UV 30 fs laser pulse generation using a multi-pass cell

Ultrashort ultraviolet (UV) pulses are pivotal for resolving ultrafast electron dynamics. However, their efficient generation is strongly impeded by material dispersion and two-photon absorption, in particular, if pulse durations around a few tens of femtoseconds or below are targeted. Here, we pres...

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Bibliographic Details
Published in:Optics letters 2024-07, Vol.49 (13), p.3769
Main Authors: Hariton, Victor, Jiang, Yujiao, Schönberg, Arthur, Seidel, Marcus, Wieland, Marek, Prandolini, Mark J., Hartl, Ingmar, Drescher, Markus, Heyl, Christoph M.
Format: Article
Language:English
Subjects:
Harmonic generations
Photon absorption
Ytterbium
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Summary:Ultrashort ultraviolet (UV) pulses are pivotal for resolving ultrafast electron dynamics. However, their efficient generation is strongly impeded by material dispersion and two-photon absorption, in particular, if pulse durations around a few tens of femtoseconds or below are targeted. Here, we present a new (to our knowledge) approach to ultrashort UV pulse generation: using the fourth-harmonic generation output of a commercial ytterbium laser system delivering 220 fs UV pulses, we implement a multi-pass cell (MPC) providing 5.6 µJ pulses at 256 nm, compressed to 30.5 fs. Our results set a short-wavelength record for MPC post-compression while offering attractive options to navigate the trade-off between upconversion efficiency and acceptance bandwidth for UV pulse production.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.527988