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  • ICALEO 2011 Paper #M1208 (Sinusoidal Surface Texturing Using a Nanosecond MOPA Pulsed Fiber Laser)

    Sinusoidal Surface Texturing Using a Nanosecond MOPA Pulsed Fiber Laser
    Authors:
    Whitney P. Davis, Southern Methodist University; Dallas TX USA
    Sami T. Hendow, Multiwave Photonics; Maia Portugal
    Radovan Kovacevic, Southern Methodist University; Dallas TX USA
    Presented at ICALEO 2011

    Sinusoidal surface texturing and roughness modification generated on aluminum and stainless steel alloy substrates using a diode-pumped pulsed fiber laser are investigated as a pre-processing step for improved adhesive bonding. Different processing parameters are modified in order to assess their effect on the resulting surface topology; a power of 9.5 W, pulse width 200 ns, beam diameter s...

    $28.00

  • ICALEO 2011 Paper #M1206 (Micro-sculpting of Diffractive Scales on Metal Surfaces for Optical Position Encoders, the 'YAGboss' Process)

    Micro-sculpting of Diffractive Scales on Metal Surfaces for Optical Position Encoders, the 'YAGboss' Process
    Authors:
    S. Giet, Heriot-Watt University; Edinburgh Scotland
    M. Ardron, Renishaw plc; Edinburgh
    F. Albri, Heriot Watt University; Edinburgh
    M.D. Kidd, Renishaw plc; Edinburgh
    R.R.J. Maier, Heriot Watt University; Edinburgh
    J.D. Shephard, Heriot Watt University; Edinburgh
    N.J. Weston, Renishaw plc; Edinburgh
    D.P. Hand, Heriot Watt University; Edinburgh
    Presented at ICALEO 2011

    YAGboss, a process named after the UV YAG laser used to emboss fine features on metals, relies on a combination of su...

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  • ICALEO 2011 Paper #M1205 (Integration of a Picosecond Laser System Into a Machining Centre)

    Integration of a Picosecond Laser System Into a Machining Centre
    Authors:
    Volker Schulze, Karlsruhe Institute of Technology (KIT); Karlsruhe Germany
    Mateusz Chlipala, Karlsruhe Institute of Technology (KIT); Karlsruhe Germany
    Ruediger Pabst, Karlsruhe Institute of Technology (KIT); Karlsruhe Germany
    Presented at ICALEO 2011

    The application of fuel saving technologies like fuel-efficient engine oil or the implementation of an automated start-stop system into the engine management leads to increased loads on power train bearings. To improve the durability of these parts, the friction surfaces need to be modified. The optimization of already existing parts can be done by ...

    $28.00

  • ICALEO 2011 Paper #M1204 (Generic Parameters Governing the Wettability Characteristics of Laser-Modified Nylon 6,6)

    Generic Parameters Governing the Wettability Characteristics of Laser-Modified Nylon 6,6
    Authors:
    David Waugh, University of Lincoln; Lincoln Great Britain
    Jonathan Lawrence, University of Lincoln; Lincoln Great Britain
    Presented at ICALEO 2011

    Wettability is an interesting subject which spans any discipline that takes into account any form of adhesion. As such, it is imperative to identify generic parameters that govern the wetting nature of materials. This paper details the use of CO2 and KrF excimer lasers to modify the surface of nylon 6,6 in order to modulate the wettability characteristics. White light interferometery allowed one to establish that the surface roughness (Ra) w...

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  • ICALEO 2011 Paper #M1203 (Functionalization of Sapphire Surfaces Using Fs-Laser Radiation and Selective Etching)

    Functionalization of Sapphire Surfaces Using Fs-Laser Radiation and Selective Etching
    Authors:
    Maren Hoerstmann-Jungemann, Chair for Laser Technology LLT; Aachen Germany
    Dominik Dobrzanski, Chair for Laser Technology LLT; Aachen Germany
    Dagmar Schaefer, Chair for Laser Technology LLT; Aachen Germany
    Ingomar Kelbassa, Chair for Laser Technology LLT; Aachen Germany
    Presented at ICALEO 2011

    Micro- and nano-structuring of sapphire and glasses is an important market e.g. for microfluidic devices and sensors that combine optical and microfluidic features. In microfluidic applications the surface properties of the material become more important since the function...

