• JLA Vol:18 Iss:2 (Laser ablation of silicon wafer with a water microdrop)


    Authors:
    Kouki Shimizu
    Kunimitsu Takahashi
    Photonics and Materials Research Department, Institute of Research and Innovation, 1201 Takada, Kashiwa, Chiba 277-0861, Japan

    Hiroshi Morikazu
    Nobumori Ogoshi
    Koichi Takeyama
    DISCO Corporation, 13-11 Omori-Kita 2-chome, Ota-ku, Tokyo 143-8580, Japan

    Yoji Wakayama
    LINTEC Corporation, 5-14-42 Nishiki-cho, Warabi-shi, Saitama 335-0005, Japan

    Tetsuro Obara
    Saitama University, 255-Shimo-okubo, Sakura-ku, Saitama-shi, Saitama 338-8570, Japan


    We have developed a new laser ablation process using a water-microdrop with a diameter of 70 μm....

    $25.00

  • JLA Vol:23 Iss:3 (Parameter optimization of a laser-induced fluorescence system for <em>in vivo</em> screening of oral cancer)


    Authors:
    V. K. Unnikrishnan
    Rajesh Nayak
    Rodney Bernard
    Centre for Atomic and Molecular Physics, Manipal University, Manipal, 576 104, India

    K. Jeena Priya
    Department of Oral Medicine and Radiology, MCODS Mangalore, Manipal University, Manipal, 575 001, India

    Ajeetkumar Patil
    Centre for Atomic and Molecular Physics, Manipal University, Manipal, 576 104 India

    J. Ebenezer
    PG & Research Department of Physics, Jamal Mohamed College, Tiruchinapalli, Manipal, 620 020, India

    Keerthilatha M. Pai
    Department of Oral Medicine and Radiology, MCODS Manipal, Manipal University, Manipal,576 104 India<...>

    $25.00

  • JLA Vol:6 Iss:1 (Measurement of temperature and absorptance for laser processing applications)


    Authors:
    S. Ramanathan
    M. F. Modest
    Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802, U.S.A.


    The use of CO2 lasers has been successfully demonstrated for several manufacturing processes such as cutting, drilling, scribing, etc., of a wide range of materials. The absorptance of a material at the laser wavelength and at the material removal temperature substantially affect the efficiency of the laser machining process. Some materials have absorption bands in the mid&hyphen;infrared and the absorptance changes drastically with temperature at the CO2 laser wavelength of 10.6 μm. Additionally, the absor...

    $25.00

  • JLA Vol:16 Iss:2 (High-power CO<sub>2</sub> laser design &ldquo;from resonator end mirror to cutting lens focal point&rdquo;)


    Authors:
    David Toebaert
    HACO NV, Oekenestraat 120, 8800 Rumbeke, Belgium

    Wybo Wagenaar
    Infinite Simulation Systems BV, Lange Bunder 3, 4854 MB Bavel, Netherlands


    An algorithm is derived that allows calculating all optical parameters relevant to the design of a high-power CO2 laser, taking into account the practical needs of a flying-optics type of laser cutting machine. The novelty of the approach taken is that the resonator and the beam delivery optics are treated simultaneously, which allows for greater flexibility in design. To begin with, the often-used optical configuration of a stable resonator combined with a beam expander for collimation is mod...

    $25.00

  • JLA Vol:20 Iss:3 (Investigation of femtosecond laser induced thermal ablation of polyethylene)


    Authors:
    Andrew J. Lee
    Judith M. Dawes
    Michael J. Withford
    Centre of Ultrahigh-bandwidth Devices for Optical Systems (CUDOS) and MQPhotonics Research Centre, Department of Physics, Macquarie University, 2109 NSW, Australia


    We present a novel method for profiling high aspect ratio and undercut laser drilled holes using sacrificial layers. This profiling method is used to compare and contrast laser ablation of polyethylene films under exposure to ultraviolet (266 nm) and near-infrared (800 nm) radiation from an ultrafast, femtosecond laser. We find that ultraviolet femtosecond pulsed laser processing of this polymer exhibits similar characteristics to...

    $25.00

  • JLA Vol:8 Iss:2 (Laser materials processing at Sandia National Laboratories)


    Authors:
    James L. Jellison
    Michael J. Cieslak
    Sandia National Laboratories, Albuquerque, NM 87185, U.S.A.


    This paper describes the laser materials processing capabilities at Sandia National Laboratories. Some of the advances in the understanding of various aspects of laser materials processing which have been made by the laser materials processing team at Sandia are discussed.

    $25.00

  • JLA Vol:3 Iss:1 (Nursing Perspective: Clinical Laser Safety Issues Survey)


    Authors:
    Penny J. Smalley
    Laser Resources & Consulting Services, Chicago, Illinois


    $25.00

  • JLA Vol:14 Iss:3 (Pulsed laser driven deposition of spattered molten particles and its application to the manufacturing of wear-resistant coatings)


    Authors:
    Toru Nagai
    Takashi Inoue
    Applied Laser Engineering Research Institute, 2085-16 Uenoyama, Fukasawa, Nagaoka 940-2135, Japan

    Hirofumi Shimura
    Mechanical Engineering Laboratory, Agency of Industrial Science and Technology, 1-2 Namiki, Tsukuba 305-8564, Japan


    In this article, we report on a new process for manufacturing metal coatings with submillimeter thickness by pulsed laser driven deposition of molten metal particles. The process of “laser spattering of molten particles” using a high pulse-energy laser is considered to be effective compared to the conventional physical vapor process based on vaporized ultrafine particle generati...

    $25.00

  • JLA Vol:18 Iss:4 (Influence of joint geometry and fit-up gaps on hybrid laser-metal active gas (MAG) welding)


    Authors:
    Y. Yao
    Jilin University and China FAW Group Corporation R&D Center, No. 35 Chuangye Street, 130011 Changchun, China

    M. Wouters
    Luleå University of Technology, Division of Manufacturing Systems Engineering, S-971 87, Luleå, Sweden

    J. Powell
    Luleå University of Technology, Division of Manufacturing Systems Engineering, S-971 87, Luleå, Sweden and Laser Expertise Ltd., Acorn Park Ind. Estate, Harrimans Lane, Nottingham NG7 2TR, United Kingdom

    K. Nilsson
    A. F. H. Kaplan
    Luleå University of Technology, Division of Manufacturing Systems Engineering, S-971 87, Luleå, Sweden

    ...

    $25.00

  • JLA Vol:24 Iss:3 (2D longitudinal modeling of heat transfer and fluid flow during multilayered direct laser metal deposition process)


    Authors:
    Simon Morville
    Muriel Carin
    LIMATB, Universite´ de Bretagne-Sud/UEB, Centre de recherche Ch. Huygens, Rue de Saint Maude´, BP 92116, 56321 Lorient cedex, France

    Patrice Peyre
    Myriam Gharbi
    PIMM, UMR 8006 CNRS-Arts et Me´tiers Paris Tech, 151 Boulevard de l’Hoˆpital, 75013 Paris, France

    Denis Carron
    Philippe Le Masson
    LIMATB, Universite´ de Bretagne-Sud/UEB, Centre de recherche Ch. Huygens, Rue de Saint Maude´, BP 92116, 56321 Lorient cedex, France

    Re´my Fabbro
    PIMM, UMR 8006 CNRS-Arts et Me´tiers Paris Tech, 151 Boulevard de l’Ho&ci...

    $25.00

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