Liu X, Mérolla J-M, Guérandel S, de Clercq E, Boudot R
FEMTO-ST, CNRS, 26 chemin de l’Epitaphe 25030 Besancon Cedex, France.
Opt Express. 2013 May 20;21(10):12451-9. doi: 10.1364/OE.21.012451.
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.
我们报告了使用简单架构的激光系统在铯蒸汽池中检测到高对比度和窄相干布居囚禁（CPT）拉姆齐条纹。该激光系统允许将推挽光泵浦（PPOP）和类似拉姆齐的时间脉冲询问相结合。光学组件的一个独特之处是使用单个马赫-曾德尔电光调制器（MZ EOM）来产生光学边带以及作为脉冲相互作用的光开关。在厘米尺度的充有缓冲气体的铯蒸汽池中检测到了典型的拉姆齐条纹，其线宽为166 Hz，对比度为33%。这种技术对于基于CPT的高性能、低功耗紧凑型蒸汽池时钟的开发可能具有重要意义。
