Ramsey spectroscopy of high-contrast CPT resonances with push-pull optical pumping in Cs vapor

X. Liu, J-M. Mérolla, S. Guérandel, E. de Clercq, R. Boudot
2013 Optics Express  
We report 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
more » ... y 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.
doi:10.1364/oe.21.012451 pmid:23736464 fatcat:zqebrv2jujdm7o7b4jtj3b3xia