OPUMAC – Optical pulse bursts for micromachining of metals and ceramics
1 March 2017 to 30 November 2020
Sponsored by: 
German Federal Ministry of Education and Research (BMBF)


An ultrashort pulse laser is an advanced tool for the processing of material with strongly reduced temperature effects, resulting from cold ablation. It is used for self-organization techniques, precise micro-structuring of material, highly controlled surface texturing, the manufacturing of miniaturized components, and the production of high-quality thin layers. The low dissemination of ultrafast lasers in industrial micro-material processing mainly results from the limited ablation speed. An interesting and until recently quite underestimated technique to increase the ablation speed is to generate pulse bursts at a rather low repetition rate, which comprise a high number of ultrashort laser pulses with a high intra-burst repetition rate.

The project aims for the development of a unique femtosecond Yb-doped fiber laser system at a central wavelength of around 1 µm, operating in burst-mode, and its application in micro-material processing of different industrially relevant materials. This laser system will be engineered to the level of an industrial prototype, and will be tested in typical, relevant micro-material processing applications and compared with existing laser systems.

This project is conducted in cooperation with Bilkent University (http://www.bilkent.edu.tr/) and FiberLAST, Inc. (https://www.fiberlast.com.tr/) in Ankara and Micreon GmbH (http://www.micreon.de/) in Hannover.