Experimental Demonstration Of A 4,294,967,296-Qam-Based Y-00 Quantum Stream Cipher Template Carrying 160-Gb/S 16-Qam Signals

We demonstrate a 4,294,967,296-quadrature amplitude modulation (QAM) based Y-00 quantum stream cipher system carrying a 160-Gb/s 16-QAM signal transmitted over 320-km SSMF. The ultra-dense QAM cipher template is realized by an integrated two-segment silicon photonics I/Q modulator. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement