Two-Way Photonic Interface for Linking the Sr+ Transition at 422 nm to the Telecommunication C Band

Thomas A. Wright, Robert J.A. Francis-Jones, Corin B.E. Gawith, Jonas N. Becker, Patrick M. Ledingham, Peter G.R. Smith, Joshua Nunn, Peter J. Mosley, Benjamin Brecht, Ian A. Walmsley

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We report a single-stage bidirectional 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 telecom 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.

Original languageEnglish
Article number044012
Pages (from-to)1-8
Number of pages8
JournalPhysical Review Applied
Issue number4
Early online date4 Oct 2018
Publication statusPublished - 31 Oct 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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