title: High-resolution spectroscopy with a femtosecond laser frequency comb.
abstract: The output of a mode-locked femtosecond laser is used for precision single-photon spectroscopy of 133Cs in an atomic beam. By changing the laser's repetition rate, the cesium D1 (6s 2S(1/2)-->6p 2P(1/2)) and D2 (6s 2S(1/2)-->6p 2P(3/2)) transitions are detected and the optical frequencies are measured with accuracy similar to that obtained with a cw laser. Control of the femtosecond laser repetition rate by use of the atomic fluorescence is also implemented, thus realizing a simple cesium optical clock.
authors.affiliation: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556-5670, USA. vgergino@nd.edu
authors.forename: V
authors.initials: V
authors.lastname: Gerginov
authors.forename: C E
authors.initials: CE
authors.lastname: Tanner
authors.forename: S A
authors.initials: SA
authors.lastname: Diddams
authors.forename: A
authors.initials: A
authors.lastname: Bartels
authors.forename: L
authors.initials: L
authors.lastname: Hollberg