ICALEO 2012 Paper #M1309 (High Average Power, High Energy Femtosecond Regenerative Amplifiers)

High Average Power, High Energy Femtosecond Regenerative Amplifiers
Authors:
Martin Delaigue, Amplitude Systemes; Pessac France
Robert Braunschweig, Amplitude Laser; Pessac France
Clemens Hönninger, Amplitude Systemes; Pessac France
Eric Mottay, Amplitude Systemes; Pessac France
Presented at ICALEO 2012

Femtosecond lasers gain increasing interest because of the unique combination of ultrashort pulse duration and extreme high peak power on the GW-level. In consequence, the machining process is dominated by multiphoton processes making it essentially universal and almost any type of material can be machined with excellent precision and quality. We report on...

ICALEO 2012 Paper #M1308 (High Pulse Energy, High Beam Quality Q-Switched MOPA Laser at 500Hz)

High Pulse Energy, High Beam Quality Q-Switched MOPA Laser at 500Hz
Authors:
Zhenxu Bai, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Mingliang Long, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Liyuan Chen, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Meng Chen, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Gang Li, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2012

A 66.4W LD-pu...

ICALEO 2012 Paper #M1307 (High Power 532nm Square Beam Delivery)

High Power 532nm Square Beam Delivery
Authors:
Andrew A. Chesworth, Lee Laser, Inc.; Orlando FL USA
Presented at ICALEO 2012

In the last few years laser scribing has become an important process in the manufacture of solar cells. Selective ablation of surface layers requires good control of the laser and a beam having flat intensity. In this paper we describe a method for generating square profiles based on the availability of new novel fibers. In one such application, a 300x300m square beam having a flat intensity profile is generated using a high power 50W green laser. The paper describes the method for generating such a beam and the possibility for future requirements of even smaller profi...

ICALEO 2012 Paper #M1306 (Investigating PCB Processing Using Q-Switched DPSS Nanosecond Green Laser)

Investigating PCB Processing Using Q-Switched DPSS Nanosecond Green Laser
Authors:
Ashwini Tamhankar, Spectra-Physics Lasers, Newport Corporation; Santa Clara CA USA
Rajesh Patel , Spectra-Physics Lasers, Newport Corporation; Santa Clara CA USA
Presented at ICALEO 2012

Diode Pumped Solid State (DPSS) Q-switched nanosecond pulsed laser is becoming a laser of choice for a wide variety of processes in PCB manufacturing. So far the demand of higher processing speed and higher quality machining has been overcome by a higher power, higher repetition frequency and smaller pulse width lasers available in the market. Increasing the Pulse Repetition Frequency (PRF) is usually a straight for...

ICALEO 2012 Paper #M1303 (Frequency Shifting of High Intensity Picosecond Lasers by Stimulated Raman Scattering)

Frequency Shifting of High Intensity Picosecond Lasers by Stimulated Raman Scattering
Authors:
Xu Yang, Institute of Laser Engineering, Beijing Univ. of Technology; beijing Peoples Republic of China
Chen Meng, Institute of Laser Engineering, Beijing Univ. of Technology; -
Li Zhengwei, Institute of Laser Engineering, Beijing Univ. of Technology; -
Chen Liyuan, Institute of Laser Engineering, Beijing Univ. of Technology; -
Yang Chao, Institute of Laser Engineering, Beijing Univ. of Technology; -
Li Gang, Institute of Laser Engineering, Beijing Univ. of Technology; -
Presented at ICALEO 2012

In recent years, with the rapid...

ICALEO 2012 Paper #M1302 (Hundreds of Milliwatts Super-Continuum Generation in All-Fiber Laser)

Hundreds of Milliwatts Super-Continuum Generation in All-Fiber Laser
Authors:
Chang Sun, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Tingwu Ge, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Jingjing Dai, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Feng Yu, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Zhiyong Wang, Institute of Laser Engineering, Beijing Univ. of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2012

This paper re...

ICALEO 2012 Paper #M1208 (Pulsed Laser Cutting of Bright Metals)

Pulsed Laser Cutting of Bright Metals
Authors:
Paul Harrison, SPI Lasers UK Ltd; Southampton Great Britain
Jack Gabzdyl, SPI Lasers UK Ltd; -
Presented at ICALEO 2012

Profile cutting of thin sheet bright metals can be achieved in a cost effective manner through the use of a pulsed fiber laser in conjunction with a galvanometric scanhead without co-axial assist gas. This is attractive where many batches of distinct small parts are manufactured in volume, for instance within the jewellery and the micro-electronics industries.

In this paper the capabilities of a pulsed fiber laser are considered in detail when processing bright metals such as brass, copper and silver. The effect...

ICALEO 2012 Paper #M1207 (High Precision and High Throughput Surface Structuring by Synchronizing Mechanical Axes with an Ultra Short Pulsed Laser System in MOPA Arrangement)

High Precision and High Throughput Surface Structuring by Synchronizing Mechanical Axes with an Ultra Short Pulsed Laser System in MOPA Arrangement
Authors:
Beat Jaeggi, Bern Univ. of Applied Science, Institute of Applied Laser, Photonics and Surface Technologies; Burgdorf Switzerland
Beat Neuenschwander, Bern Univ. of Applied Science, Institute of Applied Laser, Photonics and Surface Technologies; Burgdorf Switzerland
Urs Hunziker, Bern Univ. of Applied Science, Institute of Applied Laser, Photonics and Surface Technologies; Burgdorf Switzerland
Joseph Zuercher, Bern Univ. of Applied Science, Institute of Applied Laser, Photonics and Surface Technologies; Bleienbach Switze...

ICALEO 2012 Paper #M1205 (Laser-Beam Helical Drilling of High Quality Micro Holes)

Laser-Beam Helical Drilling of High Quality Micro Holes
Authors:
Christian Fornaroli, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Jens Holtkamp, Fraunhofer Institute for Laser Technology ILT; -
Arnold Gillner, Fraunhofer Institute for Laser Technology ILT; -
Presented at ICALEO 2012

A large variety of modern components and products such as fuel injectors and spinning nozzles require holes drilled to very high standards with regard to roundness, diameter and aspect ratio. Laser-beam helical drilling has shown great promise to produce these high quality micro holes. In helical drilling the laser beam is moved in rotation relative to the work piece....

ICALEO 2012 Paper #M1204 (Heat Accumulation in Short-Pulse Laser Processing of CFRP)

Heat Accumulation in Short-Pulse Laser Processing of CFRP
Authors:
Rudolf Weber, Institut für Strahlwerkzeuge (IFSW),; Stuttgart Germany
Christian Freitag, Institut für Strahlwerkzeuge (IFSW),; Stuttgart
Margit Hafner, Institut für Strahlwerkzeuge (IFSW),; Stuttgart
Volkher Onuseit, Institut für Strahlwerkzeuge (IFSW),; -
Peter Berger, Institut für Strahlwerkzeuge (IFSW),; Stuttgart
Thomas Graf, Institut für Strahlwerkzeuge (IFSW),; Stuttgart
Presented at ICALEO 2012

Short-pulse laser processing is usually referred to as cold" due to the very high intensities causing a large fraction of the processed material to...