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Calibration of an Astrophysical Spectrograph below 1 m/s using a Laser Frequency Comb



David F. Phillips, Alexander G. Glenday, Chih-hao Li, Claire E. Cramer, Gabor Furesz, Guoquing Chang, Andrew Benedick, Li-Jin Chen, F X. Kaertner, Sylvain G. Korzennik, Dimitar Sasselov, Andrew Szentgyorgyi, Ronald L. Walsworth


We deployed two wavelength calibrators based on laser frequency combs ("astro-combs") at an astronomical observatory. One astro-comb operated over a 100 nm band in the deep red ( 800 nm) and a second operated over a 20 nm band in the blue ( 400 nm). We used these red and blue astro-combs to calibrate a high-resolution astrophysical spectrograph integrated with a 1.5 m telescope, and demonstrated calibration precision and stability sufficient to enable detection of changes in stellar radial velocity < 1 m/s.
Optics Express


Phillips, D. , Glenday, A. , Li, C. , Cramer, C. , Furesz, G. , Chang, G. , Benedick, A. , Chen, L. , Kaertner, F. , Korzennik, S. , Sasselov, D. , Szentgyorgyi, A. and Walsworth, R. (2012), Calibration of an Astrophysical Spectrograph below 1 m/s using a Laser Frequency Comb, Optics Express (Accessed May 24, 2024)


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Created June 3, 2012, Updated October 12, 2021