1.
Opt Express
; 20(6): 6631-43, 2012 Mar 12.
Artigo
em Inglês
| MEDLINE
| ID: mdl-22418547
RESUMO
We describe and characterize a 25 GHz laser frequency comb based on a cavity-filtered erbium fiber mode-locked laser. The comb provides a uniform array of optical frequencies spanning 1450 nm to 1700 nm, and is stabilized by use of a global positioning system referenced atomic clock. This comb was deployed at the 9.2 m Hobby-Eberly telescope at the McDonald Observatory where it was used as a radial velocity calibration source for the fiber-fed Pathfinder near-infrared spectrograph. Stellar targets were observed in three echelle orders over four nights, and radial velocity precision of â¼10 m/s (â¼6 MHz) was achieved from the comb-calibrated spectra.