Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Poster VI
A 33.26: Poster
Donnerstag, 14. März 2024, 17:00–19:00, Tent A
Nonlinear Pulse Compression Multi-Pass Cell characterized by Frequency-Resolved Optical Gating for Extreme-Ultraviolet Frequency Comb Generation — •Fiona Sieber1, Lennart Guth1, Jan-Hendrik Oelmann1, Tobias Heldt1, Prachi Nagpal1, Nick Lackmann1, Simon Angstenberger1, Stepan Kokh1, Hannah Unold1, Lukas Matt1, Janko Nauta2, Thomas Pfeifer1, and José R. Crespo López-Urrutia1 — 1Max-Planck-Institut for Nuclear Physics, Heidelberg, Germany — 2Department of Physics, Swansea University, Singleton Park, SA2, United Kingdom
To conduct precision spectroscopy beyond the optical regime, we transfer a near-infrared frequency comb with 100 MHz repetition rate via high harmonic generation to the Extreme-Ultraviolet [1]. We aim to increase the yield of the harmonics by further compressing the 80 W pulses in a Herriott-type Multi-Pass Cell (MPC). In the MPC the pulses are focused into a nonlinear medium where they undergo self-phase modulation. Multiple passes stepwise broaden the spectrum implying a decreased fourier transform limit for the pulse duration [2]. Using a post-compression set-up with chirped mirrors, we decreased our pulse length of 200 fs to 100 fs. A Frequency-Resolved Optical Gating set-up is used to evaluate the pulse shape and duration.
[1] J. Nauta et al., Optics Express, Vol. 29, No. 2, 2624 (2018)
[2] A.-L. Viotti et al., Optica, Vol. 9, No. 2, 197 (2022)
Keywords: Precision Spectroscopy; Multi-Pass Cell; Pulse Compression; Frequency Comb; Frequency-Resolved Optical Gating