Hannover 2016 – wissenschaftliches Programm
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K: Fachverband Kurzzeitphysik
K 2: Light Sources - EUV and Lasers
K 2.2: Vortrag
Montag, 29. Februar 2016, 16:10–16:30, f428
High-energy pump line for Ytterbium based frequency synthesizer — •Anne-Laure Calendron1,2, Emma Kueny3, Huseyin Cankaya1, Fabian Reichert1,2, Michael Hemmer1, Luis E. Zapata1, Joachim Meier1, Johann Derksen1, Giovanni Cirmi1,2, Oliver D. Mücke1,2, and Franz X. Kärtner1,2,4 — 1Center for Free-Electron Laser Science, Deutsches Elektronen Synchrotron, and Department of Physics, University of Hamburg, Hamburg (D) — 2The Hamburg Centre for Ultrafast Imaging, Hamburg (D) — 3Université Paris Sud, Orsay (F) — 4RLE, MIT, Cambridge (USA)
Attosecond pulses are sought for experiments investigating intra-atomic phenomena on the attosecond or femtosecond time scale, and can currently only be obtained via high-harmonics generation (HHG) in gases. The laser driver system we develop for HHG is capable of delivering a broadband spectrum covering several octaves with high energy, obtained via parallel parametric amplification stages. Here, we will present the developments of the ytterbium based pump laser for high-energy OPCPAs.
The output of a regenerative amplifier delivering 5mJ pulses at 1µm is divided into 2 parts: one is compressed to sub-ps duration and then used for generating broadband, low energy, CEP stable pulses as seed for OPCPAs. The other one is further amplified by a cryogenically cooled Yb:YAG amplifier before compression to <5ps duration and serves as OPCPA pump. These two arms require timing synchronization. We will present our latest results in the development of the pump line, compression of the high-energy pulses, and synchronization.