ICALEO 2011 Paper #M605 (On-Target Fluence Variation in a Multi-Magnification Laser Ablation System)
On-Target Fluence Variation in a Multi-Magnification Laser Ablation System
Authors:
Chen-Hsiung Cheng, Resonetics, LLC; Nashua NH USA
Sergey Broude, Resonetics, LLC; Nashua NH USA
Presented at ICALEO 2011
An algorithm of calculating fluence on-target in a mask-projection ablation system using an excimer laser will be reported. The algorithm extrapolates and obtains fluencies at multiple magnifications from one measurement at one magnification. To further enhance the capability, one can extend the algorithm to include one full set of fluencies under various pulse energies at one magnification. Our test results illustrate that the correct fluence at any magnification can be simply ...$28.00
ICALEO 2011 Paper #M604 (Applying of Refractive Spatial Beam Shapers with Scanning Optics)
Applying of Refractive Spatial Beam Shapers with Scanning Optics
Authors:
Alexander Laskin, Adloptica Optical Systems GmbH; Berlin Germany
Vadim Laskin, Adloptica Optical Systems GmbH; Berlin Germany
Presented at ICALEO 2011
Using of refractive beam shapers with laser scanning optics is often considered in realizing various industrial laser technologies as well as techniques used in scientific and medical applications. Today the galvo mirror scanners with F-theta, telecentric or other lenses as well as gantry systems are widely used in different applications like micromachining, solar cell manufacturing, microwelding, drilling holes, selective laser melting and others which perform...$28.00
ICALEO 2011 Paper #M603 (Large-Area Production of Dynamically Scaled Microstructures Using Diffractive Optical Elements)
Large-Area Production of Dynamically Scaled Microstructures Using Diffractive Optical Elements
Authors:
Bodo Wojakowski, Laser Zentrum Hannover e.V.; Hannover Germany
Ulrich Klug, Laser Zentrum Hannover e.V.; Hannover Germany
Rainer Kling, Laser Zentrum Hannover e.V.; Hannover Germany
Presented at ICALEO 2011
Drag-reduction of turbine-compressor-blades has been successfully demonstrated by using single-spot picosecond-laser-ablation. To accomplish this goal, small periodic riblets have been scribed into the blades surface parallel to the flow direction to reduce the turbulent airflow within the turbine. This approach is successful but lacks an industry-compatible pr...$28.00
ICALEO 2011 Paper #M602 (Efficient Use of Short Pulse Width Laser for Maximum Material Removal Rate)
Efficient Use of Short Pulse Width Laser for Maximum Material Removal Rate
Authors:
Ashwini Tamhankar, Newport Corporation; Santa Clara CA USA
Rajesh Patel, Newport Corporation; Santa Clara CA USA
Presented at ICALEO 2011
Any high volume laser manufacturing process demands high throughput, improved accuracy, and minimal thermal damage to the target material. The diode pumped solid state (DPSS) Q-switched nanosecond lasers are being used routinely today for many semiconductor & microelectronics and solar cell manufacturing processes. They offer low noise, high stability, and reliability required for a robust manufacturing process. Over the past few years the energy available per pul...$28.00
ICALEO 2011 Paper #M601 (Ultra-Short Pulse Laser Micro-Machining of Metals with Radial and Azimuthal Polarization)
Ultra-Short Pulse Laser Micro-Machining of Metals with Radial and Azimuthal Polarization
Authors:
O.J. Allegre, University of Liverpool; Liverpool Great Britain
W. Perrie, University of Liverpool; -
S.P. Edwardson, University of Liverpool; -
G. Edwardson, University of Liverpool; -
K.G. Watkins, University of Liverpool; -
Presented at ICALEO 2011
Laser-material interactions are known to be strongly influenced by the polarization of the incident laser beam. In particular, polarization affects both the efficiency and the quality of ultra-short pulse micro-processes such as helical drilling and cutting. The potential benefits of using radial ...$28.00
ICALEO 2011 Paper #M506 (A Study of Laser Ablation Near the Critical Point)
A Study of Laser Ablation Near the Critical Point
Authors:
Hyungson Ki, Ulsan National Institute of Science and Technology (UNIST); Ulsan South Korea
Presented at ICALEO 2011
Laser ablation is arguably the most important application areas of pulsed lasers, and is also the foundation of many other applications, such as precision microfabrication and pulsed laser deposition. However, underlying physical phenomena are still far from completely understood because ablation occurs at extremely high temperatures and pressures. In this study, the author investigate laser material interaction with emphasis on how a material behaves near the critical point. Employing temperature-dependent material proper...$28.00
ICALEO 2011 Paper #M505 (Laser Ablation: Optimising Material Removal Rate with Limited Oxidation for Ti6Al4V)
Laser Ablation: Optimising Material Removal Rate with Limited Oxidation for Ti6Al4V
Authors:
S. Davies, Swansea University, Rolls-Royce plc; Swansea Great Britain
J. Kell, Rolls-Royce plc; Derby Great Britain
M. C. Kong, The University of Nottingham; Nottingham Great Britain
D. Axinte, The University of Nottingham; Nottingham Great Britain
K. Perkins, Swansea University; Swansea Great Britain
Presented at ICALEO 2011
Laser ablation is a method of removing relatively small volumes of material from a substrate, and this technique is finding a wide range of exploitation avenues in industry; such as large scale paint remover to composite resin rem...$28.00
ICALEO 2011 Paper #M504 (Experimental Study of Producing Non-Tapered Holes Using a High Peak Power Pulsed Nd:YAG Laser)
Experimental Study of Producing Non-Tapered Holes Using a High Peak Power Pulsed Nd:YAG Laser
Authors:
Li Qiang, Beijing University of Technology; Beijing Peoples Republic of China
Jiang Meng-hua, Beijing University of Technology; Beijing Peoples Republic of China
Lei Hong, Beijing University of Technology; Beijing
Wang Jin-Guo, Beijing University of Technology; Beijing Peoples Republic of China
Hui Yong-ling, Beijing University of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2011
In order to producing parallel holes, a modified pulsed Nd:YAG laser for laser percussion drilling was presented . The resonator-amplifier stru...$28.00
ICALEO 2011 Paper #M503 (Stability Limits of Laser Drilled Hole Arrays On Large Areas)
Stability Limits of Laser Drilled Hole Arrays On Large Areas
Authors:
Nelli Hambach, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Claudia Hartmann, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Jens Holtkamp, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Arnold Gillner, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Presented at ICALEO 2011
Large area micro drilling utilizing short pulsed solid state lasers is becoming an important manufacturing technique in the filtration technology. High transmittance and quality of the drilled holes are the main challenges. Roundness and diameter variation ...$28.00
ICALEO 2011 Paper #M502 (Micromachining on Thermal Barrier Coated Supperalloy Using a Nanosecond Fiber Laser)
Micromachining on Thermal Barrier Coated Supperalloy Using a Nanosecond Fiber Laser
Authors:
Hongkun Lai, University of Michigan; -
Huan Qi, Shanghai Jiaotong University, University of Michigan; Shanghai Peoples Republic of China
Xinyang Shao, University of Michigan; -
Yuezhou Wang, University of Michigan; -
Jiayi Ding, University of Michigan; -
Chuming Zhao, University of Michigan; -
Presented at ICALEO 2011
As the advance of gas turbine engines, turbine entry temperature has been continuously enhanced, which demands for high performance thermal barrier coatings and improved cooling arrangement on turbine blades. In recent y...$28.00
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