Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides

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dc.contributor.authorLudwig, Markus
dc.contributor.authorAyhan, Furkan
dc.contributor.authorSchmidt, Tobias M.
dc.contributor.authorWildi, Thibault
dc.contributor.authorVoumard, Thibault
dc.contributor.authorBlum, Roman
dc.contributor.authorYe, Zhichao
dc.contributor.authorLei, Fuchuan
dc.contributor.authorWildi, François
dc.contributor.authorPepe, Francesco
dc.contributor.authorGaafar, Mahmoud A.
dc.contributor.authorObrzud, Ewelina
dc.contributor.authorGrassani, Davide
dc.contributor.authorHefti, Olivia
dc.contributor.authorKarlen, Sylvain
dc.contributor.authorLecomte, Steve
dc.contributor.authorMoreau, François
dc.contributor.authorChazelas, Bruno
dc.contributor.authorSottile, Rico
dc.contributor.authorTorres-Company, Victor
dc.contributor.authorBrasch, Victor
dc.contributor.authorVillanueva, Luis G.
dc.contributor.authorBouchy, François
dc.contributor.authorHerr, Tobias
dc.date.accessioned2024-10-01T19:56:12Z
dc.date.available2024-10-01T19:56:12Z
dc.date.issued2024-09-02
dc.description.abstractAstronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants on cosmological scales. Laser frequency combs can provide the required accurate and precise calibration to the astronomical spectrographs. For cosmological studies, extending the calibration with such astrocombs to the ultraviolet spectral range is desirable, however, strong material dispersion and large spectral separation from the established infrared laser oscillators have made this challenging. Here, we demonstrate astronomical spectrograph calibration with an astrocomb in the ultraviolet spectral range below 400 nm. This is accomplished via chip-integrated highly nonlinear photonics in periodically-poled, nano-fabricated lithium niobate waveguides in conjunction with a robust infrared electro-optic comb generator, as well as a chip-integrated microresonator comb. These results demonstrate a viable route towards astronomical precision spectroscopy in the ultraviolet and could contribute to unlock the full potential of next-generation ground-based and future space-based instruments.
dc.description.sponsorshipSwiss National Science Foundation (Sinergia BLUVES CRSII5_193689) European Research Council (ERC) under the EU’s Horizon 2020 research and innovation program (ERC StG 853564) ERC CoG 771410
dc.identifier.citationNature Communications, vol. 15 (1), pp. 7614
dc.identifier.doi10.1038/s41467-024-51560-x
dc.identifier.issn2041-1723
dc.identifier.pii10.1038/s41467-024-51560-x
dc.identifier.pmid39223131
dc.identifier.urihttps://hdl.handle.net/20.500.12839/1517
dc.identifier.urlhttps://doi.org/10.1038/s41467-024-51560-x
dc.language.isoen
dc.rights© 2024. The Author(s).
dc.source.beginpage7614
dc.source.countryEngland
dc.source.issue1
dc.source.journaltitleNature communications
dc.source.volume15
dc.titleUltraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides
dc.typeJournal Article
dc.type.csemdivisionsBU-I
dc.type.csemresearchareasPhotonics
dc.type.csemresearchareasScientific Instrumentation
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