• ICALEO 2005 Paper #403 (High-Efficiency, High Power Laser Diodes)

    High-Efficiency, High Power Laser Diodes
    Authors:
    Matthew Peters, JDS Uniphase; San Jose CA USA
    Erik Zucker, JDS Uniphase; San Jose CA USA
    Victor Rossin, JDS Uniphase; San Jose CA USA
    Bruno Acklin, JDS Uniphase; San Jose CA USA
    Presented at ICALEO 2005

    Laser diodes and bars with high efficiency and power are used for a wide variety of applications including direct material processing and pumping fiber and solid state lasers. Efficient electro-optical. conversion is critical to achieve high output power as it allows to reduce dissipated heat and cooling load. This work presents progress achieved by JDSU in the DARPA Super High Efficiency Diode Sources (SHED...

    $28.00

  • ICALEO 2005 Paper #404 (High Power, High Efficiency Vertical Cavity Surface Emitting Laser for Diode Pumping)

    High Power, High Efficiency Vertical Cavity Surface Emitting Laser for Diode Pumping
    Authors:
    Chuni Ghosh, Princeton Optronics; Mercerville NJ USA
    Jean-F Seurin, Princeton Optronics; Mercerville NJ USA
    Art D?Asaro, Princeton Optronics; Mercerville NJ USA
    Delai Zhou, Princeton Optronics; Mercerville NJ USA
    Jongwoo Kim, Princeton Optronics; Mercerville NJ USA
    James Wynn, Princeton Optronics; Mercerville NJ USA
    John Boardman, Princeton Optronics; Mercerville NJ USA
    Presented at ICALEO 2005

    Princeton Optronics is a participant of the SHEDS program. In this program, we are developing high power, high efficiency VCSEL devic...

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  • ICALEO 2005 Paper #405 (High Power GaInAs VCSEL Arrays)

    High Power GaInAs VCSEL Arrays
    Authors:
    J. Watson, Novalux, Inc.; Sunnyvale CA USA
    R. Nabiev, Novalux, Inc.; Sunnyvale CA USA
    Aram Mooradian, Novalux, Inc.; Sunyvale CA USA
    M. Jansen, Novalux, Inc.; Sunnyvale CA USA
    G. Carey, Novalux, Inc.; Sunnyvale CA USA
    S. Hallstein, Novalux, Inc.; Sunnyvale CA USA
    B. Cantos, Novalux, Inc.; Sunnyvale CA USA
    W. Hitchens, Novalux, Inc.; Sunnyvale CA USA
    F. Fang, Novalux, Inc.; Sunnyvale CA USA
    G. Green, Novalux, Inc.; Sunnyvale CA USA
    K. Scholz, Novalux, Inc.; Sunnyvale CA USA
    R. Dato, Novalux, Inc.; Sunnyvale CA USA
    Presented ...

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  • ICALEO 2005 Paper #406 (Large-area, Semiconductor Transverse Bragg Resonance (TBR) Lasers for Efficient, High Power Operation)

    Large-area, Semiconductor Transverse Bragg Resonance (TBR) Lasers for Efficient, High Power Operation
    Authors:
    John M. Choi, Caltech; Pasadena CA USA
    Lin Zhu, Caltech; Pasadena CA USA
    William M.J. Green, Caltech; Pasadena CA USA
    Guy DeRose, Caltech; Pasadena CA USA
    Amnon Yariv, Caltech; Pasadena CA USA
    Presented at ICALEO 2005

    By incorporating a transverse Bragg grating into a large-area laser, the optical modes of the laser can be designed to improve the efficiency compared to traditional index-guided lasers. The resulting transverse Bragg resonance (TBR) waveguide can be designed to have a single lateral mode that is distributed throughout t...

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  • ICALEO 2005 Paper #407 (Spectral Stabilization of High Efficiency Diodes and Diode Bars by External Bragg Resonator)

    Spectral Stabilization of High Efficiency Diodes and Diode Bars by External Bragg Resonator
    Authors:
    Leonid Glebov, University of Central Florida College of Optics and Photonics: CREOL and FPCE; Orlando FL USA
    Gerge Venus, College of Optics and Photonics/CREOL, University of Central Florida; Orlando FL USA
    Presented at ICALEO 2005

    The problem of high-power semiconductor lasers sources with stable emission spectra is important for different kinds of applications, specifically for high-efficient solid-state and fiber lasers pumping. Adjustable spectral and angular selectivity combined with low optical losses and high laser damage thresholds of volume Bragg gratings, which are recorde...

