ICALEO 2005 Paper #M406 (Femtosecond Bulk Laser Micromachining of Microfluid Channels in PMMA)
Femtosecond Bulk Laser Micromachining of Microfluid Channels in PMMA
Authors:
Dave Farson, Ohio State University; Columbus OH USA
Chun Lu, Ohio State University; Columbus OH USA
Hae Choi, Ohio State University; Columbus OH USA
Presented at ICALEO 2005
Bulk machining of transparent materials is an interesting capability of offered by short pulse lasers. When a laser beam with high peak pulse power is focused inside of a transparent material, the material becomes vaporized and ionized by the laser energy and its expansion causes a small pore to form at the interaction site. By translating the beam so that multiple pores are connected, microfluidic passages can be machin...$28.00
ICALEO 2005 Paper #M405 (Effect of Ionization on Femtosecond Laser Pulse Propagation in Silicon)
Effect of Ionization on Femtosecond Laser Pulse Propagation in Silicon
Authors:
Huayu Li, Michigan State University; East Lansing Michigan USA
Hyungson Ki, Michigan State University; East Lansing MI USA
Presented at ICALEO 2005
In this article, femtosecond laser pulse propagation in a silicon target is simulated by considering the ionization process under intense electromagnetic field of the laser pulse. The electromagnetic field is computed by solving the Maxwell�s equations using the Finite-Difference Time-Domain method, and the two-temperature model is employed for electron-lattice energy coupling phenomena. The electrical conductivity is predicted by computing the electron a...$28.00
ICALEO 2005 Paper #M403 (Processing of Polymers by UV Picosecond Lasers)
Processing of Polymers by UV Picosecond Lasers
Authors:
Gediminas Raciukaitis, Institute of Physics; Vilnius Lithuania
Mindaugas Gedvilas, Institute of Physics; Vilnius Lithuania
Presented at ICALEO 2005
UV laser radiation is widely used for processing of polymers. We present the results obtained by investigation of the laser ablation processes with picosecond pulses in about 20 different organic materials. Micro-drilling and cutting of polymers were performed by the 266-nm radiation. The effect of laser fluence on the ablation rate and drilling depth was investigated.
Most of the materials showed two ablation thresholds. One of them was below 1 J/cm2 with a low material removal ...$28.00
ICALEO 2005 Paper #M402 (Direct Writing of Buried Waveguides in Hybrid Organic-Inorganic Sol-Gel by Femto-Second Laser Pulses)
Direct Writing of Buried Waveguides in Hybrid Organic-Inorganic Sol-Gel by Femto-Second Laser Pulses
Authors:
David K.Y. Low, Singapore Institute of Manufacturing Technology; Singapore
Xiao Zhang, Singapore Institute of Manufacturing Technology; Singapore
Hong Xie, Singapore Institute of Manufacturing Technology; Singapore
Z.L. Li, Singapore Institute of Manufacturing Technology; Singapore Singapore
GC Lim, Singapore Institute of Manufacturing Technology; Singapore
S.K. Pani, Nanyang Technological University; Singapore
C.C Wong, Nanyang Technological University ; Singapore
Presented at ICALEO 2005
Using 77...$28.00
ICALEO 2005 Paper #M401 (Realization of Precision Shaped-Hole Drilling Using Ultra-Fast Lasers (Invited Paper))
Realization of Precision Shaped-Hole Drilling Using Ultra-Fast Lasers (Invited Paper)
Authors:
Chen-Hsiung Cheng, Panasonic Boston Laboratory; Cambridge MA USA
Xinbing Liu, Panasonic Boston Laboratory; Cambridge MA USA
Presented at ICALEO 2005
Recently we developed the technique of using ultra-fast laser for shaped-hole fabrication in industrial applications. In particular, inkjet nozzles of funnel shape can be fabricated reproducibly, precisely and in high speed using the ultra-fast laser fabrication technique. A PC-controlled scanning mirror is used to steer laser beam and form an overlapped two-dimensional tool path. Laser beam is repetitively scanned over the target area of the...$28.00
ICALEO 2005 Paper #M304 (Laser-Assisted Imprinting of Self-Assembled Nanostructures)
Laser-Assisted Imprinting of Self-Assembled Nanostructures
Authors:
Hao Wang, University of Nebraska-Lincoln; Lincoln NE USA
Yongfeng Lu, University of Nebraska-Lincoln; Lincoln NE USA
D.R. Alexander, University of Nebraska-Lincoln; Lincoln NE USA
D.W. Doerr, University of Nebraska-Lincoln; Lincoln NE USA
K. Mendu, University of Nebraska-Lincoln; Lincoln NE USA
Presented at ICALEO 2005
Nanoscale structuring is a promising area in which the easiest and effective processing methods are being developed. Based on the advantage of laser, associated with improved self-assembly technique, it is very effective to fabricate nanoscale structures, such a...$28.00
ICALEO 2005 Paper #M303 (Electron Beam Welding vs. Laser Beam Welding for Air Bearing Shaft)
Electron Beam Welding vs. Laser Beam Welding for Air Bearing Shaft
Authors:
Mohammed Naeem, GSI Lumonics; Rugby Great Britain
Presented at ICALEO 2005
Air bearings allow designers to push the envelope on precision and high-speed applications. Unlike contact roller bearings, air bearings utilise thin film pressurised air to provide ?zero friction? load bearing interface between surfaces that would otherwise be in contact with each other. Being non-contact, air bearings avoid the tradition bearing- related problems of friction, wear, and lubricant handling, and offer distinct advantages in precision positioning and high speed applications. Air bearings are a natural choice for applications in coo...$28.00
ICALEO 2005 Paper #M302 (Micro Welding of Thin Metals with Low Power Pulsed Nd:YAG laser)
Micro Welding of Thin Metals with Low Power Pulsed Nd:YAG laser
Authors:
Mohammed Naeem, GSI Lumonics; Rugby Great Britain
Presented at ICALEO 2005
The primary drivers in Microtechnology are getting smaller in size, increased sophistication and complexity, greater local intelligence, increased predication of in-service reliability and lower cost. These trends result in the need for new materials and assembly technologies and are consequently the adoption of pulsed laser as production tools. In order to adapt the processing speed to the average laser power pulsed laser operation is desirable. Currently some welding applications require very small spot size (30-40m) and pulse energies low as 10m...$28.00
ICALEO 2005 Paper #M210 (Direct Micro Laser Cladding with Microscale Nanophased Powders)
Direct Micro Laser Cladding with Microscale Nanophased Powders
Authors:
Peter Stippler, Laser Zentrum Hannover; 30419 Hannover Germany
Andreas Ostendorf, Laser Zentrum Hannover; 30419 Germany
Oliver Meier, Laser Zentrum Hannover; 30419 Hannover Germany
Stefan Czerner, microLS; Hannover Germany
Presented at ICALEO 2005
A manufacturing method is shown based on the most advanced small scale laser cladding technology able to shape solid metallic objects being composed of nanophased powders. New development in powder feeding will be illustrated being able to feed micro particles using combination of brush feeder and ultrasonic vibration. For gradient components...$28.00
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