1. Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany
2. Optics Department, Netherlands Organization for Applied Scientific Research (TNO), Stieltjesweg 1, 2628CK Delft, The Netherlands
3. Department of Laser Technologies, Center for Physical Sciences and Technology, Savanoriu Avenue 231, LT-02300 Vilnius, Lithuania
4. Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
5. Department of Electrical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
6. Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Straße 7, 07745 Jena, Germany