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Publication Citation: Demonstration of on-sky calibration of astronomical spectra using a 20 GHz near-IR laser frequency comb

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Author(s): Gabriel G. Ycas; Franklyn J. Quinlan; Scott A. Diddams; Steve Osterman; Chad F. Bender; Brandon Botzer; Lawrence W. Ramsey; Ryan Terrien; Suvrath Mahadevan; Stephen L. Redman;
Title: Demonstration of on-sky calibration of astronomical spectra using a 20 GHz near-IR laser frequency comb
Published: March 06, 2012
Abstract: We describe and characterize a 25 GHz laser frequency comb based on a cavity-filtered erbium fiber mode-locked laser that provides a uniform array of optical frequencies stabilized using the GPS-system atomic clocks spanning 1475‹1625 nm. This comb was transported to the Hobby-Eberly telescope at the McDonald observatory where it was used to calibrate the Pathfinder near-infrared spectrograph. Stellar targets were observed in 3 echelle orders over 4 nights.
Citation: Optics Express
Volume: 20
Issue: 6
Pages: pp. 6631 - 6643
Keywords: Astronomy and astrophysics;Infrared Spectroscopy;Laser frequency combs;Ultrafast nonlinear optics
Research Areas: Physics