Mark Plimmer, Thomas Badr, Stephane Guerandel, Yann Louyer, Sylvestre Challemel du Rozier, Patrick Juncar, Marc Himbert, Joshua Silver, Francois Biraben, Francois Nez, Gaetan Hagel
We report advances towards the development of frequency standards based on narrow two-photon transitions in the silver atom at 576 and 661 nm from the ground 4d105s2S1/2 state to the 2D3/2,5/2 levels of the configuration 4d95s2. We describe detection schemes for metastable atoms, localisation of the position of the metastable 2D5/2 level and diode-pumped Nd:YLF lasers around 1.3 μm destined to replace dye lasers for both cooling and spectroscopy of the clock transition. Our result for the position of the 2D5/2 level is more than a factor of two improvement over previous vales.
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