title: Ramsey spectroscopy of high-contrast CPT resonances with push-pull optical pumping in Cs vapor.
abstract: We report on the detection of high-contrast and narrow Coherent Population Trapping (CPT) Ramsey fringes in a Cs vapor cell using a simple-architecture laser system. The latter allows the combination of push-pull optical pumping (PPOP) and a temporal Ramsey-like pulsed interrogation. An originality of the optics package is the use of a single Mach-Zehnder electro-optic modulator (MZ EOM) both for optical sidebands generation and light switch for pulsed interaction. Typical Ramsey fringes with a linewidth of 166 Hz and a contrast of 33 % are detected in a cm-scale buffer-gas filled Cs vapor cell. This technique could be interesting for the development of high-performance and low power consumption compact vapor cell clocks based on CPT.
authors.affiliation: FEMTO-ST, CNRS, 26 chemin de l’Epitaphe 25030 Besancon Cedex, France.
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: J-M
authors.initials: JM
authors.lastname: Mérolla
authors.forename: S
authors.initials: S
authors.lastname: Guérandel
authors.forename: E
authors.initials: E
authors.lastname: de Clercq
authors.forename: R
authors.initials: R
authors.lastname: Boudot
mesh_terms: D000669:Amplifiers, Electronic; D002586:Cesium / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*
chemical_list: D002586:Cesium