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  • ICALEO 2011 Paper #M1201 (Applications Of Surface Structuring with Lasers)

    Applications Of Surface Structuring with Lasers
    Authors:
    Shan-Ting Hsu, Columbia University; -
    Hongliang Wang, Columbia University; -
    Gen Satoh, Columbia University; -
    Y. Lawrence Yao, Columbia University; New York NY USA
    Presented at ICALEO 2011

    Surface properties are significant in determining the applications of a material, and the modifications of surface properties have been drawing wide attention. The properties attracting the most attention include hydrophilicity, microhardness, optical properties, and tribological properties. To modify these surface characteristics, numerous methods have been developed and investigated over the years; however,...

    $28.00

  • ICALEO 2011 Paper #M1107 (Trends and Advances in UV-Laser Microprocessing)

    Trends and Advances in UV-Laser Microprocessing
    Authors:
    Ralph Delmdahl, Coherent GmbH; Goettingen Germany
    Presented at ICALEO 2011

    Lasers with ultraviolet (UV) output offer unique benefits for processing a wide range of materials. In particular, the short wavelength, high energy UV photons experience less diffraction than longer visible or infrared wavelengths, which enables materials processing at higher spatial resolution. In addition, UV-laser wavelengths interact primarily by non-thermal means, thus minimizing the heat affected zone during manufacturing.
    UV-excimer lasers deliver energies scalable up to 2J/pulse and output powers above one kilowatt. Thus, they are the key to fast and effe...

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  • ICALEO 2011 Paper #M1106 (355Nm DPSS UV Laser Micromachining of Single-Crystal Silicon)

    355Nm DPSS UV Laser Micromachining of Single-Crystal Silicon
    Authors:
    Huan Yang, Wuhan National Laboratory for Optoelectronics; Wuhan Peoples Republic of China
    Jun Duan, Wuhan National Laboratory for Optoelectronics; Wuhan Peoples Republic of China
    Xiaoyan Zeng, Wuhan National Laboratory for Optoelectronics; Wuhan Peoples Republic of China
    Yu Cao, Wuhan National Laboratory for Optoelectronics; -
    Presented at ICALEO 2011

    In recent years, laser micromachining of semiconductor materials such as silicon and sapphire has attracted more and more attention. High power Diode Pumped Solid State (DPSS) UV lasers have been gained wider application in microelectronic...

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  • ICALEO 2011 Paper #M1103 (Laser Dressing of Metal Bonded Diamond Blades for Cutting of Hard Brittle Materials)

    Laser Dressing of Metal Bonded Diamond Blades for Cutting of Hard Brittle Materials
    Authors:
    Philipp Von Witzendorff, Laser Zentrum Hannover e.V.; Hannover Germany
    Anas Moalem, Laser Zentrum Hannover e.V.; Hannover Germany
    Rainer Kling, Laser Zentrum Hannover e.V.; Hannover Germany
    Presented at ICALEO 2011

    In this study we investigate laser dressing of metal bonded diamond blades by means of laser pulses with different pulse durations and wavelengths. Conventional dressing suffers from excessive blade wear whereas laser dressing enables precise removal of the metal bond to generate the required chip space in terms of protruding diamond grains. The challenge for process...

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  • ICALEO 2011 Paper #M1102 (Picosecond Laser Ablation of Carbon Fiber Reinforced Plastics at Different Wavelengths)

    Picosecond Laser Ablation of Carbon Fiber Reinforced Plastics at Different Wavelengths
    Authors:
    Alexander Wolynski, Photonik-Zentrum Kaiserslautern (PZKL); Kaiserslautern Germany
    Thomas Herrmann, Photonik-Zentrum Kaiserslautern (PZKL); Kaiserslautern Germany
    Michael Schmidt, Lehrstuhl fur Photonische Technologien (LPT); Universität Erlangen Germany
    Johannes L'Huillier, Photonik-Zentrum Kaiserslautern (PZKL); Kaiserslautern Germany
    Presented at ICALEO 2011

    Carbon fibre reinforced plastics (CFRP) offer outstanding mechanical properties at extraordinarily low weight for the optimization of structural parts in aircraft and increasingly in automotive industrie...

    $28.00

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