Broadband near-infrared astronomical spectrometer calibration and on-sky validation with an electro-optic laser frequency comb

被引：30

作者：

Obrzud, E. ^{[1
,2
]}

Rainer, M. ^{[3
]}

Harutyunyan, A. ^{[4
]}

Chazelas, B. ^{[2
]}

Cecconi, M. ^{[4
]}

Ghedina, A. ^{[4
]}

Molinari, E. ^{[4
]}

Kundermann, S. ^{[1
]}

Lecomte, S. ^{[1
]}

Pepe, F. ^{[2
]}

Wildi, F. ^{[2
]}

Bouchy, F. ^{[2
]}

Herr, T. ^{[1
]}

机构：

[1] Swiss Ctr Elect & Microtechnol CSEM, Rue Observ 58, CH-2000 Neuchatel, Switzerland

[2] Univ Geneva, Geneva Observ, Chemin Maillettes 51, CH-12901 Versoix, Switzerland

[3] Natl Inst Astrophys INAF, Astron Observ Brera, Via Brera 28, I-20121 Milan, Italy

[4] INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 26期

基金：

瑞士国家科学基金会;

关键词：

HIGH-RESOLUTION; WAVELENGTH CALIBRATION; PHASE-CONTROL; ASTRO-COMB; GENERATION; NOISE; SPECTROGRAPH; PRECISION; SPECTRA;

D O I：

10.1364/OE.26.034830

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The quest for extrasolar planets and their characterization 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-fiber, 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. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：34830 / 34841

页数：12

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