title: Two-beam nonlinear Kerr effect to stabilize laser frequency with sub-Doppler resolution.
abstract: Avoiding laser frequency drifts is a key issue in many atomic physics experiments. Several techniques have been developed to lock the laser frequency using sub-Doppler dispersive atomic lineshapes as error signals in a feedback loop. We propose here a two-beam technique that uses nonlinear properties of an atomic vapor around sharp resonances to produce sub-Doppler dispersivelike lineshapes that can be used as error signals. Our simple and robust technique has the advantage of not needing either modulation or magnetic fields.
authors.affiliation: Laboratório de Espectroscopia Ótica, DF-CCEN, Universidade Federal da Paraíba, João Pessoa-PB, Brazil.
authors.forename: Weliton Soares
authors.initials: WS
authors.lastname: Martins
authors.forename: Hugo L D de S
authors.initials: HL
authors.lastname: Cavalcante
authors.forename: Thierry
authors.initials: T
authors.lastname: Passerat de Silans
authors.forename: Marcos
authors.initials: M
authors.lastname: Oriá
authors.forename: Martine
authors.initials: M
authors.lastname: Chevrollier