A two-way photonic interface for linking Sr+ transition at 422 nm to the telecommunications C-band
arXiv:1802.07947 · doi:10.1103/PhysRevApplied.10.044012
Abstract
We report a single-stage bi-directional interface capable of linking Sr+ trapped ion qubits in a long-distance quantum network. Our interface converts photons between the Sr+ emission wavelength at 422 nm and the telecoms C-band to enable low-loss transmission over optical fiber. We have achieved both up- and down-conversion at the single photon level with efficiencies of 9.4% and 1.1% respectively. Furthermore we demonstrate noise levels that are low enough to allow for genuine quantum operation in the future.
arXiv comment5 pages, 4 figures
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