Journal Article

PUBDB-2024-05459

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides

Ludwig, M.CFEL*DESY* ; Ayhan, F. ; Schmidt, T. M. ; Wildi, T.CFEL*DESY* ; Voumard, T.CFEL*Extern* ; Blum, R. ; Ye, Z. ; Lei, F. ; Wildi, F. ; Pepe, F. ; Gaafar, M. A.Extern* ; Obrzud, E. ; Grassani, D. ; Moreau, F. ; Chazelas, B. ; Sottile, R. ; Torres-Company, V. ; Brasch, V. ; Villanueva, L. G. ; Bouchy, F. ; Herr, T. (Corresponding author)CFEL*DESY*

2024
Nature Publishing Group UK [London]

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Please use a persistent id in citations: doi:10.1038/s41467-024-51560-x  doi:10.3204/PUBDB-2024-05459

Abstract: Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants across cosmological scales. Laser frequency combs can provide the critically required accurate and precise calibration to the astronomical spectrographs. For cosmological studies, extending the calibration with such astrocombs to the ultraviolet spectral range is highly desirable, however, strong material dispersion and large spectral separation from the established infrared laser oscillators have made this exceedingly challenging. Here, we demonstrate for the first time astronomical spectrograph calibrations 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 may contribute to unlocking the full potential of next generation ground- and future space-based astronomical instruments.

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Contributing Institute(s):

1. FS-CFEL-2-UMP (FS-CFEL-2-UMP)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. STARCHIP - Microphotonics-based frequency combs for habitable exoplanet detection (853564) (853564)
3. VH-NG-1404 - Ultra-fast nonlinear microphotonics (G:(DE-HGF)2019_VH-NG-1404) (G:(DE-HGF)2019_VH-NG-1404)
4. DarkComb - Dark-Soliton Engineering in Microresonator Frequency Combs (771410) (771410)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2024

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Ludwig, M.CFEL*DESY* ; Ayhan, F. ; Schmidt, T. M. ; Wildi, T.CFEL*DESY* ; Voumard, T.CFEL*DESY* ; Blum, R. ; Ye, Z. ; Lei, F. ; Wildi, F. ; Pepe, F. ; Gaafar, M. A.CFEL*DESY* ; Obrzud, E. ; Grassani, D. ; Moreau, F. ; Chazelas, B. ; Sottile, R. ; Torres-Company, V. ; Brasch, V. ; Villanueva, L. G. ; Bouchy, F. ; Herr, T. (Corresponding author)CFEL*DESY*
Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic waveguides
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