Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Increasing the Productivity of Ultrafast Laser Systems

17.06.2015

To advance the development of ultrafast laser systems for the industry, research institutes are now concentrating on increasing system productivity. To achieve this goal, Fraunhofer ILT is working in several different ways: on the one hand it is building stronger systems with record performances in the kW range. On the other hand, its researchers are working on tailor-made solutions for different applications. At LASER 2015, Fraunhofer ILT will be presenting, among others, a module for pulse shortening and a test system for an adjustable infrared laser with high power, each of which show new ways to increase efficiency in materials processing.

At the last UKP-Workshop: Ultrafast Laser Technology in Aachen from Fraunhofer ILT in April 2015, the participants agreed that an increase in productivity is currently the most important issue in industrial ultrafast lasers. The increase depends on many parameters, for example, the pulse energy, repetition rate and process control. Shorter pulses allow for greater precision and completely new machining processes, e.g., by multiphoton absorption or filament formation in glass.


Thin Disc amplifier with 1.5 kW

© Fraunhofer ILT, Aachen, Germany

New Module to Shorten the Pulses of Ultrafast Lasers with Highest Average Power

Fraunhofer ILT has now developed an optical module that shortens the pulse duration of powerful ultrafast lasers by a factor of four. The compact module is suitable for use in lasers with up to 1 kW average power and energy from 10 to 200 µJ. A 1 ps pulse can thus be compressed to about 250 fs, during which less than 10 percent of energy is lost and the beam quality is maintained.

The patent-pending technology of the pulse-shortening module was funded by the Federal Ministry of Education and Research (BMBF) as part of the FOCUS project. In the further development of the module, significantly higher pulse energies are to be achieved.

The pulse-shortening module can be combined with a femtosecond laser in the power range of 150 W, which has been newly developed at Fraunhofer ILT. The module has been fine-tuned for robustness and economy thanks to its particularly simple design. In its power class, it is even superior to the significantly more powerful INNOSLAB laser. Both concepts are characterized by their almost diffraction-limited beam quality.

New Record: Femtosecond Laser with 1.5 kW

By combining Thin Disk and INNOSLAB amplifiers, Fraunhofer ILT has set a new record for ultrafast lasers: the system delivers 1.5 kW average power at a pulse duration of 710 fs. Further optimization specifically of the thin-disk amplifier system should enable power beyond the 2 kW limit. This development has been supported by the BMBF as part of the FOCUS Project, as well as by the TRUMPF Group.

Industrial laser systems in this power class are particularly suitable for the processing of large parts, for example, those made of carbon fiber reinforced plastic (CFRP).

Powerful USP system for the SWIR Range

New beam sources for the infrared range at wavelengths of 1.5 to 3.5 µm (SWIR) provide an example of ultrafast laser technology solutions by Fraunhofer ILT, tailored for specific applications. Many technically and economically interesting material classes have an extremely high absorption in SWIR, which makes a series of innovative applications possible. So far, however, there has been a lack of sufficiently powerful lasers in this range.

Scientists at Fraunhofer ILT have now developed a test system that delivers laser power even over 20 W at 1.6 to 3.0 µm. The pulse duration can be between 900 fs and 1.5 ns. They are currently working on power scaling to more than 50 W. The test system can be adapted to different drive lasers and, thus, provide a wide range of application parameters.
The new system allows users to make both feasibility studies and provides process-optimized beam parameters for production.

Fraunhofer ILT at the LASER World of Photonics in Munich, Germany

From 22 - 25 June 2015 experts from the Fraunhofer ILT will be showing, among others, the module for pulse shortening for ultrafast laser systems and the test system for adjustable infrared lasers with high power at the Fraunhofer joint stand A3.121.
The researchers will also be presenting the exhibits at the Fraunhofer media tour on Tuesday, June 23, 2015. It starts at 11:00 a.m. at Booth 341 in Hall B3 and ends at approximately 12:00 midday at Booth 121 in Hall A3, followed by a discussion and light refreshments.

Contact

Dr. Peter Rußbüldt
Group Manager Ultrafast Lasers
Telephone +49 241 8906-303
peter.russbueldt@ilt.fraunhofer.de

Dipl.-Phys. Thomas Sartorius
Ultrafast Lasers
Telephone +49 241 8906-615
thomas.sartorius@ilt.fraunhofer.de

Dr. Bernd Jungbluth
Group Manager Nonlinear Optics and Tunable Lasers
Telephone +49 241 8906-414
bernd.jungbluth@ilt.fraunhofer.de

Fraunhofer-Institute for Laser Technology ILT
Steinbachstraße 15
52074 Aachen, Germany

Weitere Informationen:

http://www.ilt.fraunhofer.de

Petra Nolis | Fraunhofer-Institut für Lasertechnik ILT

More articles from Trade Fair News:

nachricht Fraunhofer HHI with latest VR technologies at NAB in Las Vegas
24.04.2017 | Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut, HHI

nachricht Kiel nano research at the Hannover Messe
21.04.2017 | Christian-Albrechts-Universität zu Kiel

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

7th International Conference on Crystalline Silicon Photovoltaics in Freiburg on April 3-5, 2017

03.04.2017 | Event News

 
Latest News

DGIST develops 20 times faster biosensor

24.04.2017 | Physics and Astronomy

Nanoimprinted hyperlens array: Paving the way for practical super-resolution imaging

24.04.2017 | Materials Sciences

Atomic-level motion may drive bacteria's ability to evade immune system defenses

24.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>