1,000-km Transmission of 1.5-Gb/s Y-00 Quantum Stream Cipher using 4096-level Intensity Modulation Signals

A real-time 1.5-Gb/s Y-00 quantum stream cipher transmission for secure optical communication is experimentally demonstrated. An error-free $(\text{BER} transmission of 4096-level intensity-modulation cipher signals is achieved in a dispersion-managed link over 1,000 km. © 2019 The Author(s)