Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 34: Ultrashort Laser Pulses: Applications II
Q 34.7: Vortrag
Mittwoch, 10. März 2010, 15:30–15:45, F 342
Fiber Based Ultrashort Pulse System with Kilowatt Level Average Power — Tino Eidam1, •Stefan Hanf1, Thomas Andersen2, Enrico Seise1, Chrisitan Wirth3, Thomas Schreiber3, Thomas Gabler4, Jens Limpert1, and Andreas Tünnermann1,3 — 1Friedrich-Schiller-University Jena, Institute of Applied Physics, Albert-Einstein-Str. 15, 07745 Jena, Germany — 2NKT Photonics, Blokken 84, DK-3460 Birkeroed, Denmark — 3Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745 Jena, Germany — 4JT Optical Engine, Prüssingstr. 41, 07745 Jena, Germany
Ultrashort pulse laser systems combining simultaneously high peak and average power are desirable in many applications. Especially the high pulse repetition rate results in a reduced measurement time in fundamental science and in an increased processing speed for industrial applications. Extreme parameters, i.e. mJ-level pulses at average powers beyond one kilowatt and diffraction limited beam quality, is still a huge challenge for every existing laser architecture. The application of the chirped pulse amplification (CPA) technology in combination with photonic crystal fibers (PCFs) led to ultrashort pulses with mJ-level pulse energies. Herein we present a three-stage fiber CPA system generating 830 W of compressed average power at 78 MHz pulse repetition frequency and 640 fs pulse duration. Beside these record parameters we discuss possibilities to overcome limitations of current large mode area fiber amplifiers imposed by transversal spatial hole burning enabling fiber CPA systems with kW average power and GW peak power.