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ICALEO 2005

210 Products.
Page: 1, 2, 3, 4, 5, 6, 7, 8, 9

ICALEO 2005 Paper #2208 (In-Process Monitoring and Adaptive Control in Pulsed YAG Laser Butt Micro-Welding of Titanium)

ICAL05_2208

In-Process Monitoring and Adaptive Control in Pulsed YAG Laser Butt Micro-Welding of Titanium
Authors:
Masayuki Kito, JWRI, Osaka University; Ibaraki Osaka Japan
Hiroshi Nakamura, Horikawa Inc.; Sabae Fukui Japan
Seiji Katayama, JWRI, Osaka University; Ibaraki Osaka Japan
Yousuke Kawahito, JWRI, Osaka University; Ibaraki Osaka Japan
Presented at ICALEO 2005

Titanium is used as glasses frames because of its lightweight and good mechanical properties. On the other hand, a fiber laser with high beam quality is a promising heat source to produce a sound weld of satisfactory depth with good surface appearances, narrow heat-affect zones and high strength. Ther...

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ICALEO 2005 Paper #2209 (Solidification Rate in Laser Welding and Its Influence on Aluminum Alloy 2024 Weld Quality)

ICAL05_2209

Solidification Rate in Laser Welding and Its Influence on Aluminum Alloy 2024 Weld Quality
Authors:
Bin Hu, Netherlands Institute for Metals Research; Delft Netherlands
I. Richardson, Delft University of Technology; Delft Holland Netherlands
Presented at ICALEO 2005

Aluminium alloy 2024 is one of important heat treatable aluminium alloys with its strength gained from the precipitation hardening. Experiments were conducted on Nd:YAG laser keyhole welding of AA2024(T3) sheet of different thicknesses. It was found that the fusion zone of the weld becomes the weakest zone after welding due to the precipitate dissolution. The results obtained from the samples of different thickness show...

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ICALEO 2005 Paper #2301 (Sensor Integration for Robotic Laser Welding Processes)

ICAL05_2301

Sensor Integration for Robotic Laser Welding Processes
Authors:
Dimitrios Iakovou, University of Twente; Enschede Netherlands
Presented at ICALEO 2005

The use of robotic laser welding is increasing among industrial applications, because of its ability to weld objects in three dimensions. Robotic laser welding involves three sub-processes: seam detection and tracking, welding process control, and weld seam inspection. Usually, for each sub-process, a separate sensory system is required. This may lead to heavy and bulky tools, whereas compact and light sensory systems are needed to reach sufficient accuracy and accessibility. In out solution we will integrate all these functions in one compact mu...

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ICALEO 2005 Paper #2304 (Monitoring of Nd:YAG Laser Spot Welding - Detection of Porosity Defect by Weld Sound)

ICAL05_2304

Monitoring of Nd:YAG Laser Spot Welding - Detection of Porosity Defect by Weld Sound
Authors:
Tadashi Misu, Chiba Institute of Technology; Chiba Japan
Shunro Yoshioka, Chiba Institute of Technology; Narashino Chiba Japan
T. Tokunaga, Chiba Institute of Technology; Narashino Chiba Japan
Toshiyuki Miyazaki, Chiba Institute of Technology; Narashino Chiba Japan
Yosuke Kitamura, Chiba Institute of Technology; Narashino Japan
Presented at ICALEO 2005

The generation of porosity defect is detected by analyzing the generated sound in Nd:YAG laser spot welding of stainless steel sheet (AISI304). The welding is done by a single pulse. The short-Time Four...

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ICALEO 2005 Paper #2305 (In-Process Monitoring and Adaptive Control for Lap Welds of Aluminum Alloy Sheets)

ICAL05_2305

In-Process Monitoring and Adaptive Control for Lap Welds of Aluminum Alloy Sheets
Authors:
Yousuke Kawahito, JWRI, Osaka University; Ibaraki Osaka Japan
Seiji Katayama, JWRI, Osaka University; Ibaraki Osaka Japan
Presented at ICALEO 2005

A new procedure of in-process monitoring and adaptive control has been developed for laser micro-spot lap welding of A3003 aluminum alloy sheets. The objective is to stably produce sound partial- and full-penetration welds without through-holes. In partial-penetration welds, the reflected laser beam and the radiated heat from the welding area were effective as in-process monitoring signals in detecting melting and though-hole formation in the uppe...

