Abstract
In the quantum key distribution system, quantum channel is always affected by
spontaneous Raman scattering noise when it transmits with classical channels that
act as synchronization and data channels on a shared fiber. To study the effect of
the noise exactly, the temporal distribution characteristics of the Raman scattering
noise are analyzed theoretically and measured by a single-photon detector. On the
basis of this, a scheme to decrease the noise is proposed.
© 2014 Chinese Optics Letters
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