Demonstration of Quantum Channel Monitoring via Quantum Wrappers

Abstract

We experimentally demonstrate quantum channel monitoring by wavelength-time multiplexing of classical wrapper bits with quantum payloads. Bit-error-rate measurements of 5 Gb/s classical bits infer the coincidence-to-accidental ratio of the quantum channel up to 13.3 dB.

Quantum Wrapper Networking

“…We performed preliminary point-to-point QW datagram transmission experiments to gain insight into the feasibility of QW networking [15]. Further, we extended the testbed to a three-node network with a single source node connected to two distinct destination nodes via a QWSR node.…”

“…We observed that the CAR of the quantum channel degrades significantly to 2, if we utilize continuous headers due to the limited channel isolation of the demultiplexing WDM device. However, by time-division multiplexing the burst-mode headers and packetized quantum payloads, the CAR recovers to 18 [15]. Further, with a three-node experiment, we also performed a relatively long-distance transmission of 20 km, for two distinct destinations.…”