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arXiv · 1305.7321

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

Xiaochi Liu·Jean-Marc Mérolla·Stéphane Guérandel·Emeric de Clercq·Rodolphe Boudot
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Abstract

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 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.

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Xiaochi Liu, Jean-Marc Mérolla, Stéphane Guérandel, Emeric de Clercq, Rodolphe Boudot. 2013-05-31. Ramsey spectroscopy of high-contrast CPT resonances with push-pull optical pumping in Cs vapor. https://doi.org/10.1364/oe.21.012451

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