• PICALO 2008 Paper #M904 (Laser Device for Elemental Determination in Human Skin)

    Laser Device for Elemental Determination in Human Skin
    Authors:
    Luis Ponce, CICATA-IPN; altamira, tamps Mexico
    Teresa Flores, Cicta-Ipn; Altamira Mexico
    Adian Pena, Cicta-Ipn; Altamira Mexico
    Miguel Arronte, Cicta-Ipn; Altamira Mexico
    Eduardo M. De Posada, Cicta-Ipn; Altamira Mexico
    Presented at PICALO 2008

    The development of laser device for in-situ elemental determination in human skin is presented. By using Er:YAG laser element, emitting 0.5 J energy pulses at 2,94 nm wavelength, its possible to generate an strong emitting plasma. By reading the plasma emission thorough a compact spectrometer, its possible to determine the presence of e...

    $28.00

  • PICALO 2008 Paper #M805 (Design and Experimental Realization of 3D Photonic Components Via Two-Photon Polymerization)

    Design and Experimental Realization of 3D Photonic Components Via Two-Photon Polymerization
    Authors:
    Andre Neumeister, Laser Zentrum Hannover; Hannover Germany
    Andrei Lavrinenko, Technical University of Denmark; Lyngby Denmark
    Johannes Zinn, Laser Zentrum Hannover; Hannover Germany
    Mark Boyle, Laser Zentrum Hannover E.V.; Hannover Germany
    Rainer Kling, Laser Zentrum Hannover E.V.; Hannover Germany
    Reinhold J. Leyrer, Basf Aktiengesellschaft; Ludwigshafen Germany
    Wendel Wohlleben, Basf Aktiengesellschaft; Ludwigshafen Germany
    Roman Kiyan, Laser Zentrum Hannover E. V. ; Hannover Germany
    Presented at PICALO 2008

    $28.00

  • PICALO 2008 Paper #M804 (Fabrication, Characterization and Simulation of Large-scale 3-D Photonic Crystals Using Laser-assisted Fabrication Techniques)

    Fabrication, Characterization and Simulation of Large-scale 3-D Photonic Crystals Using Laser-assisted Fabrication Techniques
    Authors:
    H. Wang, University of Nebraska - Lincoln; Lincoln NE USA
    Yongfeng Lu, University of Nebraska - Lincoln; Lincoln NE USA
    Presented at PICALO 2008

    3-D photonic bandgap (PBG) structures were fabricated by laser-assisted fabrication techniques, including laser-assisted nanoimprinting and laser-assisted chemical vapor deposition (LCVD), based on the self-assembled silica colloidal crystals. The multilayer silica colloidal crystals self-assembled on silicon substrates were formed with isothermal heating evaporation-induced self-assembly. To infiltrate th...

    $28.00

  • PICALO 2008 Paper #M706 (Ultrafast Laser Microprocessing and Microwelding (Invited Paper))

    Ultrafast Laser Microprocessing and Microwelding (Invited Paper)
    Authors:
    Kazuyoshi Itoh, Osaka Uinversity; Suita, Osaka Japan
    Takayuki Tamaki, Nara National College of Technology; Nara Japan
    Presented at PICALO 2008

    When ultrafast laser pulses are focused inside transparent materials such as glass, the optical intensity in the focal area can usually become high enough to initiate the nonlinear optical absorption and then the filamentary propagation of optical pulses. The nonlinear absorption leads to the avalanche ionization process and plasma is generated along the filamentary area. Due to this process, microstructure of the material is modified and usually the refractive index i...

    $28.00

  • PICALO 2008 Paper #M703 (Femtosecond Fabrication of Nonlinear Photonic Crystals)

    Femtosecond Fabrication of Nonlinear Photonic Crystals
    Authors:
    Baohua Jia, Swinburne University of Technology; Melbourne Australia
    Min Gu, Swinburne University of Technology; Hawthorn Australia
    Presented at PICALO 2008

    It has been demonstrated by many researchers that smooth void dots and void channels have been generated efficiently in polymers and glasses by use of a femtosecond laser induced microexplosion method. This method has been used to fabricate three-dimensional (3D) photonic crystals in those media. But the low refractive index media cannot open 3D complete bandgaps. Lithium niobate (LiNbO3 ) has a high refractive index of ~2.2 and a large transparent range of 0.45-5 ...

