ICALEO 2009 Paper #P4 (Laser-assisted Deposition of Good Carbon - From Diamond Films to Nanotubes (Plenary, 30 minutes))

Laser-assisted Deposition of Good Carbon — From Diamond Films to Nanotubes (Plenary, 30 minutes)
Authors:
Y.S. Zhou, -; -
H. Ling, -; -
Z.Q. Xie, -; -
W. Xiong, -; -
M. Mahjouri-Samani, -; -
Y. Gao, -; -
M. Mitchell, -; -
Yongfeng Lu, University of Nebraska - Lincoln; Lincoln NE USA
Presented at ICALEO 2009

Carbon materials of versatile structures, from diamond, graphite, carbon nanotube to graphene, exhibit distinct properties and find applications in different fields. Laser-assisted deposition methods were developed for growing materials with unparallel advantages, such as selective interaction...

ICALEO 2009 Paper #P165 (The Tribological Applications of WC-Co Electro-Spark Coatings Modified Via Laser Treatment)

The Tribological Applications of WC-Co Electro-Spark Coatings Modified Via Laser Treatment
Authors:
Norbert Radek, Technical University of Kielce; Kielce Poland
Konrad Bartkowiak, Fraunhofer IWS; Dresden Germany
Matthias Luetke, Presenter not author - Technische Universitat Dresden; Dresden Germany
Presented at ICALEO 2009

Electro spark alloying (ESA) technique is a well established method. However, new lasers are becoming available on the market that can make this technique more attractive for various industry applications, e.g.: surface texturing technology has significant advantages for the wear decreasing into sliding friction. The work reported here concentrates o...

ICALEO 2009 Paper #P163 (Femtosecond Laser Materials Processing in the Townes Laser Institute)

Femtosecond Laser Materials Processing in the Townes Laser Institute
Authors:
Mark Ramme, Townes Laser Institute, CREOL, UCF; Orlando FL USA
Jiyeon Choi, Townes Laser Institute, CREOL, UCF; Orlando FL USA
Troy Anderson, Townes Laser Institute, CREOL, UCF; Orlando FL USA
Martin Richardson, Townes Laser Institute, CREOL, UCF; Orlando FL USA
Presented at ICALEO 2009

Femtosecond Laser Materials Processing (FLMP) is an active area of research for its superior processing quality compared to the conventional laser processing with nano- and picosecond pulses. Advancements in femtosecond laser technology including the development of high repetition rate fiber-based...

ICALEO 2009 Paper #P160 (Drilling of Aluminum with a High Power Q-switched 532nm Laser)

Drilling of Aluminum with a High Power Q-switched 532nm Laser
Authors:
Leonard Migliore, Coherent, Inc.; Santa Clara CA USA
George Nazary, Coherent, Inc; Santa Clara CA USA
Presented at ICALEO 2009

Recent advances in the design of gain modules for diode-pumped solid-state lasers have allowed the manufacture of extremely compact high power products. Their high Q-switched pulse energy combined with good mode quality enable highly efficient harmonic conversion, resulting in a product producing several hundred watts of average power at a wavelength of 532nm. Among the applications for which this product is suited is the rapid drilling of high-quality holes in aluminum sheet. This pape...

ICALEO 2009 Paper #P158 (Frequency Doubling (SHG) of a 200 W cw Fiber Laser in Kaliumtitanylphosphat (KTP))

Frequency Doubling (SHG) of a 200 W cw Fiber Laser in Kaliumtitanylphosphat (KTP)
Authors:
Markus Mundus, Laser Center, Muenster University of Applied Sciences; Steinfurt Germany
Jürgen Gröninger, Laser Center, Muenster University of Applied Sciences; Steinfurt Germany
Klaus Dickmann, Laser Center, Muenster University of Applied Sciences; Steinfurt Germany
Presented at ICALEO 2009

Since most metals are high reflective in case of fiber laser wavelengths these materials often can't be processed ideally. Therefore the wavelength of the beam is modified by frequency conversions in order to optimize the interaction of laser and
material. In most state-of-the-art publica...