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ICALEO 2005 Paper #2307 (Advantages of Coaxial External Illumination for Monitoring and Control of Laser Materials Processing)

ICAL05_2307

Advantages of Coaxial External Illumination for Monitoring and Control of Laser Materials Processing
Authors:
Boris Regaard, Fraunhofer ILT; Aachen Germany
Stefan Kaierle, Fraunhofer ILT; Aachen NRW Germany
Wolfgang Schulz, Fraunhofer ILT; Aachen Germany
Anas Moalem, Lehrstuhl f�r Lasertechnik, Aachen University; Aachen Germany
Presented at ICALEO 2005

Due to the progressive use of laser materials processing in industrial mass production and the continuous expansion of process limits, the need of sensor systems for process monitoring increases. Sensor systems are used in process development for gathering process information as well as in the production pro...

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ICALEO 2005 Paper #301 (Laser-Tig Hybrid Welding of Very Thin Austenitic Stainless Steel Sheets)

ICAL05_301

Laser-Tig Hybrid Welding of Very Thin Austenitic Stainless Steel Sheets
Authors:
Jorge L. Arias, AIMEN; Porri�o Pontevedra Spain
Ambroise Vandewynckele, AIMEN; Porri�o Pontevedra Spain
Joaqu�n V�zquez, AIMEN; Porri�o Pontevedra Spain
Pablo Romero, AIMEN; Porri�o Pontevedra Spain
Presented at ICALEO 2005

Laser welding of austenitic stainless steel sheets to produce thin wall pipes and chimneys requires an excellent cut edge preparation and a very precise fitting. In order to relax these requirements, laser-TIG hybrid welding of very thin 316L stainless steel sheets (0.4-0.8 mm thick) in a butt joint configuration has been studied. A diode-pumped Nd:YAG lase...

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ICALEO 2005 Paper #302 (Fundamental Study on Welding Phenomena in Pulsed Laser-Gma Hybrid Welding)

ICAL05_302

Fundamental Study on Welding Phenomena in Pulsed Laser-Gma Hybrid Welding
Authors:
Susumu Tsukamoto, National Institute for Materials Science; Tsukuba Ibaraki Japan
Tomohiro Sugino, National Institute for Materials Science; Ibaraki Japan
Terumi Nakamura, National Institute for Materials Science; Tsukuba Japan
Goro Arakane, National Institute for Materials Science; Tsukuba Ibaraki Japan
Presented at ICALEO 2005

Hybrid welding phenomena such as the interaction between the arc and laser plume, bead formation and metal transfer have been investigated. CW or power modulated CO2 laser is combined with pulsed GMA process. Pulsing frequency, arc current and arc v...

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ICALEO 2005 Paper #303 (A Study of the Phenomenon of CO2-Laser Welding with Filler Wire and CO2-MAG Hybrid Welding)

ICAL05_303

A Study of the Phenomenon of CO2-Laser Welding with Filler Wire and CO2-MAG Hybrid Welding
Authors:
Anna Fellman, LUT; Lappeenranta Finland
Antti Salminen, LUT; Lappeenranta Finland
Presented at ICALEO 2005

Laser hybrid welding is today a topic with special interest from both researchers of laser welding and utilizing industry. This is due to the problems of normal autogenous laser welding encountering especially explain case of producing large metal structures.
There are quite a few theories presented how the laser and arc welding processes form a united process. Most of the advantages gained is said to be caused by the fact that the processes act together and support each other...

