ICALEO 2005 Paper #601 (New Trends in Laser Sintering: Analysis of the Process and New Applications)
New Trends in Laser Sintering: Analysis of the Process and New Applications
Authors:
Nadine Coulon, Gip Gerailp; Arcueil France
Pascal Aubry, CEA Saclay; Gif-sur-Yvette, Cedex France
Patrick Teulet, Phenix Systems; Clermont-Ferrand France
Presented at ICALEO 2005
In this article, we present new results on laser sintering of metallic or ceramic parts. First, we present the sintering process. The global process is overviewed, from the CAD file to the generation of the laser scanning of the powder.
The principle of the machine is then described. We present the PM250 Phenix Systems machine and show the PM100 too.
The sintering process has a large number of parameters (s...$28.00
ICALEO 2005 Paper #508 (Flexible Yb-doped Fiber Laser Generating a Single-transverse Mode Beam with up to 0.5mJ/11W)
Flexible Yb-doped Fiber Laser Generating a Single-transverse Mode Beam with up to 0.5mJ/11W
Authors:
Tim Lauterborn, Fraunhofer USA, Center for Laser Technology; Plymouth MI USA
Stefan Heinemann, Fraunhofer USA, Center for Laser Technology; Plymouth MI USA
A. Galvanauskas, Fraunhofer USA, Center for Laser Technology; Plymouth MI USA
Presented at ICALEO 2005
We demonstrate a flexible Yb-doped fiber laser that can generate up to 0.5mJ output energy or 11W average output power. The 1064nm single mode beam of a diode laser is amplified by a three stage amplifier. The first two amplification stages consist of single-mode fibers. The third stage uses LMA fiber. The output be...$28.00
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...$28.00
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...$28.00
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...$28.00
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...$28.00
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...$28.00
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...$28.00
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...$28.00
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 ...$28.00
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