24 September 2012 Calibration of an echelle spectrograph with an astro-comb: a laser frequency comb with very high repetition rate
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Abstract
Searches for extrasolar planets using precision radial velocity (PRV) techniques are approaching Earth-like planet sensitivity, however require an improvement of one order of magnitude to identify earth-mass planets in the habitable zone of sun-like stars. A key limitation is spectrograph calibration. An astro-comb, an octave-spanning laser frequency comb and a Fabry-Pérot cavity, producing evenly spaced frequencies with large wavelength coverage, is a promising tool for improved wavelength calibration. We demonstrate the calibration of a high-resolution astrophysical spectrograph below the 1 m/s level in the 8000-9000 Å and 4200 Å spectral bands.
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David F. Phillips, David F. Phillips, Alex Glenday, Alex Glenday, Chih-Hao Li, Chih-Hao Li, Gabor Furesz, Gabor Furesz, Andrew J. Benedick, Andrew J. Benedick, Guoqing Noah Chang, Guoqing Noah Chang, Li-Jin Chen, Li-Jin Chen, Sylvain Korzennik, Sylvain Korzennik, Dimitar Sasselov, Dimitar Sasselov, Franz X. Kaertner, Franz X. Kaertner, Andrew Szentgyorgyi, Andrew Szentgyorgyi, Ronald L. Walsworth, Ronald L. Walsworth, } "Calibration of an echelle spectrograph with an astro-comb: a laser frequency comb with very high repetition rate", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84468O (24 September 2012); doi: 10.1117/12.926465; https://doi.org/10.1117/12.926465
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