Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Green power – femtosecond laser system achieves record power

18.05.2011
The first ever laser to generate an average power of 280 W at 515 nm wavelength with perfect beam quality is now ready to operate at the touch of a button.

In the KORONA cooperation project, research scientists from the Fraunhofer Institute for Laser Technology ILT in Aachen installed a femtosecond laser at the Max Planck Institute of Quantum Optics MPQ in Garching. The turn-key laser is based on a Yb:INNOSLAB amplifier with frequency doubling. No other laser system has ever offered more output with diffraction-limited beam quality in the visible spectral range.


Femtosecond laser system with 280 W at 515 nm installed at the MPQ in Garching. Fraunhofer Institute for Laser Technology ILT, Aachen

Ultrashort laser pulses are an established tool in science and industry. In many areas, the range of applications can be expanded by scaling them up to high average output power. In recent years, beam source development has seen great progress on this front. Average output power of several hundred W with diffraction-limited beam quality have been demonstrated using Ytterbium-doped laser media at 1 µm wavelength in fiber, INNOSLAB and thin-disk geometry. The Fraunhofer ILT scientists hold the record with their Yb:INNOSLAB amplifier, generating an output power of 1.1 kW.

These beam sources must be reliable and easy to operate if they are to be used widely in science and industry. The scientists from Fraunhofer ILT have installed a laser system at the MPQ which delivers an average power of 280 W at 515 nm wavelength and an almost diffraction-limited beam quality of M²

Ultra-short-pulse lasers have manifold applications in materials processing. It is widely recognized that they offer higher-precision ablation than lasers with longer pulses. The femtosecond laser can process materials such as glass which are otherwise transparent for light with the laser wavelength. This ability is based on the process of multiphoton absorption which occurs at high peak intensities. Frequency conversion from the infrared to the green spectral range doubles the photon energy. As a result, fewer photons are needed for absorption, making it more effective.

Another application of green laser radiation is the processing of copper and other materials which absorb radiation particularly well in this spectral range. Scaling up the average power permits a higher throughput and renders industrial use economically viable, as the costs per watt are significantly reduced. The aim of the KORONA cooperation project between the Max-Planck-Gesellschaft and the Fraunhofer-Gesellschaft is to produce coherent radiation with wavelengths in the extreme ultraviolet region below 100 nm. This wavelength range can be opened up by generating high harmonics of femtosecond radiation. Scaling up the average power creates the potential for new applications in this wavelength range. What’s more, INNOSLAB lasers are commercially available. The company EdgeWave GmbH, a spin-off from Fraunhofer ILT, has been marketing pulsed solid-state lasers based on the INNOSLAB platform for scientific and industrial use for about ten years. The company Amphos GmbH, another Fraunhofer ILT spin-off, develops and sells Yb:INNOSLAB lasers in the power range from 100 W to 1000 W.

The Yb:INNOSLAB amplifier will be presented at LASER World of Photonics in Munich from May 23 to 26, 2011, on the joint Fraunhofer booth (Hall C2, Booth 330). Dipl.-Ing. Hans-Dieter Hoffmann will also give a talk about the Yb:INNOSLAB amplifier in the Photonics Forum at the trade show.

Session: Solid state lasers – novel developments

May 24, 2011, 14:00 h to 16:30 h
Photonics Forum, Hall B2, Booth 421
16:20 h: “High Power Ultrafast Laser with Average Power up to kW Range”, Dipl.-Ing. Hans-Dieter Hoffmann
Contacts
If you have any questions our experts will be pleased to assist:
Fraunhofer Institute for Laser Technology ILT
Dr. rer. nat. Peter Rußbüldt
Ultrafast Lasers
Phone +49 241 8906-303
peter.russbueldt@ilt.fraunhofer.de
Dipl.-Ing. Hans-Dieter Hoffmann
Lasers and Optics
Phone +49 241 8906-206
hansdieter.hoffmann@ilt.fraunhofer.de
Fraunhofer Institute for Laser Technology ILT
Steinbachstr. 15
52074 Aachen
Phone +49 241 8906-0
Fax +49 241 8906-121
Max Planck Institute of Quantum Optics MPQ
Prof. Dr. Ferenc Krausz
Phone + 49 89 32905-602
Fax + 49 89 32905-649
ferenc.krausz@mpq.mpg.de
Max Planck Institute of Quantum Optics MPQ
Hans-Kopfermann-Str. 1
85748 Garching
Phone + 49 89 3 29 05-0
Fax + 49 89 3 29 05- 200

Axel Bauer | Fraunhofer-Institut
Further information:
http://www.ilt.fraunhofer.de
http://www.mpq.mpg.de

More articles from Machine Engineering:

nachricht Satellite-based Laser Measurement Technology against Climate Change
17.01.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht LZH optimizes laser-based CFRP reworking for the aircraft industry
24.11.2016 | Laser Zentrum Hannover e.V.

All articles from Machine Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>