optimized bar designs for this application. In this paper, we will give an overview of our recent advances in high power and brightness laser bars with enhanced reliability. We will exhibit beam quality study, polarization and reliability test results of our laser bars in the 900-1070nm wavelengths region for coarse wavelength multiplexing. Finally, we will also present the performance and reliability results of the 200W bar, which will be used for our next generation thin disk laser pump source.

Proceedings Article | 17 November 2005 Paper

Paper

Automated optical manufacturing test system for high power multi-bar diode modules

Sriraj Bhadra, Chuck Humble, Hoa Nguyen, Georg Treusch, Rajiv Pandey, John Bell

Proceedings Volume 5999, 59990O (2005) https://doi.org/10.1117/12.630729

KEYWORDS: Integrating spheres, Optics manufacturing, Semiconductor lasers, Sensors, Amplifiers, High power lasers, Lithium, Optical spheres, Data acquisition, Optical testing

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Proceedings Article | 17 March 2005 Paper

Paper

Reliability of water-cooled high-power diode laser modules

Georg Treusch, Raman Srinivasan, Dennis Brown, Robert Miller, Jim Harrison

Proceedings Volume 5711, (2005) https://doi.org/10.1117/12.598256

KEYWORDS: Corrosion, Diodes, Copper, Reliability, Semiconductor lasers, Heatsinks, Metals, High power lasers, Resistance, High power diode lasers

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Proceedings Article | 29 March 2000 Paper

Paper

Compact high-brightness and high-power diode laser source for materials processing

Hans-Georg Treusch, Jim Harrison, Robert Morris, Jeff Powers, Dennis Brown, Joey Martin

Proceedings Volume 3945, (2000) https://doi.org/10.1117/12.380541

KEYWORDS: Semiconductor lasers, Collimation, Beam shaping, Materials processing, Lenses, Optical fibers, Tolerancing, High power lasers, Reliability, Lasers

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Proceedings Article | 13 May 1998 Paper

Paper

Fiber-coupling technique for high-power diode laser arrays

Hans-Georg Treusch, Keming Du, Markus Baumann, Volker Sturm, Bodo Ehlers, Peter Loosen

Proceedings Volume 3267, (1998) https://doi.org/10.1117/12.308097

KEYWORDS: Semiconductor lasers, Diodes, Microlens, Collimation, Mirrors, Beam shaping, Fiber couplers, Manufacturing, Materials processing, Dielectric filters

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Proceedings Article | 4 May 1998 Paper

Paper

Optimization of microchannel heatsinks for high-power diode lasers in copper technology

Thomas Ebert, Hans-Georg Treusch, Peter Loosen, Reinhart Poprawe

Proceedings Volume 3285, (1998) https://doi.org/10.1117/12.307612

KEYWORDS: Copper, Resistance, Semiconductor lasers, Laser applications, High power lasers, Gallium arsenide, Heatsinks, Silicon, Continuous wave operation, Thermal effects

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Proceedings Article | 18 August 1997 Paper

Paper

Optimization of microchannel heat sinks for high-power diode lasers in copper technology

Thomas Ebert, Jens Biesenbach, Hans-Georg Treusch, Peter Loosen, Reinhart Poprawe

Proceedings Volume 3097, (1997) https://doi.org/10.1117/12.281119

KEYWORDS: Copper, Resistance, Semiconductor lasers, Laser applications, High power lasers, Gallium arsenide, Silicon, Continuous wave operation, Thermal effects, High power diode lasers

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Proceedings Article | 18 August 1997 Paper

Paper

Parallel diode-pumped frequency doubled Nd:YAG laser

Michael Quade, Keming Du, Stephan Falter, Jian Zhang, Hans-Georg Treusch, Peter Loosen, Reinhart Poprawe

Proceedings Volume 3097, (1997) https://doi.org/10.1117/12.281129

KEYWORDS: Crystals, Nd:YAG lasers, Resonators, Nonlinear crystals, Telescopes, Oscillators, Ferroelectric materials, Laser resonators, Second-harmonic generation, Reflectivity

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Proceedings Article | 18 August 1997 Paper

Paper

Micromachining by picosecond laser radiation: fundamentals and applications

Juergen Jandeleit, P. Russbueldt, Hans-Georg Treusch, Ernst-Wolfgang Kreutz

Proceedings Volume 3097, (1997) https://doi.org/10.1117/12.281082

KEYWORDS: Picosecond phenomena, Pulsed laser operation, Plasma, Silicon, Thin films, Ionization, Micromachining, Semiconductor lasers, Metals, Gold

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Proceedings Article | 18 August 1997 Paper

Paper

Compact fiber-coupled high-power diode-laser unit

Markus Baumann, Bodo Ehlers, Michael Quade, Keming Du, Hans-Georg Treusch, Peter Loosen, Reinhart Poprawe

Proceedings Volume 3097, (1997) https://doi.org/10.1117/12.281140

KEYWORDS: Multimode fibers, Fiber lasers, Materials processing

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Proceedings Article | 18 August 1997 Paper

