Scientific Results

Ultimate Limit in the Spectral Resolution of Extreme Ultraviolet Frequency Combs

Year: 2017

Authors: Corsi C., Liontos I., Bellini M., Cavalieri S., Cancio P.P., Siciliani de Cumis M., Eramo R.

Autors Affiliation: European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, Sesto Fiorentino, Firenze, I-50019, Italy; Dipartimento di Fisica e Astronomia, Università di Firenze, Via G. Sansone 1, Sesto Fiorentino, Firenze, I-50019, Italy; Istituto Nazionale di Ottica (INO-CNR), Largo E. Fermi 6, Firenze, I-50125, Italy; Agenzia Spaziale Italiana (ASI), Contrada Terlecchia, Matera, I-75100, Italy; Attosecond Science Laboratory, King Saud University, Riyadh, 11451, Saudi Arabia

Abstract: We present the results of direct interferometric measurements on the pulse-to-pulse phase jitter of a metrological, fiber-based, infrared (IR) frequency comb. We show that the short-time evolution of such phase fluctuations, which cannot be actively controlled by any feedback system, imposes a stringent limit on the tooth linewidth of extreme ultraviolet (XUV) combs produced by high-order harmonic conversion, thus explaining the difference of 9 orders of magnitude between the coherence times of state-of-the-art IR and XUV frequency combs.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 118 (14)      Pages from: 143201  to: 143201

More Information: This work was partially supported by LASERLAB-EUROPE (EU-H2020 654148). We gratefully acknowledge the skillful work of R. Ballerini and A. Hajeb, who designed and realized the vacuum chamber and the interferometer mechanical assembly. We also thank M. Giuntini, M. De Pas, and A. Montori for their assistance in the setup of the electronics.
KeyWords: Atomic physics; Physics, Extreme Ultraviolet; Extreme ultraviolets; Feedback systems; High order harmonics; Interferometric measurement; Orders of magnitude; Phase fluctuation; State of the art, Jitter
DOI: 10.1103/PhysRevLett.118.143201

Citations: 2
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