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We examine the applicability of wireless indoor quantum key distribution(QKD) in hybrid quantum-classical networks. We propose practical configurationsthat would enable wireless access to such networks. The proposed setups wouldallow an indoor wireless user, equipped with a QKD-enabled mobile device, tocommunicate securely with a remote party on the other end of the accessnetwork. QKD signals, sent through wireless indoor channels, are combined withclassical ones and sent over shared fiber links to the remote user. Densewavelengthdivision multiplexing would enable the simultaneous transmission ofquantum and classical signals over the same fiber. We consider the adverseeffects of the background noise induced by Raman scattered light on the QKDreceivers due to such an integration. In addition, we consider the loss and thebackground noise that arise from indoor environments. We consider a number ofdiscrete and continuous-variable QKD protocols and study their performance indifferent scenarios.

Quantum-Classical Access Networks with Embedded Optical Wireless Links