Obrzud, E.E.ObrzudRAINER, MonicaMonicaRAINERHarutyunyan, A.A.HarutyunyanChazelas, B.B.ChazelasCecconi, M.M.CecconiGhedina, A.A.GhedinaMOLINARI, Emilio CarloEmilio CarloMOLINARIKundermann, S.S.KundermannLecomte, S.S.LecomtePepe, F.F.PepeWildi, F.F.WildiBouchy, F.F.BouchyHerr, T.T.Herr2020-10-142020-10-1420181094-4087http://hdl.handle.net/20.500.12386/27818The quest for extrasolar planets and their characterisation as well as studies of fundamental physics on cosmological scales rely on capabilities of high-resolution astronomical spectroscopy. A central requirement is a precise wavelength calibration of astronomical spectrographs allowing for extraction of subtle wavelength shifts from the spectra of stars and quasars. Here, we present an all-fibre, 400 nm wide near-infrared frequency comb based on electro-optic modulation with 14.5 GHz comb line spacing. Tests on the high-resolution, near-infrared spectrometer GIANO-B show a photon-noise limited calibration precision of <10 cm/s as required for Earth-like planet detection. Moreover, the presented comb provides detailed insight into particularities of the spectrograph such as detector inhomogeneities and differential spectrograph drifts. The system is validated in on-sky observations of a radial velocity standard star (HD221354) and telluric atmospheric absorption features. The advantages of the system include simplicity, robustness and turn-key operation, features that are valuable at the observation sites.ELETTRONICOenArticle10.1364/OE.26.0348302-s2.0-85059210549000454149000114https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-26-348302018OExpr..2634830OFIS/05 - ASTRONOMIA E ASTROFISICA