Figure 3
From: Ultra-high bandwidth quantum secured data transmission
High bandwidth experimental simulation.
(a) Eight continuous wave (CW) optical transceivers are wavelength multiplexed with the original two 100 G transceivers. Each transceiver operates on a separate wavelength of the 50 GHz DWDM grid spanning 1529.55 nm → 1533.07 nm. The optical launch power of each transceiver is set using a variable optical attenuator (VOA) to −25.5 dBm. (b) Secure bit rate as a function of time for 18 hours of continuous operation in the presence of 10 classical data channels representing 1 Tbps of data traffic over the same fibre (blue circles). The corresponding quantum bit error rate (blue triangles) is also shown. Inset: Data bandwidth dependence of the secure bit rate and QBER from 0.1 → 1 Tbps. Solid and dashed lines are results from numerical simulation.
