Time-variation measurement of fundamental constant using femtosecond laser frequency combs

Kim, K. (Time and Frequency Division, National Institute of Standards and Technology) ;
Oskay, W.H. (Time and Frequency Division, National Institute of Standards and Technology) ;
Diddams, S.A. (Time and Frequency Division, National Institute of Standards and Technology) ;
Donley, E.A. (Time and Frequency Division, National Institute of Standards and Technology) ;
Fortier, T.M. (Time and Frequency Division, National Institute of Standards and Technology) ;
Heavner, T.P. (Time and Frequency Division, National Institute of Standards and Technology) ;
Hollberg, L. (Time and Frequency Division, National Institute of Standards and Technology) ;
Itano, W.M. (Time and Frequency Division, National Institute of Standards and Technology) ;
Jefferts, S.R. (Time and Frequency Division, National Institute of Standards and Technology) ;
Jensen, M.J. (Time and Frequency Division, National Institute of Standards and Technology) ;
Levi, F. (Time and Frequency Division, National Institute of Standards and Technology) ;
Parker, T.E. (Time and Frequency Division, National Institute of Standards and Technology) ;
Bergquist, J.C. (Time and Frequency Division, National Institute of Standards and Technology)