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  • ICALEO 2005 Paper #409 (High-Power Diode Laser Array Metrology)

    High-Power Diode Laser Array Metrology
    Authors:
    Chris Cromer, NIST; Boulder CO USA
    Xiaoyu Li, NIST; Boulder CO USA
    Presented at ICALEO 2005

    NIST has been tasked by DARPA to provide wall plug efficiency and spectral measurements of high-power high-efficiency laser diodes and arrays for DARPA?s Super High Efficiency Diode Sources (SHEDS) program. To meet the needs for this project, the Optoelectronics Division has developed a new laboratory at NIST to measure electrical power, optical power, wavelength and line width, and junction temperature for lasers supplied by project participants. We describe a novel flowing-water optical power meter (FWOPM) that we have developed to meet the u...

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  • ICALEO 2005 Paper #503 (Feasibility Investigation of Laser Welding Aluminum Alloy 7075-T6 through the use of a 300 W, Single-Mode, Ytterbium Fiber Optic Laser)

    Feasibility Investigation of Laser Welding Aluminum Alloy 7075-T6 through the use of a 300 W, Single-Mode, Ytterbium Fiber Optic Laser
    Authors:
    Jay Tu, North Carolina State Univ.; Raleigh NC USA
    Alex Paleocrassas, North Carolina State University; Raleigh NC USA
    Presented at ICALEO 2005

    Aluminum alloys are very popular in the industrial world as structural materials, mainly due to their high strength to weight ratio. Unfortunately, due to their material properties, aluminum alloys are some of the hardest metals to be laser welded successfully and very high laser power is usually required. In this study, we explore the capability of using a 300 W fiber laser for high speed aluminum...

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  • ICALEO 2005 Paper #504 (Combining High-Speed Laser Perforation and Cold Roll Forming for the Production of Bio-Medical Micro-Filtration Membranes)

    Combining High-Speed Laser Perforation and Cold Roll Forming for the Production of Bio-Medical Micro-Filtration Membranes
    Authors:
    Klaus Dickmann, Laser Center University of Applied Sciences Muenster (LFM); Steinfurt NRW Germany
    Marc Baumeister, Laser Center University of Applied Sciences Muenster (LFM); Steinfurt Germany
    Tony Hoult, SPI; Southampton England
    Presented at ICALEO 2005

    A novel high speed two-step technique capable of performing large matrices of very small pores in large sheets of thin stainless steel foils has been developed. This process combination is initiated by high-speed �on-the-fly� laser perforation. A 100 Watt fiberlaser is capable of a very...

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  • ICALEO 2005 Paper #506 (Welding with Fibre Lasers from 200 to 17000 W)

    Welding with Fibre Lasers from 200 to 17000 W
    Authors:
    Frank Vollertsen, BIAS Bremer Institut fr angewandte Strahltechnik; Bremen Germany
    Claus Thomy, BIAS Bremer Institut fr angewandte Strahltechnik; Bremen Germany
    Presented at ICALEO 2005

    Latest developments in laser physics have made available high-power fibre lasers with beam powers up to 17 kW and single mode fibre lasers with several 100 W at excellent beam quality. Adding to these properties their high energetic efficiency, their considerable estimated lifetime and their compact size, they might well be considered to be a viable alternative to both conventional lamp- or diode-pumped Nd:YAG- as well as to CO2-Lasers. Howeve...

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  • ICALEO 2005 Paper #507 (The Effect of Laser Beam Quality When Welding with High-Power CW Solid-State Lasers)

    The Effect of Laser Beam Quality When Welding with High-Power CW Solid-State Lasers
    Authors:
    Geert Verhaeghe, The Welding Institute; Cambridge Cambs UK
    Paul Hilton, The Welding Institute; Cambridge Cambs UK
    Presented at ICALEO 2005

    Only 10 years ago, the only commercially available high-power, fibre-delivered laser was the lamp-pumped Nd:YAG rod laser. Today however, diode-pumped Nd:YAG rod lasers, thin-disc Yb:YAG and Yb-fibre lasers are also available for material processing. This means that today's laser user needs to consider parameters such as beam quality and power density (and possibly others), in addition to the actual technology used in generating the laser beam, when se...

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