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 presents latest VR and 5G technologies at Mobile World Congress
19.02.2018 | Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut, HHI

nachricht Come Together: Teamwork Achieves Optimum Composite Design
14.02.2018 | Fraunhofer-Institut für Lasertechnik ILT

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: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

'Lipid asymmetry' plays key role in activating immune cells

20.02.2018 | Life Sciences

MRI technique differentiates benign breast lesions from malignancies

20.02.2018 | Medical Engineering

Major discovery in controlling quantum states of single atoms

20.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>