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20 June 2024 Astronomical spectrograph calibration with ultraviolet astrocombs
Furkan Ayhan, Markus Ludwig, Tobias M. Schmidt, Thibault Wildi, Thibault Voumard, Roman Blum, Zhichao Ye, Fuchuan Lei, François Wildi, Francesco Pepe, Mahmoud A. Gaafar, Ewelina Obrzud, Davide Grassani, François Moreau, Bruno Chazelas, Rico Sottile, Victor Torres-Company, Victor Brasch, Luis G. Villanueva, François Bouchy, Tobias Herr
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Proceedings Volume PC13004, Nonlinear Optics and its Applications 2024; PC130040N (2024) https://doi.org/10.1117/12.3022133
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Precision astronomical spectroscopy is vital for seeking life beyond Earth and often relies on detecting very small wavelength shifts over years. Precision of these instruments are ensured by regular wavelength calibration and laser frequency combs stabilized with frequency standards have recently emerged as suitable sources. In this work, we demonstrate wavelength calibration of an astronomical spectrograph in ultraviolet spectrum below 400 nm. This is achieved using second- and third- order nonlinear effects in thin-film, periodically poled lithium niobate waveguides with an infrared electro-optic comb generator at 18 GHz.
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Furkan Ayhan, Markus Ludwig, Tobias M. Schmidt, Thibault Wildi, Thibault Voumard, Roman Blum, Zhichao Ye, Fuchuan Lei, François Wildi, Francesco Pepe, Mahmoud A. Gaafar, Ewelina Obrzud, Davide Grassani, François Moreau, Bruno Chazelas, Rico Sottile, Victor Torres-Company, Victor Brasch, Luis G. Villanueva, François Bouchy, and Tobias Herr "Astronomical spectrograph calibration with ultraviolet astrocombs", Proc. SPIE PC13004, Nonlinear Optics and its Applications 2024, PC130040N (20 June 2024); https://doi.org/10.1117/12.3022133
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KEYWORDS
Calibration
Spectrographs
Ultraviolet radiation
Astronomy
Laser frequency
Continuous wave operation
Dispersion
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