High repetition rate high-order harmonic generation up to the carbon K-edge in an antiresonant hollow-core fiber
Gebhardt M, Heuermann T, Klas R, Kirsche A, Liu C, Wang Z, Lenski M, Gaida C, Jauregui C, Antonio-Lopez J, Schülzgen A, Amezcua-Correa R, Rothhardt J, Limpert J (2021)
Publication Type: Conference contribution
Publication year: 2021
Journal
Publisher: SPIE
Book Volume: 11676
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Virtual, Online, USA
ISBN: 9781510641877
DOI: 10.1117/12.2578529
Abstract
Intense, ultrafast laser sources with an operation wavelength beyond the well-established near-IR are valuable tools for exploiting the wavelength scaling laws of strong-field, light-matter interactions. Such laser systems enable the scaling of the phase matching photon energy cut-off in high-order harmonic generation, which allows for the generation of coherent soft X-ray radiation up to, and even beyond, the water window. Such laser-driven sources enable a plethora of subsequent applications. A number of these applications can significantly benefit from an increase in repetition rate. In that regard, ultrafast thulium-doped fiber laser systems (providing a broad amplification bandwidth in the 2 μm wavelength region) represent a promising, average-power scalable laser concept for driving high-order harmonic generation. These lasers are capable of delivering ∼100 fs pulses with multi-GW peak power at hundreds of kHz repetition rate. In this work, we show that combining ultrafast thulium-doped fiber CPA systems with HHG in an antiresonant hollow-core fiber is a promising approach to realize high photon energy cut-off HHG from a compact setup. The realization is based on combining nonlinear pulse self-compression (leading to strong-field waveforms) and phase-matched high-order harmonic generation in a single antiresonant hollow-core fiber. In this demonstration, a photon energy cut-off of approximately 330 eV has been achieved, together with a photon flux >106ph/s/eV at 300 eV. These results emphasize the great potential of exploiting the HHG wavelength scaling laws with 2 μm fiber laser technology. Improvements of the HHG efficiency, the overall HHG yield and further laser performance enhancements will be the subjects of our future work.
Involved external institutions
Friedrich-Schiller-Universität Jena
Germany (DE)
University of Central Florida (UCF)
United States (USA) (US)
Germany (DE)
University of Central Florida (UCF)
United States (USA) (US)
How to cite
APA:
Gebhardt, M., Heuermann, T., Klas, R., Kirsche, A., Liu, C., Wang, Z.,... Limpert, J. (2021). High repetition rate high-order harmonic generation up to the carbon K-edge in an antiresonant hollow-core fiber. In Peter R. Herman, Michel Meunier, Roberto Osellame (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. Virtual, Online, USA: SPIE.
MLA:
Gebhardt, Martin, et al. "High repetition rate high-order harmonic generation up to the carbon K-edge in an antiresonant hollow-core fiber." Proceedings of the Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI 2021, Virtual, Online, USA Ed. Peter R. Herman, Michel Meunier, Roberto Osellame, SPIE, 2021.
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