Quantum key distribution with integrated optics
Mirko Lobino, Pei Zhang, Enrique Martín-López, Richard Nock, Damien Bonneau, Hongwei Li, A. O. Niskanen, Jeremy L. O’Brien, Anthony Laing, Kanin Aungskunsiri, Joachim Wabnig, Jack Munns, Pisu Jiang, John Rarity, Mark G. Thompson · 2014
We report on a quantum key distribution (QKD) experiment where a client with an on-chip polarisation rotator can access a server through a telecom-fibre link. Large resources such as photon source and detectors are situated at server-side. We employ a reference frame independent QKD protocol for polarisation qubits and show that it overcomes detrimental effects of drifting fibre birefringence in a polarisation maintaining fibre.