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ICALEO 2005 Paper #304 (Metallurgical Study on Laser - MAG Hybrid Welding of HSLA-590 Steel)

ICAL05_304

Metallurgical Study on Laser - MAG Hybrid Welding of HSLA-590 Steel
Authors:
Muneharu Kutsuna, Nagoya University; Nagoya Japan
Zhong Liu, Nagoya University, School of Engineering ; Nagoya Japan
Presented at ICALEO 2005

The Laser-Arc hybrid welding of HSLA-590 steel has been studied using 2.4kW CO2 laser and 350A MAG welding machine. There are many parameters in hybrid welding process. Each parameter affects the welding results in hybrid welding. The defocusing distance, distance between laser and arc, welding speed, arc torch angle, arrangement of laser and arc, arc welding current and voltage are investigated. Arc leading hybrid welding is better than laser leading hybrid welding ...

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ICALEO 2005 Paper #305 (Laser - MIG Hybrid Weldability of High Strength Steel for Car Industry)

ICAL05_305

Laser - MIG Hybrid Weldability of High Strength Steel for Car Industry
Authors:
Mok-Young Lee, RIST; Pohang Kyongsangbukdo Korea
Presented at ICALEO 2005

Main purpose of this study was compare between laser and hybrid weldability of high strength TRIP steel for car industry. For hybrid welding, 2kW CW Nd-YAG laser and 350A inveter controlled MIG power source was used. Plasma and metal transfer was studied with high speed photography. Perfomance of welds were studied in fatigue test.

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ICALEO 2005 Paper #306 (Experimental Analysis of Practical Aspects of Hybrid Welding of Thick Sections)

ICAL05_306

Experimental Analysis of Practical Aspects of Hybrid Welding of Thick Sections
Authors:
Edward Reutzel, Applied Research Laboratory, Pennsylvania State University; State College PA USA
Jay Tressler, Applied Research Laboratory, Pennsylvania State University; State College PA USA
Shawn Kelly, Applied Research Laboratory, Pennsylvania State University; State College PA USA
Richard Martukanitz, Applied Research Laboratory, Pennsylvania State University; State College PA USA
Presented at ICALEO 2005

Laser-Gas Metal Arc (GMA) hybrid welding is fast making the transition from laboratory to production, in industries as diverse as shipbuilding to automobile manufa...

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ICALEO 2005 Paper #307 (Hybrid Bifocal Laser Welding of Aluminium)

ICAL05_307

Hybrid Bifocal Laser Welding of Aluminium
Authors:
Andreas Trautmann, Iwb Technical University of Munich; Garching Germany
Michael Zaeh, IWB, Technical University of Munich; Garching Germany
Presented at ICALEO 2005

This paper renders the welding of extruded aluminium by a hybrid bifocal laser system. The aluminium alloy considered is EN AW-6060 (AlMgSi0,5) temper T66 without and with filler wire Al4047 A (SG-AlSi12). The hybrid laser system consists of a combination of an Nd:YAG laser with a high power diode laser (HPDL), both of 3 kW maximum output power. The beam parameter product (BPP) of the employed Nd:YAG laser of 25 mm*mrad translates with an optical system of focal length ...

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ICALEO 2005 Paper #401 (High Power Conversion Efficiency Diode Lasers)

ICAL05_401

High Power Conversion Efficiency Diode Lasers
Authors:
Manoj Kanskar, Alfalight, Inc.; Madison WI USA
E. Stiers, Alfalight, Inc.; Madison WI USA
T. Goodnough, Alfalight Inc; Madison WI USA
D. Botez, University of Wisconsin-Madison; Madison WI USA
L.J. Mawst, University of Wisconsin-Madison; Madison WI USA
Presented at ICALEO 2005

Diode lasers have been optimized for maximum electrical-to-optical power conversion efficiency for use as pump source for high-energy solid-state lasers, fiber-lasers, telecommunication fiber amplifiers and industrial lasers. We will discuss modeling and the latest experimental data on 797nm, 808nm, 915 nm and 975 nm ...

