title: Characterization of light shift below 10(-15) in a cesium fountain frequency standard operated without the use of mechanical shutters.
abstract: We characterize the light shift in the interaction region of a laser-cooled frequency standard and demonstrate an approach for its mitigation without the use of mechanical shutters. The light shift is confirmed to be below 10-15 and expected to be orders of magnitude lower. This technique makes use of a master-slave laser configuration where cutting the injection power to a slave laser causes it to lase at its free-running wavelength, often two or more nanometers off from the atomic resonance.
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA. Daphna.G.Enzer@jpl.nasa.gov
authors.forename: Daphna G
authors.initials: DG
authors.lastname: Enzer
authors.forename: William M
authors.initials: WM
authors.lastname: Klipstein