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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6631–6643

Demonstration of on-sky calibration of astronomical spectra using a 25 GHz near-IR laser frequency comb

Gabriel G. Ycas, Franklyn Quinlan, Scott A. Diddams, Steve Osterman, Suvrath Mahadevan, Stephen Redman, Ryan Terrien, Lawrence Ramsey, Chad F. Bender, Brandon Botzer, and Steinn Sigurdsson  »View Author Affiliations


Optics Express, Vol. 20, Issue 6, pp. 6631-6643 (2012)
http://dx.doi.org/10.1364/OE.20.006631


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Abstract

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 ∼10 m/s (∼6 MHz) was achieved from the comb-calibrated spectra.

© 2012 OSA

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(300.6340) Spectroscopy : Spectroscopy, infrared
(350.1270) Other areas of optics : Astronomy and astrophysics

ToC Category:
Nonlinear Optics

History
Original Manuscript: January 23, 2012
Revised Manuscript: February 27, 2012
Manuscript Accepted: February 28, 2012
Published: March 6, 2012

Virtual Issues
April 13, 2012 Spotlight on Optics

Citation
Gabriel G. Ycas, Franklyn Quinlan, Scott A. Diddams, Steve Osterman, Suvrath Mahadevan, Stephen Redman, Ryan Terrien, Lawrence Ramsey, Chad F. Bender, Brandon Botzer, and Steinn Sigurdsson, "Demonstration of on-sky calibration of astronomical spectra using a 25 GHz near-IR laser frequency comb," Opt. Express 20, 6631-6643 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-6-6631


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