• ICALEO 2008 Paper #203 (Reliable Cooling of High-power Laser Diode Arrays)

    Reliable Cooling of High-power Laser Diode Arrays
    Authors:
    Ryan Feeler, Northrop Grumman / Cutting Edge Optronics; St. Charles MO USA
    Ed Stephens, Northrop Grumman / Cutting Edge Optronics; St. Charles MO USA
    Greg Kemner, Northrop Grumman / Cutting Edge Optronics; St. Charles MO USA
    Jay Doster, Northrop Grumman Cutting Edge Optronics; St. Charles MO USA
    Jeremy Junghans, Northrop Grumman / Cutting Edge Optronics; St. Charles MO USA
    Presented at ICALEO 2008

    Northrop Grumman / Cutting Edge Optronics has developed a line of microchannel-cooled laser diode arrays in which the coolant is electrically isolated from the current path. As a result, the...

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  • ICALEO 2008 Paper #204 (High Power Fiber-based Green Laser with Diffraction-limited Output Beam)

    High Power Fiber-based Green Laser with Diffraction-limited Output Beam
    Authors:
    Dan Hu, Aculight Corporation; Bothell WA USA
    Diane Smith, Aculight Corporation; Bothell WA USA
    Eric Eisenberg, Aculight Corporation; Bothell WA USA
    Roy Mead, Aculight Corporation; Bothell WA USA
    Eric Honea, Aculight Corporation; Bothell WA USA
    Presented at ICALEO 2008

    A high power, narrow-linewidth, polarized and diffraction-limited green laser has been made from frequency converting a high power IR fiber laser from 1064 nm into 532 nm. The IR fiber laser is based on a 10 MHz 5ns master oscillator and power amplified to reliably produce 150 Watt output power with ...

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  • ICALEO 2008 Paper #205 (System Integration of Fiber and Diode Lasers)

    System Integration of Fiber and Diode Lasers
    Authors:
    Tim Lauterborn, Fraunhofer CLT; Plymouth MI USA
    Jens Peter Steinbrecher, Fraunhofer CLT; Plymouth MI USA
    Stefan Heinemann, Fraunhofer CLT; Plymouth MI USA
    Presented at ICALEO 2008

    For reasons such as high beam quality and stability fiber laser systems have become increasingly more attractive for industrial applications. Fiber lasers typically employ diode lasers as a pump energy source and can comprise several individual stages. For applications not requiring the high beam quality or short pulses that can be generated by fiber lasers optically combined diode laser systems can be used. We demonstrate a cost-effective...

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  • ICALEO 2008 Paper #206 (The Relevance of Brightness for High Power Laser Cutting and Welding)

    The Relevance of Brightness for High Power Laser Cutting and Welding
    Authors:
    Dirk Petring, Fraunhofer ILT; Aachen Germany
    Frank Schneider, Fraunhofer ILT; Aachen Germany
    Norbert Wolf, Fraunhofer ILT; Aachen Germany
    Vahid Nazery, Fraunhofer ILT; Aachen Germany
    Presented at ICALEO 2008

    Is there an optimum brightness regime for macro laser processing of materials? Does increased brightness always improve productivity? These questions have been vigorously discussed since lasers offering beam properties near to the theoretical diffraction limit in the multi-kW range have become available. As a contribution to this debate this paper begins by describing the bri...

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  • ICALEO 2008 Paper #207 (Manufacturing Engineering: Practical Laser Safety for Industrial Robots and High Powered Lasers)

    Manufacturing Engineering: Practical Laser Safety for Industrial Robots and High Powered Lasers
    Authors:
    Thomas Lieb, L*A*I International; Elk Grove CA USA
    Presented at ICALEO 2008

    Whether in the lab or the manufacturing floor there are several hazards associated with laser end-effectors which are manipulated by robots (5-axis motion systems). Some of these hazards, are, of course more obvious. But there are also risks which may be more subtle, yet not unheard of. Robot software, although improving, is still subject to going berserk. Containment systems, unless properly designed, can exacerbate as many problems as they are intended to mitigate. Recent use of high powered Fiber Lasers...

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  • ICALEO 2008 Paper #208 (A Novel Active Laser Safety Shield)

    A Novel Active Laser Safety Shield
    Authors:
    Stefan Kuehn, Fraunhofer IWS Dresden; Dresden Germany
    Jan Hannweber, Fraunhofer IWS Dresden; Dresden Germany
    Berndt Brenner, Fraunhofer IWS Dresden; Dresden Germany
    Eckhard Beyer, Fraunhofer IWS Dresden; Dresden Germany
    Presented at ICALEO 2008

    New high power lasers with excellent beam parameter products like Fibre- and Disk lasers offer not only new possibilities with material processing. They make also high demands on laser safety. Conventional laser protection systems are passive systems made of massive shields or housings which resist the direct or indirect laser radiation for a specified time. The operator h...

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  • ICALEO 2008 Paper #209 (High Brightness Laser Beam Delivery Systems)

    High Brightness Laser Beam Delivery Systems
    Authors:
    Bjoern Wedel, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
    Gunnar Koehler, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
    Roman Niedrig, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
    Martin Daniels, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
    Presented at ICALEO 2008

    TBA

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  • ICALEO 2008 Paper #2101 (Production of Low-friction Coatings by Laser Cladding)

    Production of Low-friction Coatings by Laser Cladding
    Authors:
    M. Rombouts, Vito; Mol Belgium
    A. Vanhulsel, Vito; Mol Belgium
    A. Komp, Freudenberg Forschungsdienste Kg; Weinheim Germany
    J. Gedopt, Vito; Mol Belgium
    W. Engelen, Vito; Mol Belgium
    R. Persoons, Vito; Mol Belgium
    Presented at ICALEO 2008

    Elastomers are characterized by a high dry sliding friction, which forces the use of lubrication in dynamic sealing and sliding systems. An important driving factor for new developments in the field of surface treatment are environmental considerations concerning the effects of grease and lubricants. The subject of this study is the p...

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  • ICALEO 2008 Paper #2103 (Modelling of Residual Stress Generation in the Laser Cladding of Extended Areas)

    Modelling of Residual Stress Generation in the Laser Cladding of Extended Areas
    Authors:
    A. Suárez, Universidade Da Coruna; Ferrol - a Coruna Spain
    A. Yáñez, Universidade da Coruna; Ferrol Spain
    M.J. Tobar, Universidade Da Coruna; Ferrol Spain
    Presented at ICALEO 2008

    In the development of protective alloy layers by laser cladding residual stresses can lead to final cracking of the deposited coating and a certain mechanical deformation of the processed part. These stresses are of thermal nature and result from the very high thermal gradients and solidification rates associated to the laser heat treatments. A numerical model based on a thermo-mechanical finite elemen...

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  • ICALEO 2008 Paper #2104 (Investigation of Out-of-Position, Wire-based Cladding)

    Investigation of Out-of-Position, Wire-based Cladding
    Authors:
    Edward W. Reutzel, ARL, The Penn State University; State College PA USA
    Stephen W. Brown, Arl Penn State; State College PA USA
    Presented at ICALEO 2008

    Costs to repair damaged, worn, or corroded metal components, such as valves and other cylindrical bodies, may be reduced if the repairs are performed in the field. In many cases, clad repairs must be realized in non-standard positions and in tight quarters. Additionally, in many cases the repair cannot utilize a powder-based clad process due to fear of contamination of adjacent components. Experiments have been conducted investigating the effects of various process pa...

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