ICALEO 2009 Paper #P157 (Effect of Joint Gap on Nd: YAG Laser Welded Ti-6Al-4V)

Effect of Joint Gap on Nd: YAG Laser Welded Ti-6Al-4V
Authors:
Xinjin Cao, Institute for Aerospace Research; Montreal QC Canada
G. Debaecker, Ecole Centrale de Nantes; Nantes Canada
E. Poirier, Aerospace Manufacturing Technology Center; Montreal QC Canada
S. Marya, Ecole Centrale de Nantes; - Canada
J. Cuddy, Standard Aero Limited; - Canada
A. Birur, Standard Aero Limited; - Canada
P. Wanjara, Aerospace Manufacturing Technology Center; Montreal QC Canada
Presented at ICALEO 2009

Conventionally, TIG, plasma arc, electron beam and CO2 laser welding have been used to join titanium alloys. To date, little has been reporte...

ICALEO 2009 Paper #P148 (The Effect of the Relative Location Of Laser Beam And Arc In Different Hybrid Welding Processes)

The Effect of the Relative Location Of Laser Beam And Arc In Different Hybrid Welding Processes
Authors:
Paul Kah, Lappeenranta University of Technology; Lappeerenta Finland
Antti Salminen, Lappeenranta University of Technology, Finland; Lappeenranta Finland
Jukka Martikainen, Lappeenranta University of Technology, Finland; Lappeenranta Finland
Presented at ICALEO 2009

Hybrid welding requires that several parameters be adjusted in order to reach high quality of welds. One of the main setup of hybrid welding is the order of the different power sources. The selection partly depends on what kind of results are desired in the weld joints, whether it is gap bridging, penetr...

ICALEO 2009 Paper #P145 (Accelerating the Simulation of Optical Distortion Due To Atmospheric Scintillation Using Multi-Core CPUs, GPUs, Cell Broadband Engine and FPGAs)

Accelerating the Simulation of Optical Distortion Due To Atmospheric Scintillation Using Multi-Core CPUs, GPUs, Cell Broadband Engine and FPGAs
Authors:
Vinay Sriram, Imperial College London; Adelaide Australia
Oskar Mencer, Imperial College London; - Australia
David Kearney, Reconfigurable Computing Laboratory, University of South Australia; - Australia
Presented at ICALEO 2009

Fast simulation of optical distortions due to atmospheric turbulence is important for simulating adaptive optics configurations, evaluating the performance of laser designators and simulating sensor target threat engagements. The current best published algorithm by Harding et. al. requires 600 ...

ICALEO 2009 Paper #P139 (Single Element Imaging Laser Homogenizer)

Single Element Imaging Laser Homogenizer
Authors:
Michael Scaggs, Neoteric Concepts; Weston FL USA
Presented at ICALEO 2009

A field mapped laser beam homogenizer has been designed which has a high degree of homogenization as a single optical element. A traditional imaging laser homogenizer incorporates a Fourier Transform lens requiring therefore a minimum of two (2) optical elements in an ideal case using gray scale lithography fabrication techniques. The single element imaging laser homogenizer is comprised of two lens arrays without a Fourier transform lens and yet yields similar performance to a traditional imaging homogenizer. In large area illumination applications which utilize an exc...

ICALEO 2009 Paper #P137 (Closed Loop Control of Laser Welding Processes Using Cellular Neural Network Cameras - Experimental Results)

Closed Loop Control of Laser Welding Processes Using Cellular Neural Network Cameras - Experimental Results
Authors:
Felix Abt, Forschungsgesellschaft Fuer Strahlwerkzeuge Fgsw; Stuttgart Germany
Andreas Blug, Fraunhofer Institute for Physical Measurement Techniques Ipm; Freiburg Germany
Leonardo Nicolosi, Iee Institut Fuer Grundlagen Der Elektrotechnik U. Elektronik; Dresden Germany
Friedrich Dausinger, Dausinger & Giesen Gmbh; Stuttgart Germany
Rudolf Weber, Institut Fuer Strahlwerkzeuge Ifsw; Stuttgart Germany
Ronald Tetzlaff, Iee Institut Fuer Grundlagen Der Elektrotechnik U. Elektronik; Dresden Germany
Daniel Carl, Fraunhofer Inst...