title: Detection of ultrahigh resonance contrast in vapor-cell atomic clocks.
abstract: We propose and demonstrate a novel detection scheme of clock signals and obtain an ultrahigh resonance contrast up to 90%, which leads to the remarkable improvement of the precision of the signal-to-noise ratio. The frequency stability in terms of Allan deviation of the proposed detection scheme is improved by an order of magnitude under equivalent conditions.
authors.affiliation: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Jinda
authors.initials: J
authors.lastname: Lin
authors.forename: Jianliao
authors.initials: J
authors.lastname: Deng
authors.forename: Yisheng
authors.initials: Y
authors.lastname: Ma
authors.forename: Huijuan
authors.initials: H
authors.lastname: He
authors.forename: Yuzhu
authors.initials: Y
authors.lastname: Wang