Coherent Population Trapping Resonances in Buffer Gas-filled Cs Vapor Cells with Push-Pull Optical Pumping
| Autor: | Liu, Xiaochi, Mérolla, Jean-Marc, Guérandel, Stéphane, Gorecki, Christophe, de Clercq, Emeric, Boudot, Rodolphe |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | from Phys. Rev. A 87, 013416 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.87.013416 |
| Popis: | We report on a theoretical study and experimental characterization of coherent population trapping (CPT) resonances in buffer gas-filled vapor cells with push-pull optical pumping (PPOP) on Cs D1 line. We point out that the push-pull interaction scheme is identical to the so-called lin per lin polarization scheme. Expressions of the relevant dark states, as well as of absorption, are reported. The experimental setup is based on the combination of a distributed feedback (DFB) diode laser, a pigtailed intensity Mach-Zehnder electro-optic modulator (MZ EOM) for optical sidebands generation and a Michelson-like interferometer. A microwave technique to stabilize the transfer function operating point of the MZ EOM is implemented for proper operation. A CPT resonance contrast as high as 78% is reported in a cm-scale cell for the magnetic-field insensitive clock transition. The impact of the laser intensity on the CPT clock signal key parameters (linewidth - contrast - linewidth/contrast ratio) is reported for three different cells with various dimensions and buffer gas contents. The potential of the PPOP technique for the development of high-performance atomic vapor cell clocks is discussed. Comment: 28 pages, 12 figures |
| Databáze: | arXiv |
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