Erlangen 2022 – wissenschaftliches Programm
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 5: New Methods and Laser Diagnostics
K 5.3: Vortrag
Mittwoch, 16. März 2022, 17:30–17:45, K-H4
Recording terahertz pulses and their spectra in single-shot at the ELBE facility, by associating the photonic time-stretch and DEOS techniques — •Christelle Hanoun1, Christophe Szwaj1, Eleonore Roussel1, Serge Bielawski1, Pavel Evtushenko2, Christof Schneider2, Anton Ryzhov2, Michael Kuntzsch2, and Sergey Kovalev2 — 1PhLAM Laboratory, UMR CNRS 8523, Lille University, France — 2Radiation Source ELBE, Helmholtz-Zentrum Dresden-Rossendorf, Germany
Sources of intense terahertz radiation and/or high repetition rate are available for applications in several laser and accelerator facilities worldwide. This opened new opportunities, and several high-performance THz metrology systems have been demonstrated and employed for experiments. Nevertheless, some significant challenges in the field of THz measurements remain open. This concerns both Time-Domain Spectroscopy Applications as well as real-time diagnostics of the sources. We present here a novel THz electro-optic measurement strategy that aims at a high repetition rate (up to tens of millions of THz spectra per second when needed) thanks to the use of the so-called photonic time-stretch technique, and that is also capable of high effective bandwidth by using the recently introduced Diversity Electro-Optic Sampling (DEOS) retrieval technique (https://arxiv.org/abs/2002.03782). We will present the first tests of this design using terahertz pulses in the 100 nJ range, with 50 kHz repetition rate, generated by the Coherent Diffraction Radiation (CDR) source of ELBE, at Helmholtz-Zentrum Dresden-Rossedorf (HZDR).