    $28.00

  • PICALO 2008 Paper #M701 (Multiscale Modeling of Ultrafast Laser-Material Interactions (Invited Paper))

    Multiscale Modeling of Ultrafast Laser-Material Interactions (Invited Paper)
    Authors:
    Hai-Lung Tsai, University of Missouri-Rolla; Rolla MO USA
    Lan Jiang, Beijing Institute of Technology; Beijing Peoples Republic of China
    Presented at PICALO 2008

    This paper reports the overall picture of our ongoing efforts to establish the scientific understanding of ultrafast, non-equilibrium laser-material interactions from nanometer to milimeter and from femtosecond to microsecond through comprehensive, integrated multiscale physico-chemical modeling and experimental verification. Based on the time when collisions govern the evolution of the phenomena, modeling of ultrafast laser-material inter...

    $28.00

  • PICALO 2008 Paper #M604 (Direct Fabrication of Micro Temperature Sensor Arrays by Laser Micro-Cladding Functional Materials on Ceramic Substrates)

    Direct Fabrication of Micro Temperature Sensor Arrays by Laser Micro-Cladding Functional Materials on Ceramic Substrates
    Authors:
    Cai Zhixiang, Wuhan National Laboratory for Optoelectronics; Wuhan Peoples Republic of China
    Li Xiangyou, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology; Wuhan Peoples Republic of China
    Zeng Xiaoyan, Wuhan National Laboratory for Optoelectronics; Wuhan Peoples Republic of China
    Hu Qianwu, Huazhong University of Science and Technology ; Wuhan Peoples Republic of China
    Presented at PICALO 2008

    In this report, laser micro-cladding technology has been used to fabricate the micro temperat...

    $28.00

  • PICALO 2008 Paper #M603 (Laser Direct-Write using Air-Drying Conductive Paste (Invited Paper))

    Laser Direct-Write using Air-Drying Conductive Paste (Invited Paper)
    Authors:
    Daniel Perkins, Texas Christian University; Ft. Worth TX USA
    David Willis, Southern Methodist University; Dallas TX USA
    Jason Stegall, Southern Methodist University; Dallas TX USA
    Presented at PICALO 2008

    Laser direct-write was performed using commercially available silver paste to deposit patterns in an additive manner. The paste was a 60 % colloidal paste of 0.4 1.0 micron silver particles in a binder that dries under ambient conditions. Transfer was performed using a focused laser spot size of 110 micron and a spacer was placed between the paste and acceptor substrates to prevent con...

    $28.00

  • PICALO 2008 Paper #M602 (Picosecond Lasers in Industrial Micromachining Applications (Invited Paper))

    Picosecond Lasers in Industrial Micromachining Applications (Invited Paper)
    Authors:
    Rainer Kling, Laser Zentrum Hannover e.V.; Hannover Germany
    Tobias Eschenberg, Laser Zentrum Hannover E. V. ; Hannover Germany
    Frank Siegel, Laser Zentrum Hannover E. V. ; Hannover Germany
    Ulrich Klug, Laser Zentrum Hannover E. V. ; Hannover Germany
    Andreas Ostendorf, Laser Zentrum Hannover E. V. ; Hannover Germany
    Presented at PICALO 2008

    Picosecond lasers have the potential to combine the high process speed of nanosecond lasers with the excellent machining quality of femtosecond lasers. Recent enhancements of laser manufacturers address two major industrial...

    $28.00

  • PICALO 2008 Paper #M505 (Micro Welding of Thin Foil with an Elliptical Beam of Direct Diode Lasers (Invited Paper))

    Micro Welding of Thin Foil with an Elliptical Beam of Direct Diode Lasers (Invited Paper)
    Authors:
    Nobuyuki Abe, Osaka University; Ibaraki, Osaka Japan
    Yoshinori Funada, Industrial Research Institute of Ishikawa; Kanazawa Japan
    Presented at PICALO 2008

    Diode lasers have a great advantage on energy conversion efficiency compared with other conventional lasers. On the other hand, they have a shortcoming on beam quality, because high power direct diode lasers have an elliptical shape beam with low power density, which is thought to be appried only heat treatment or laser cradding. This report describes that this characteristic of an elliptical beam shape enables good welding feature f...

    $28.00

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