ICALEO 2011 Paper #204 (Novel Monitoring System for Spatially Resolved Topographical Measurement of Laser-Based Processes)

Novel Monitoring System for Spatially Resolved Topographical Measurement of Laser-Based Processes
Authors:
Peter Berger, Institut fuer Strahlwerkzeuge (IFSW); Stuttgart Germany
Jan-Philipp Weberpals, Institut fuer Strahlwerkzeuge (IFSW); Stuttgart Germany
Thomas Graf, Institut fuer Strahlwerkzeuge (IFSW); Stuttgart
Johannes Trein, Silicon Software GmbH; Mannheim Germany
Holger Singpiel, Silicon Software GmbH; Mannheim Germany
Presented at ICALEO 2011

Particularly the automation and industrialization of thermal material processing makes high demands on monitoring and controlling the resulting quality. Indeed, current laser systems with strong ...

ICALEO 2011 Paper #203 (Closed Loop Control of Laser Welding Using an Optical Spectroscopic Sensor for Nd:YAG and CO2 Lasers)

Closed Loop Control of Laser Welding Using an Optical Spectroscopic Sensor for Nd:YAG and CO2 Lasers
Authors:
Ali Riza Konuk, University of Twente; Enschede Netherlands
Ronald Aarts, University of Twente; Enschede Netherlands
Bert Huis in t Veld, University of Twente; Enchede Netherlands
Teresa Sibillano, CNR-IFN UOS Bari; Enschede Italy
Domenico Rizzi, CNR-IFN UOS Bari; Bari Italy
Antonio Ancona, CNR-IFN UOS Bari; Bari Italy
Presented at ICALEO 2011

Recent developments in laser joining show the applicability of spectral analysis of the plasma plume emission to monitor and control the quality of weld. The analysis of the comple...

ICALEO 2011 Paper #202 (Camera-Based Laser Beam Welding Sensor in the Near Infrared Spectral Range)

Camera-Based Laser Beam Welding Sensor in the Near Infrared Spectral Range
Authors:
Holger Braun, TRUMPF Werkzeugmaschinen GmbH + Co. KG; Ditzingen Germany
Friedhelm Dorsch, TRUMPF Werkzeugmaschinen GmbH + Co. KG; Ditzingen Germany
Steffen Kessler, TRUMPF Werkzeugmaschinen GmbH + Co. KG; Ditzingen Germany
Dieter Pfitzner, TRUMPF Werkzeugmaschinen GmbH + Co. KG; Ditzingen Germany
Volker Rominger, TRUMPF Laser- Und Systemtechnik GmbH; Ditzingen Germany
Presented at ICALEO 2011

We demonstrate a novel process sensor system for use in laser beam welding that uses image processing of NIR images. Additionally to 2-dimensional process monitoring in th...

ICALEO 2011 Paper #1809 (An Efficient Method for Enhancing the Filling Factor of the Aperture for Coherent-Beaming-Combining (CBC) using Thin-Film Coated Glass)

An Efficient Method for Enhancing the Filling Factor of the Aperture for Coherent-Beaming-Combining (CBC) using Thin-Film Coated Glass
Authors:
Si-si Zhao, Beijing University of Technology; Beijing Peoples Republic of China
Zheng-yu Ye, Beijing University of Technology; Beijing Peoples Republic of China
Zhi-yong Wang, Beijing University of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2011

Aperture technology, which influences the combining efficiency, is the key factor for Coherent-Beam-Combining (CBC). By using beam combiner with high performances, coherent combining of fiber lasers can provide the chance to increase the output intensity more effi...

