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 14751625 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
Pub Type: Journals
Astronomy and astrophysics, Infrared Spectroscopy, Laser frequency combs, Ultrafast nonlinear optics