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Proceedings Paper

Calibration of an echelle spectrograph with an astro-comb: a laser frequency comb with very high repetition rate
Author(s): David F. Phillips; Alex Glenday; Chih-Hao Li; Gabor Furesz; Andrew J. Benedick; Guoqing Noah Chang; Li-Jin Chen; Sylvain Korzennik; Dimitar Sasselov; Franz X. Kaertner; Andrew Szentgyorgyi; Ronald L. Walsworth
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Paper 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.

Paper Details

Date Published: 24 September 2012
PDF: 10 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84468O (24 September 2012); doi: 10.1117/12.926465
Show Author Affiliations
David F. Phillips, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Alex Glenday, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Chih-Hao Li, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Gabor Furesz, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Andrew J. Benedick, Massachusetts Institute of Technology (United States)
Guoqing Noah Chang, Massachusetts Institute of Technology (United States)
Li-Jin Chen, Massachusetts Institute of Technology (United States)
Sylvain Korzennik, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Dimitar Sasselov, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Franz X. Kaertner, Hamburg Univ. and DESY (Germany)
Andrew Szentgyorgyi, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Ronald L. Walsworth, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Harvard Univ. (United States)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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