Benedick, Andrew J.Chang, GuoqingBirge, Jonathan R.Chen, Li-JinGlenday, AlexanderLi, Chih-HaoPhillips, DavidSzentgyorgyi, AndrewKorzennik, SylvainFuresz, GaborWalsworth, RonaldKärtner, Franz X.2014-10-142010Benedick, Andrew J., Guoqing Chang, Jonathan R. Birge, Li-Jin Chen, Alexander G. Glenday, Chih-Hao Li, David F. Phillips, et al. 2010. Visible Wavelength Astro-Comb. Optics Express 18, no. 18: 19175-19184.1094-4087http://nrs.harvard.edu/urn-3:HUL.InstRepos:13041032We demonstrate a tunable laser frequency comb operating near 420 nm with mode spacing of 20-50 GHz, usable bandwidth of 15 nm and output power per line of ~20 nW. Using the TRES spectrograph at the Fred Lawrence Whipple Observatory, we characterize this system to an accuracy below 1m/s, suitable for calibrating high-resolution astrophysical spectrographs used, e.g., in exoplanet studies.en-USJournal Article2014-10-1410.1364/oe.18.019175