Dr. Ferdinand Bammer Profile

Dr. Ferdinand Bammer

Assistant at Technische Univ Wien

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Author

Publications (19)

PROCEEDINGS ARTICLE | February 3, 2015

Laser assisted die bending: a new application of high power diode lasers

Proc. SPIE. 9255, XX International Symposium on High-Power Laser Systems and Applications 2014

KEYWORDS: Prisms, Titanium, Metals, High power lasers, Laser applications, Laser development, Semiconductor lasers, Laser cutting, High power diode lasers, Laser optics

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Nowadays high power lasers are mainly used for cutting of sheet metals, for welding, hardening and rapid prototyping. In the forming of sheet metals as bending or deep drawing lasers are not used. Nevertheless a few years ago a new application of high power lasers has been invented, where bending of materials that break at room temperature becomes possible by heating them along the bending edge with high power lasers thus allowing their treatment without cracks and rupture. For this purpose a large number of diode lasers are arranged in the bottom tool of a bending machine (a V-shaped die) which heat up the initially flat sheet metal during the bending process what is performed by pressing it into the die with a knife shaped upper tool where due to the laser heating the material is softened and thus cracks are avoided. For the technical realization of the new process of laser assisted die bending, modules equipped with numerous laser diodes and a total beam power of 2,5 kW are used. The light emitted by these modules enters a tool with a length of 15cm and is deflected towards the workpiece. By using ten of these modules with adjacent dies and by integrating those in a bending press a bending edge of sheet metals with a length of 1500mm can be realized. Such a bending press with laser assistance also needs energization with a power of practically 50kW, a respective water flow, a heat exchanger system and also a control for all functions of this system. Special measures have also been developed to avoid radiating of those tools that are not covered by a workpiece in the case of bending edges shorter than the full length of the bending tools whereas individual short circuiting of diode modules can be performed. Specific measures to ensure a safe operation without any harm to the operational person have been realized. Exploitation of the bending process has been carried out for titanium, where material thicknesses up to 3mm have been bent successfully.

PROCEEDINGS ARTICLE | March 22, 2013

Experimental and theoretical study of gain switched Yb-doped fiber laser

Proc. SPIE. 8601, Fiber Lasers X: Technology, Systems, and Applications

KEYWORDS: Data modeling, Resonators, Ions, Laser applications, Reflectivity, Fiber lasers, Laser resonators, Ytterbium, Pulsed laser operation, Systems modeling

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PROCEEDINGS ARTICLE | January 30, 2013

Laser assisted bending based on macro-channel cooled diode lasers

Proc. SPIE. 8677, XIX International Symposium on High-Power Laser Systems and Applications 2012

KEYWORDS: Prisms, Reflection, Reliability, Laser applications, Laser development, Laser beam propagation, Semiconductor lasers, Optical simulations, Optical pumping, Cylindrical lenses

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PROCEEDINGS ARTICLE | January 30, 2013

A simple pulsed laser design for high harmonics generation

Proc. SPIE. 8677, XIX International Symposium on High-Power Laser Systems and Applications 2012

KEYWORDS: Mirrors, Second-harmonic generation, Crystals, Laser development, Nd:YAG lasers, Q switches, Modulators, High harmonic generation, Laser crystals, Pulsed laser operation

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PROCEEDINGS ARTICLE | September 30, 2011

SCPEM-based polarization modulation ellipsometry in the NIR

Proc. SPIE. 8169, Optical Fabrication, Testing, and Metrology IV

KEYWORDS: Near infrared, Ellipsometry, Modulation, Polarization, Calibration, Crystals, Photodiodes, Field programmable gate arrays, Modulators, Analog electronics

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PROCEEDINGS ARTICLE | June 9, 2011

A new material for single crystal modulators: BBO

Proc. SPIE. 8080, Diode-Pumped High Energy and High Power Lasers; ELI: Ultrarelativistic Laser-Matter Interactions and Petawatt Photonics; and HiPER: the European Pathway to Laser Energy

KEYWORDS: Modulation, Polarization, Birefringence, Crystals, Solid state lasers, Q switches, Modulators, Laser crystals, Resistors, Absorption

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PROCEEDINGS ARTICLE | February 17, 2011

Q-switching with single crystal photo-elastic modulators

Proc. SPIE. 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies

KEYWORDS: Modulation, Polarization, Crystals, Laser applications, Q switches, Polarizers, Modulators, Laser resonators, Pulsed laser operation, Q switch crystals

