ICALEO 2012 Paper #905 (Investigation of Thermal Lensing Time Constants in Laser Processing Optics)

Investigation of Thermal Lensing Time Constants in Laser Processing Optics
Authors:
Christiane Thiel, Institut fuer Strahlwerkzeuge, Univ. of Stuttgart; Stuttgart Germany
Rudolf Weber, Institut fuer Strahlwerkzeuge, Univ. of Stuttgart; Stuttgart Germany
Axel Hess, Institut fuer Strahlwerkzeuge, Univ. of Stuttgart; Stuttgart Germany
Thomas Graf, Institut fuer Strahlwerkzeuge, Univ. of Stuttgart; Stuttgart Germany
Presented at ICALEO 2012

High power solid state lasers at high beam quality undergo a rapid development these days. They are in demand for the manufacturing of, e.g., lightweight components and parts in the electronics industry. As shown in many pu...

ICALEO 2012 Paper #904 (102 W All-Fiber Broadband Superfluorescent Source Based on Ytterbium-Doped Double-Cladding Fibers)

102 W All-Fiber Broadband Superfluorescent Source Based on Ytterbium-Doped Double-Cladding Fibers
Authors:
Yi Cao, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Jiang Liu, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Ke Wang, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Pu Wang, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2012

Fiber lasers have numerous advantages over traditional solid state laser and CO2 laser, such as excellent beam qual...

ICALEO 2012 Paper #903 (High Power Disk Lasers - Advances & Applications)

High Power Disk Lasers – Advances & Applications
Authors:
David Havrilla, TRUMPF Inc. ; Plymouth MI USA
Tracey Ryba, TRUMPF Inc.; Plymouth MI USA
Marco Holzer, TRUMPF Laser und Systemtechnik GmbH; Ditzingen Germany
Presented at ICALEO 2012

Though the genesis of the disk laser concept dates to the early 90’s, the disk laser continues to demonstrate the flexibility and the certain future of a breakthrough technology. On-going increases in power per disk, and improvements in beam quality and efficiency continue to validate the genius of the disk laser concept. As of today, the disk principle has not reached any fundamental limits regarding output power per disk or bea...

ICALEO 2012 Paper #902 (Fiber-Coupled High Power Stabilized Green Laser for Material Processing Applications)

Fiber-Coupled High Power Stabilized Green Laser for Material Processing Applications
Authors:
Berthold Burghardt, INNOVAVENT GmbH; Goettingen Germany
Johannes Richter, INNOVAVENT GmbH; Goettingen Germany
Nick Hay, Powerlase Photonics Ltd.; Crawley Great Britain
Yili Guo, Powerlase Photonics Ltd.; Crawley Great Britain
Ian Baker, Powerlase Photonics Ltd.; Crawley Great Britain
Stuart Bashford, Powerlase Photonics Ltd.; Crawley Great Britain
Young Kwon, Powerlase Photonics Ltd.; Crawley
Jong Kab Park, EO Technics Co. Ltd.; Anyang South Korea
Hans-Juergen Kahlert, INNOVAVENT GmbH; Goettingen Germany
Pr...

ICALEO 2012 Paper #808 (TEA CO2 Laser Machining of Carbon Fiber-Reinforced Polymer Composites)

TEA CO2 Laser Machining of Carbon Fiber-Reinforced Polymer Composites
Authors:
Adel Salama, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The Univ. of Manchester; Manchester Great Britain
Paul Mativenga, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The Univ. of Manchester; Manchester Great Britain
Lin Li, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The Univ. of Manchester; Manchester Great Britain
Presented at ICALEO 2012

The use of carbon fiber-reinforced polymer (CFRP) composites has gained wide interests and applications in the aerospac...

ICALEO 2012 Paper #807 (Process-Reliable & Cost-Effective Laser Materials Processing)

Process-Reliable & Cost-Effective Laser Materials Processing
Authors:
Marco Lentjes, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Peter Bruns, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Michael Voss, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Klaus Reinecke, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Vitalij Lissotschenko, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Presented at ICALEO 2012

LIMO has developed the new generation DIOCUT systems with an output power in the range of 1.3 kW up to 4 KW out of a 400µm core fiber NA 0.12. Direct fiber coupled diode lasers have the potential to be mo...

ICALEO 2012 Paper #805 (Mass and Momentum Transfer of Oxygen Jet to the Melt in Laser Cutting of Mild Steel)

Mass and Momentum Transfer of Oxygen Jet to the Melt in Laser Cutting of Mild Steel
Authors:
Grigoriy Ermolaev, Institute of Theoretical and Applied Mechanics SB RAS; Novosibirsk Russia
Alexander Zaitsev, Institute of Theoretical and Applied Mechanics SB RAS; Novosibirsk Russia
Presented at ICALEO 2012

Momentum and heat transfer of inert gas jet to the melt in laser cutting is studied well by numerous researchers. Gas dynamic conditions of cutting with oxygen are significantly different from inert cutting: only 0.3 bar of high purity oxygen are enough to cut 10mm plate. Such a pressure level is absolutely insufficient for inert gas cutting. This paper is focused on the influence of...

ICALEO 2012 Paper #803 (Identification and Characterization of Analogies of Remote Fusion Cutting Processes Using Different Beam Sources)

Identification and Characterization of Analogies of Remote Fusion Cutting Processes Using Different Beam Sources
Authors:
Matthias Luetke, Fraunhofer IWS Dresden; Dresden Germany
Alexander Wagner, Fraunhofer IWS Dresden; Dresden Germany
Andreas Wetzig, Fraunhofer IWS Dresden; Dresden Germany
Eckhard Beyer, Fraunhofer IWS Dresden, TU Dresden; Dresden Germany
Presented at ICALEO 2012

Based on experimental investigations in 1985, researchers identified a remote cutting process with CO2-Lasers using no assist gas in order to conduct emergency restoration work in the gas industry. The task was to clean the head of out-of-control gas wells. A couple of years lat...

ICALEO 2012 Paper #802 (Impact of Thermal Focal Shift on Laser Cutting Processes with High Brightness Lasers)

Impact of Thermal Focal Shift on Laser Cutting Processes with High Brightness Lasers
Authors:
Sasia Eiselen, Bayerisches Laserzentrum GmbH; Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander Univ. Erlangen-Nuremberg; Erlangen Germany
Heiko Zapf, Bayerisches Laserzentrum GmbH; Erlangen Germany
Eugenia Mantel, Bayerisches Laserzentrum GmbH; Erlangen Germany
Lukas Hofmann, Chair of Photonic Technologies, Friedrich Alexander Univ. Erlangen-Nuremberg; Erlangen
Michael Schmidt, Bayerisches Laserzentrum GmbH; Erlangen Graduate School in Advanced Optical Technologies (SAOT), Chair of Photonic Technologies, Friedrich-Alexander Univ. ...

ICALEO 2012 Paper #801 (A Technical and Commercial Comparison of Fiber Laser and CO2 Laser Cutting)

A Technical and Commercial Comparison of Fiber Laser and CO2 Laser Cutting
Authors:
John Powell, Lulea Univ. of Technology, Laser Expertise Ltd; Luleå Sweden
Alexander Kaplan, Lulea Univ. of Technology; Lulea Sweden
Presented at ICALEO 2012

This paper presents a direct comparison of fiber laser and CO2 laser cutting machines from a "what laser should you buy next?" point of view. Both types of machine have their drawbacks and advantages, and a direct comparison needs to compare costs, cutting speeds, cut quality and several other factors, including maintenance and safety considerations. The overall conclusion of the paper is that, from a jobshop perspective, the CO2 laser is a mor...