Two-Way Photonic Interface for Linking the <mml:math xmlns:mml="http://www..org/1998/Math/MathML" display="inline" overflow="scroll"><mml:msup><mml:mi>Sr</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> Transition at 422 nm to the Telecommunication <mml:math xmlns:mml="http://www..org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>C</mml:mi></mml:math> Band
T.A. Wright, R.J.A. Francis-Jones, C.B.E. Gawith, J.N. Becker, P.M. Ledingham, P.G.R. Smith, J. Nunn, P.J. Mosley, B. Brecht, I.A. Walmsley, Physical Review Applied 10 (2018).