Results 151 to 160 of about 2,104 (200)

Femtosecond fiber laser welding of dissimilar metals

Applied Optics, 2014
In this paper, welding of dissimilar metals was demonstrated for the first time, to the best of our knowledge, by using a high-energy high-repetition-rate femtosecond fiber laser. Metallurgical and mechanical properties were investigated and analyzed under various processing parameters (pulse energy, repetition rate, and welding speed).
Huan, Huang, Lih-Mei, Yang, Shuang, Bai, Jian, Liu   +3 more
openaire   +2 more sources

Laser beam welding aerospace aluminum using fiber lasers

SPIE Proceedings, 2008
This work intends to contribute towards the knowledge of AA6013 aluminum alloy weldability, autogenously welded with a high-power fiber laser. The quality and metallurgical characterization of the welds were done considering laser speed and power as process parameters.
Milton S. F. Lima, Rudimar Riva, Aline C. de Oliveira, Gabriel R. Siqueira   +3 more
openaire   +1 more source

Femtosecond fiber laser welding of PMMA

SPIE Proceedings, 2015
Femtosecond-pulsed laser welding of transparent materials on a micrometer scale is a versatile tool for the fabrication and assembly of electronic, electromechanical, and especially biomedical micro-devices. In this paper, we report on microwelding of two transparent layers of polymethyl methacrylate (PMMA) with femtosecond laser pulses at 1030 nm in ...
Volpe Annalisa, Di Niso Francesca, Gaudiuso Caterina, De Rosa Andrea, Vázquez Rebeca Martínez, Ancona Antonio, Lugarà Pietro Mario, Osellame Roberto   +7 more
openaire   +2 more sources

Review study on remote laser welding with fiber lasers

Journal of Laser Applications, 2013
The appearance of the high-power fiber laser with brilliant beam quality enables a rapid development of remote laser welding (RLW). In this paper, a theoretical study of remote laser welding has been reviewed. As a promising technology, the RLW offers an increased flexibility, high operational speed, and reduced cycle time to process a wide range of ...
Lu, Jinhong, Kujanpää, Veli
openaire   +1 more source

Weld penetration and phenomena in 10 kW fiber laser welding

ICALEO 2007: 26th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2007
A high-power fiber laser can produce an ultra-high peak power density of MW/mm2 level corresponding to a focused electron beam, and is promising as one of the desirable heat sources for high-speed and deep-penetration welding. This research was undertaken with the objective of obtaining a fundamental knowledge of 10 kW high-power fiber laser welding on
Seiji Katayama, Yousuke Kawahito, Keisuke Kinoshita, Naoyuki Matsumoto, Masami Mizutani   +4 more
openaire   +1 more source

Laser welding of fiber array units

Applied Optics
We report the results of fabricating fiber array unit (FAU) connectors using a near IR laser welding process, locking fibers in proper position on planar glass substrates and forming strong glass-to-glass bonds, followed by final assembly using lower coefficient of thermal expansion (CTE) epoxies.
Stephan L, Logunov, Mark A, Quesada, Leonard C, Dabich, John L, Nord   +3 more
openaire   +2 more sources

Fundamentals of fiber laser remote welding and deep penetration welding

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009
Remote/scanner welding and deep penetration welding with a fiber laser of high power and high beam quality is receiving a great attention since the laser can achieve high-speed welding and deep penetraion welding for mass production. However, welding phenomena are not fully understood.
null Seiji Katayama, null Shinpei Oiwa, null Naoki Matsumoto, null Masami Mizutani, null Yosuke Kawahito   +4 more
openaire   +1 more source

New application possibilities for fiber laser welding

ICALEO 2007: 26th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2007
Due to their unique design, fiber lasers offer new possibilities in the field of laser welding. Especially their higher focusability is known to allow narrow and deep welds which help to increase weld performance and reduce heat input. But, as such beam sources are not yet common in industrial environments, their possibilities and main application ...
Gunther Göbel, Berndt Brenner, Eckhard Beyer   +2 more
openaire   +1 more source

Fiber laser hybrid welding of stainless steels

ICALEO 2008: 27th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2008
Laser welding gives better penetration than conventional welding methods and can significantly increase the welding speed. Use of laser hybrid welding can further enhance the welding speed by improving gap bridgeability and allowing the addition of filler metal to facilitate welding of special grades.
Anna Fellman, Elin M. Westin
openaire   +1 more source

Fiber laser – Compact source for micro-welding

ICALEO '98: Proceedings of the Laser Materials Processing Conference, 1998
Fiber lasers combine the advantages of solid-state lasers and diode lasers, such as high beam quality and high efficiency. Examinations concerning the micro-welding process were carried out with a 9 Watt CW fiber laser. The wavelength of 1100 nanometers is similar to Nd:YAG radiation, which is established in material processing.
H. K. Tönshoff, A. Ostendorf, K. Schäfer   +2 more
openaire   +1 more source