Field Trial of 7 × 89λ × 256 Gb/s C-Band Classical / CVQKD Co-Existence Transmission over 7-Core Fiber

We successfully demonstrated the coexistence of CV-QKD and 89 classical channels separated by 1 nm in C-band transmitted over a 16.7 km field deployed 7-core fiber, achieving 35 Mb/s secure key rate with 22.8 Tb/s classical data per core.