Backscattering limitation for fiber-optic quantum key distribution systems

Subacius, Darius; Zavriyev, Anton; Trifonov, Alexei
January 2005
Applied Physics Letters;1/3/2005, Vol. 86 Issue 1, p011103
Academic Journal
We characterized backscattering effects in optical fiber using a photon counting technique and considered its implications for quantum key distribution (QKD). We found that Rayleigh (elastic) backscattering can put strong limitations on a two-way QKD system’s performance. Raman (inelastic) scattering can restrict the ability of wavelength multiplexing of a quantum channel with strong classical data channel(s).


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