Stuttgart 2012 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 5: Ultrakurze Laserpulse: Erzeugung 1
Q 5.4: Talk
Monday, March 12, 2012, 11:15–11:30, V38.01
Pulse compression in long hollow fibers — •Tamas Nagy1,2,3, Milutin Kovacev1,2, Uwe Morgner1,2, and Peter Simon3 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2QUEST, Center for Quantum Engineering and Space Time Research — 3Laser-Laboratorium Göttingen e.V.
Thank to the recently developed stretched flexible hollow fibers the interaction length of spectral broadening stages in pulse compressors has become freely scalable. This enables us to reach high compression ratios or to efficiently compress multi-mJ pulses. The potential of the new waveguides is demonstrated by systematically comparing the performance of standard 1 m long fibers to those of new 3-m capillaries for the compression of 1.1 mJ 71 fs pulses of a standard Ti:sapphire CPA system. The 3-m hollow fibers clearly outperform the 1 m ones in terms of both transmission and achievable spectral broadening. With an argon-filled 3 m long capillary a spectral broadening ratio (RMS) of 26 was achieved and the pulses were compressed to 4.5 fs duration. The new waveguide design inherently supports the pressure gradient scheme which is especially advantageous by the compression of high energy pulses.