Paper

Cylindrical microlenses for collimating high-power diode lasers

Volker Sturm, Hans-Georg Treusch, Peter Loosen

Proceedings Volume 3097, (1997) https://doi.org/10.1117/12.281141

KEYWORDS: Semiconductor lasers, Microlens, Diodes, Collimation, High power lasers, Glasses, Collimators, Materials processing, Refractive index, Lens design

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Proceedings Article | 18 August 1997 Paper

Paper

Beam shaping and fiber coupling of high-power diode laser arrays

Bodo Ehlers, Keming Du, Markus Baumann, Hans-Georg Treusch, Peter Loosen, Reinhart Poprawe

Proceedings Volume 3097, (1997) https://doi.org/10.1117/12.281128

KEYWORDS: Semiconductor lasers, Beam shaping, Mirrors, Diodes, Manufacturing, Materials processing, Collimation, Fiber coupled lasers, Fiber couplers, Multimode fibers

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Proceedings Article | 4 April 1997 Paper

Paper

Design and industrial applications of high-power diode-lasers

Peter Loosen, Jens Biesenbach, Keming Du, C. Haas, Reinhart Poprawe, Hans-Georg Treusch

Proceedings Volume 3092, (1997) https://doi.org/10.1117/12.270212

KEYWORDS: Semiconductor lasers, Diodes, Collimation, High power lasers, Materials processing, Laser welding, Laser applications, Solid state lasers, Laser systems engineering, Superposition

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Proceedings Article | 4 April 1997 Paper

Paper

Picosecond imaging of laser-induced ablation processes and production of microstructures by picosecond laser pulses

Juergen Jandeleit, P. Russbueldt, G. Urbasch, D. Hoffmann, Ernst-Wolfgang Kreutz, Hans-Georg Treusch

Proceedings Volume 3092, (1997) https://doi.org/10.1117/12.270113

KEYWORDS: Picosecond phenomena, Laser ablation, Diamond, Crystals, Metals, Copper, Gold, Silicon, Pulsed laser operation, Plasma

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Proceedings Article | 4 April 1997 Paper

Paper

Time-resolved investigation of the plasma expansion during picosecond laser material processing

G. Urbasch, F. Billmann, Juergen Jandeleit, P. Russbueldt, Hans-Georg Treusch, Ernst-Wolfgang Kreutz

Proceedings Volume 3093, (1997) https://doi.org/10.1117/12.271679

KEYWORDS: Plasma, Pulsed laser operation, Photography, Picosecond phenomena, Materials processing, Spherical lenses, Atmospheric plasma, Laser energy, High speed photography, Laser ablation

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Proceedings Article | 28 April 1995 Paper

Paper

High-power diode lasers and their direct industrial applications

Peter Loosen, Hans-Georg Treusch, C. Haas, U. Gardenier, Manfred Weck, V. Sinnhoff, S. Kasperowski, R. vor dem Esche

Proceedings Volume 2382, (1995) https://doi.org/10.1117/12.208435

KEYWORDS: Diodes, Semiconductor lasers, Copper, Laser applications, Collimation, Micro optics, Laser processing, Laser cutting, Laser welding, Lens design

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Proceedings Article | 30 September 1994 Paper

Paper

Fabrication of aspheric cylindrical microlenses with the diamond turning technology

Jens Biesenbach, Peter Loosen, Hans-Georg Treusch, Volker Krause, Arnd Koesters, Stefan Zamel, Wolfgang Hilgers

Proceedings Volume 2263, (1994) https://doi.org/10.1117/12.187997

KEYWORDS: Polymethylmethacrylate, Diamond turning, Aspheric lenses, Manufacturing, Microlens, Collimation, Adhesives, Lenses, Semiconductor lasers, Diodes

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Proceedings Article | 7 September 1994 Paper

Paper

Quality improvement of polymer parts by laser welding

Heidrun Puetz, Hans-Georg Treusch, M. Welz, Dirk Petring, Eckhard Beyer, Gerd Herziger

Proceedings Volume 2207, (1994) https://doi.org/10.1117/12.184747

KEYWORDS: Signal processing, Absorption, Laser welding, Ultrasonics, Laser processing, Polymers, Nd:YAG lasers, Laser applications, Manufacturing, Laser marking

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Proceedings Article | 16 August 1994 Paper

Paper

Modular 3 kW solid state laser with fiber optic beam delivery

Hans-Georg Treusch, Eckehard Onkels, H. Adamietz, Volker Krause, Peter Loosen

Proceedings Volume 2206, (1994) https://doi.org/10.1117/12.184605

KEYWORDS: Solid state lasers, Beam delivery, Multiplexers, Fiber optics, Optical fibers, Connectors, Mirrors, High power lasers, Multiplexing, Pulsed laser operation

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Proceedings Article | 1 June 1994 Paper

Paper

Microchannel coolers for high-power laser diodes in copper technology

Volker Krause, Hans-Georg Treusch, Peter Loosen, T. Kimpel, Jens Biesenbach, Arnd Koesters, F. Robert, H. Oestreicher, Marcel Marchiano, Bernhard DeOdorico

Proceedings Volume 2148, (1994) https://doi.org/10.1117/12.176631

KEYWORDS: Semiconductor lasers, Resistance, Copper, High power lasers, Semiconducting wafers, Diodes, Laser applications, Silicon, Diffusion, Solid state lasers

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Showing 5 of 26 publications

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