Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Poster: Quantum Optics and Photonics IV
Q 58.52: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Generation of sub 10 fs UV pulses with MHz repetition rate — •Sven Kleinert1, Ayhan Tajalli1, Bernhard Kreipe1, Yuliya Khanukaeva1, Tamas Nagy1,3, and Uwe Morgner1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, 30167 Hannover — 2Laserzentrum Hannover e.V., 30419 Hannover — 3Laser-Laboratorium Göttingen e.V., 37077 Göttingen
Energetic ultrashort UV pulses at high repetition rates are essential for wide fields of applications e.g. nonlinear imaging and ultrafast spectroscopy. A well-established technique for generation of such pulses is optical parametric amplification (OPA). However, the lack of proper nonlinear media as well as pump and seed sources make them difficult for UV pulse generation. One possible solution to this problem is a frequency conversion of these sources. Here, we present a broadband OPA in the visible region with a repetition rate of 1MHz which is used for generation of UV pulses with duration of sub 10fs via frequency doubling process. The driving laser source for this experiment is an Ytterbium-doped rod-type-fiber amplifier system delivering 600fs IR pulses with pulse energy of 50µJ. This source is used for generation of pump and seed for the OPA via third harmonic and supercontinuum generation processes in BBO and YAG crystals respectively. This very compact setup supports the generation of sub 9fs pulses in the visible range with pulse energy of more than 700nJ. The generation of sub 10fs UV pulses with pulse energy of more than 40nJ at 1MHz repetition rate is then guaranteed via second harmonic generation of the output.