ICALEO 2011 Paper #1808 (Wavelength Dependency in High Power Laser Cutting & Welding)

Wavelength Dependency in High Power Laser Cutting & Welding
Authors:
David Havrilla, TRUMPF, Inc.; Plymouth MI USA
Stephan Ziermann, TRUMPF, Inc.; Plymouth MI USA
Marco Holzer, TRUMPF Laser and Systemtechnik GmbH; -
Presented at ICALEO 2011

Laser cutting and welding have been around for more than 30 years. Within those three decades there has never been a greater variety of high power laser types and wavelengths to choose from than there is today. There are many considerations when choosing the right laser for any given application capital investment, cost of ownership, footprint, serviceability, along with a myriad of other commercial & economic considerations....

ICALEO 2011 Paper #1807 (High Power Disk Lasers - Advances & Applications)

High Power Disk Lasers – Advances & Applications
Authors:
David Havrilla, TRUMPF, Inc.; Plymouth MI USA
Tracey Ryba, TRUMPF, Inc.; Plymouth MI USA
Marco Holzer, TRUMPF Laser and Systems GmbH; Ditzingen Germany
Presented at ICALEO 2011

Though the genesis of the disk laser concept dates to the early 90’s, the disk laser continues to demonstrate the flexibility and the certain future of a breakthrough technology. On-going increases in power per disk, and improvements in beam quality and efficiency continue to validate the genius of the disk laser concept. As of today, the disk principle has not reached any fundamental limits regarding output power per disk or beam q...

ICALEO 2011 Paper #1805 (Thermal Lensing Measurement of a Thermal Lens Compensation High Power Laser Objective)

Thermal Lensing Measurement of a Thermal Lens Compensation High Power Laser Objective
Authors:
Michael Scaggs, Neoteric Concepts, LLC; Weston FL USA
Gilbert Haas, Haas Laser Technologies, Inc.; Flanders NJ USA
Presented at ICALEO 2011

An effort was under taken to mitigate thermal lensing and have an easy and compact means of monitoring thermal lensing in a high power laser system. Utilizing the negative temperature coefficient refractive index of CaF2 with the nearly opposing positive temperature coefficient refractive index of SiO2, a multi-element focusing objective was fabricated to reduce the amount of thermal lensing experienced with a multi-kilowatt, cw fiber laser. In addi...

ICALEO 2011 Paper #1803 (Thermal Management to Reduce Focus Shift Using ZnS Ms Optics)

Thermal Management to Reduce Focus Shift Using ZnS Ms Optics
Authors:
Stephen Rummel, II-VI Infrared; Saxonburg PA USA
Gary Herrit, II-Vi Infrared; Saxonburg PA USA
Alan Hedges, II-Vi Infrared; Saxonburg PA USA
Fred Kropf, II-Vi Infrared; Saxonburg PA USA
Presented at ICALEO 2011

Focus shift or thermal lensing is one of the key factors when determining the quality of a cutting or welding head. High power CO2 laser industry cutting heads evolved over time to produce focused beams with a minimum of thermal lensing. One of the key lens parameters that determine thermal lensing produced by a focusing lens is the lens materials thermal conductivity. CO2 OEM sys...

ICALEO 2011 Paper #1802 (Reference Process for Determination of Thermal Focus Shift)

Reference Process for Determination of Thermal Focus Shift
Authors:
Axel Hess, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
Rudolf Weber, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
Thomas Graf, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
Marcel Schaefer, Manz AG; Stuttgart Germany
Christiane Thiel, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
Presented at ICALEO 2011

High average laser power very often causes thermal beam distortion inside the transmitted optical components. This effect is very pronounced in contaminated optics. It results in a significant decrease of the beam quality and a decrease o...

ICALEO 2011 Paper #1710 (COAXID Omni-Directional Inner Diameter Laser Cladding Optic)

COAXID Omni-Directional Inner Diameter Laser Cladding Optic
Authors:
Frank Kubisch, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
Steffen Nowotny, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
Christoph Leyens, University of Technology; Dresden
Eckhard Beyer, University of Technology; -
Anja Techel, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
Presented at ICALEO 2011

Laser ID materials deposition is applied for inner surface coatings of abrasively loaded tools, the generative fabrication of inner 3D structures of aero engines and gas turbines as well as the repair o...