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ICALEO 2005 Paper #402 (> 76% CW Wall-plug Efficiency at High Powers from 0.98-µM Emitting Laser Diodes: Sheds Shows Route To 1kw Cw Diode Laser Bar)

ICAL05_402

> 76% CW Wall-plug Efficiency at High Powers from 0.98-µM Emitting Laser Diodes: Sheds Shows Route To 1kw Cw Diode Laser Bar
Authors:
Paul Crump, nLight Corporation; Vancouver WA USA
Shiguo Zhang, nLight Corporation; Vancouver WA USA
Weimin Dong, nLight Corporation; Vancouver WA USA
Mike Grimshaw, nLight Corporation; Vancouver WA USA
Damian Wise, nLight Corporation; Vancouver WA USA
Mark DeFranza, nLight Corporation; Vanouver WA USA
Sandrio Elim, nLight Corporation; Vancouver WA USA
Jun Wang, nLight Corporation; Vancouver WA USA
Jason Farmer, NLight Corporation; Vancouver WA USA
Suhit Das, nLight...

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ICALEO 2005 Paper #403 (High-Efficiency, High Power Laser Diodes)

ICAL05_403

High-Efficiency, High Power Laser Diodes
Authors:
Matthew Peters, JDS Uniphase; San Jose CA USA
Erik Zucker, JDS Uniphase; San Jose CA USA
Victor Rossin, JDS Uniphase; San Jose CA USA
Bruno Acklin, JDS Uniphase; San Jose CA USA
Presented at ICALEO 2005

Laser diodes and bars with high efficiency and power are used for a wide variety of applications including direct material processing and pumping fiber and solid state lasers. Efficient electro-optical. conversion is critical to achieve high output power as it allows to reduce dissipated heat and cooling load. This work presents progress achieved by JDSU in the DARPA Super High Efficiency Diode Sources (SHED...

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ICALEO 2005 Paper #404 (High Power, High Efficiency Vertical Cavity Surface Emitting Laser for Diode Pumping)

ICAL05_404

High Power, High Efficiency Vertical Cavity Surface Emitting Laser for Diode Pumping
Authors:
Chuni Ghosh, Princeton Optronics; Mercerville NJ USA
Jean-F Seurin, Princeton Optronics; Mercerville NJ USA
Art D�Asaro, Princeton Optronics; Mercerville NJ USA
Delai Zhou, Princeton Optronics; Mercerville NJ USA
Jongwoo Kim, Princeton Optronics; Mercerville NJ USA
James Wynn, Princeton Optronics; Mercerville NJ USA
John Boardman, Princeton Optronics; Mercerville NJ USA
Presented at ICALEO 2005

Princeton Optronics is a participant of the SHEDS program. In this program, we are developing high power, high efficiency VCSEL devic...

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ICALEO 2005 Paper #405 (High Power GaInAs VCSEL Arrays)

ICAL05_405

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 ...

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ICALEO 2005 Paper #406 (Large-area, Semiconductor Transverse Bragg Resonance (TBR) Lasers for Efficient, High Power Operation)

ICAL05_406

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...

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ICALEO 2005 Paper #407 (Spectral Stabilization of High Efficiency Diodes and Diode Bars by External Bragg Resonator)

ICAL05_407

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...

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ICALEO 2005 Paper #409 (High-Power Diode Laser Array Metrology)

ICAL05_409

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...

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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)

ICAL05_503

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...

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ICALEO 2005 Paper #504 (Combining High-Speed Laser Perforation and Cold Roll Forming for the Production of Bio-Medical Micro-Filtration Membranes)

ICAL05_504

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...

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ICALEO 2005 Paper #506 (Welding with Fibre Lasers from 200 to 17000 W)

ICAL05_506

Welding with Fibre Lasers from 200 to 17000 W
Authors:
Frank Vollertsen, BIAS Bremer Institut f�r angewandte Strahltechnik; Bremen Germany
Claus Thomy, BIAS Bremer Institut f�r 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...

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ICALEO 2005 Paper #507 (The Effect of Laser Beam Quality When Welding with High-Power CW Solid-State Lasers)

ICAL05_507

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...

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210 Products.
Page: 1, 2, 3, 4, 5, 6, 7, 8, 9

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