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PROCEEDINGS ARTICLE | November 16, 2010

Hot bending with a fiber coupled solid state laser

Proc. SPIE. 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

KEYWORDS: Prisms, Beam splitters, Polarization, Metals, Solid state lasers, Semiconductor lasers, Collimation, Fiber couplers, Fiber coupled lasers, Temperature metrology

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PROCEEDINGS ARTICLE | May 19, 2010

Gain-switching of a fiber laser: experiment and a simple theoretical model

Proc. SPIE. 7721, Solid State Lasers and Amplifiers IV, and High-Power Lasers

KEYWORDS: Fiber amplifiers, Switches, Cladding, Photons, Ions, Control systems, Fiber lasers, Diodes, Pulsed laser operation, Absorption

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PROCEEDINGS ARTICLE | May 19, 2010

Nd:YAG-laser-Q-switching with a photo-elastic modulator and applications

Proc. SPIE. 7721, Solid State Lasers and Amplifiers IV, and High-Power Lasers

KEYWORDS: Modulation, Polarization, Glasses, Crystals, Q switches, Polarizers, Modulators, Semiconductor lasers, Laser resonators, Pulsed laser operation

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PROCEEDINGS ARTICLE | February 26, 2010

A small and fast SCPEM-based ellipsometer

Proc. SPIE. 7598, Optical Components and Materials VII

KEYWORDS: Modulation, Polarization, Sensors, Glasses, Crystals, Polarizers, Field programmable gate arrays, Modulators, Analog electronics, Optics manufacturing

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PROCEEDINGS ARTICLE | April 18, 2009

Q-switching with a dual mode single crystal photo-elastic modulator

Proc. SPIE. 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

KEYWORDS: Resonators, Polarization, High power lasers, Crystals, Q switches, Polarizers, Modulators, Laser resonators, Laser crystals, Pulsed laser operation

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PROCEEDINGS ARTICLE | April 16, 2008

Q-switching a fiber laser with a dual mode single crystal photo-elastic modulator

Proc. SPIE. 6998, Solid State Lasers and Amplifiers III

KEYWORDS: Modulation, Polarization, Crystals, Q switches, Polarizers, Modulators, Fiber lasers, Laser resonators, Laser crystals, Pulsed laser operation

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PROCEEDINGS ARTICLE | March 5, 2008

A new compact high brilliance diode laser type

Proc. SPIE. 7009, Second International Conference on Advanced Optoelectronics and Lasers

KEYWORDS: Optical filters, Switches, Switching, Polarization, Electrodes, Crystals, Semiconductor lasers, Diodes, Laser crystals, Pulsed laser operation

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PROCEEDINGS ARTICLE | April 26, 2007

New developments in the field of diode lasers

Proc. SPIE. 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

KEYWORDS: Optical filters, Waveguides, Polarization, High power lasers, Laser applications, Solid state lasers, Multiplexing, Semiconductor lasers, Collimation, Diodes

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PROCEEDINGS ARTICLE | April 26, 2007

Q-switching with photo-elastic modulators

Proc. SPIE. 6346, XVI International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

KEYWORDS: Modulation, Polarization, Birefringence, Q switching, Crystals, Q switches, Polarizers, Modulators, Laser resonators, Pulsed laser operation

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PROCEEDINGS ARTICLE | February 20, 2007

A single crystal photo-elastic-modulator

Proc. SPIE. 6469, Optical Components and Materials IV

KEYWORDS: Modulation, Polarization, Birefringence, Electrodes, Glasses, High power lasers, Crystals, Polarizers, Modulators, Resistors

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PROCEEDINGS ARTICLE | February 15, 2006

A compact high brilliance diode laser

Proc. SPIE. 6104, High-Power Diode Laser Technology and Applications IV

KEYWORDS: Optical filters, Switching, Polarization, Crystals, Wave plates, Semiconductor lasers, Diodes, Multiplexers, Signal detection, Pulsed laser operation

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PROCEEDINGS ARTICLE | March 23, 2005

Realization of time-multiplexing for high-power diode lasers

Proc. SPIE. 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

KEYWORDS: Optical filters, Polarization, Electrodes, High power lasers, Crystals, Multiplexing, Semiconductor lasers, Diodes, Multiplexers, Pulsed laser operation

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Showing 5 of 19 publications

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