Mainz 2017 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.74: Poster
Tuesday, March 7, 2017, 17:00–19:00, P OG1+2
A supercontinuum source in the extreme ultraviolet using HHG with an OPA system — •Julius Reinhard1, Martin Wünsche1,2, Silvio Fuchs1,2, Jan Nathanael1,2, Jakob Abel1, Christian Rödel1,3, and Gerhard Paulus1,2 — 1Institute of Optics and Quantum Electronics, Friedrich-Schiller-University Jena, Germany — 2Helmholtz Institute Jena, Germany — 3SLAC, USA
We present a supercontinuum source in the extreme ultraviolet (XUV) using high harmonic generation (HHG) driven by a table-top femtosecond laser and a tunable optical parametric amplifier. The near-infrared (NIR) pulses from the OPA generate the harmonic radiation. Usually the spectrum of the HHG is a comb with maxima at the odd multiples of the fundamental frequency. By averaging over different harmonic comb spectra with slightly different fundamental frequencies a continuous XUV spectrum in the range of 30 to 200 eV is realized [1]. For this, the driving laser wavelength from the OPA is swept automatically during the recording of the XUV spectrum and the supercontinuum is generated within a few seconds. The supercontinuum XUV source with a photon flux up to 3×108 photons per eV’s is well suited for applications like near-edge absorption fine structure spectroscopy (NEXAFS) [2] or XUV coherence tomography (XCT) [3] and marks an important step for realizing such applications in small-scaled laboratories.
[1] M. Wünsche et al., Optics Express, submitted (2016)
[2] J. Stöhr, NEXAFS spectroscopy, Springer Series in Surface Science, Vol. 25 (2013)
[3] S. Fuchs et al., Scientific Reports 6, 20658 (2016)