Ultra-short pulses, extremely high performance and energies
In 2013 the Federal President for Technology and Innovation honoured the further development of ultra-short laser pulses (UKP lasers) from a research tool into a successful tool in series production with the German Future Prize.
A team of researchers at the Institute for Beam Tools (IFSW) at the University of Stuttgart has now succeeded in taking a further quantum leap in this field of technology that has become so important for highly precise material processing: for the first time the scientists processed carbon fibre-reinforced plastics (CFRP) with a laser of pulse length eight picoseconds with a mean power of up to 1.4 kilowatt and pulse energies of up to 4.5 millijoules (mJ).
This combination was able to be achieved for the first time worldwide. The high pulse energies are more favourable than a high pulse frequency for many applications and especially for processing CFRP.
The innovative laser source was developed at the IFSW in the framework of a cooperation project with Trumpf Laser GmbH funded by the Federal Ministry for Education and Research (BMBF). This source enables increasing the mean power through strengthening the pulse energy by means of an IFSW disk laser module and an ingenious arrangement of mirrors in a so-called multipass amplifier.
“Even the beam source itself set a new world record. Due to the unique combination of ultra-short pulses of high energy and a mean power in the kilowatt range, it enables highly precise processing with productivity never seen before“, according to the head of the IFSW and vice rector for knowledge and technology transfer at the University of Stuttgart, Prof. Thomas Graf.
In initial experiments this laser source was now used to process various materials. Separating and drilling carbon-reinforced plastics, where an increase in performance is particularly important for industrial applications in the construction of aircraft and automobiles was thereby the main issue.
Research has long been performed at the IFSW with the support of the Baden-Württemberg Foundation on the underlying influencing variables with the laser processing of CFRP as well as with BMBF support in the implementation in industrial applications. That is why very good results could be achieved even in the initial experiments.
Therefore this success is also of great importance for the IFSW since it shows how productive a close cooperation between laser and process development is. Details on the laser source and the results described here as well as the latest experiments will also be presented at the Stuttgart Laser Days SLT’14 on 24th and 25th June 2014 at the Stuttgart Trade Fair, www.slt.uni-stuttgart.de .
Dr. Rudolf Weber, Dr. Marwan Abdou Ahmed, University of Stuttgart, Institute for Beam Tools,
Tel. 0711/685-66844, -69755, Email: weber (at) ifsw.uni-stuttgart.de, abdou-ahmed (at) ifsw.uni-stuttgart.de
Andrea Mayer-Grenu, University of Stuttgart, Department of University Communication, Tel. 0711/685-82176,
Email: andrea.mayer-grenu (at) hkom.uni-stuttgart.de
Andrea Mayer-Grenu | idw - Informationsdienst Wissenschaft
From ancient fossils to future cars
21.10.2016 | University of California - Riverside
Study explains strength gap between graphene, carbon fiber
20.10.2016 | Rice University
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences