Optical transmission of frequency-coded quantum bits with WDM synchronization

T. Ferreira da Silva, J. P. von der Weid

Abstract


Quantum key distribution enables absolutely secure communication between two parties, making them able to share a secret that will be used in the posterior message encryption. Here we shall report the experimental implementation of an optical qubits transmission system compatible with BB84-based protocols. The photonic qubits preparation and measurement are performed by a double-modulation process according with the relative phase of a WDM carried synchronized radiofrequency signal, in the way that the quantum states are coded in the optical sidebands. A filtering scheme is applied to the further sidebands selection, delivering the qubits to single-photon detectors.

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References


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