[1] Univ Appl Sci Aschaffenburg, Appl Laser & Photon Grp, Wuerzburger Str 45, D-63743 Aschaffenburg, Germany
[2] eXcorLab GmbH, Ind Ctr Obernburg, D-63784 Obernburg, Germany
[3] Tech Univ Darmstadt, Inst Appl Phys, Schlossgartenstr 7, D-64289 Darmstadt, Germany