16 QAM Quantum Noise Stream Cipher Coherent Transmission Over 300 km Without Intermediate Amplifier
Chao Lei, Jie Zhang, Yajie Li, Yongli Zhao, Kai Wang, Shoudong Liu, Bo Wang, Hang Gao, Junjia Li
Abstract
This letter first reports a digital coherent quantum noise stream cipher (QNSC) experiment over 300km fiber without intermediate amplifiers. With the help of Raman fiber amplifiers, ultra-low loss fiber, and the optimized fuzzy C-means clustering algorithm, the results show the system can carry 10.2 Tbit/ s·km data, which is significantly improved in the single polarization and single wavelength digital coherent context without intermediate amplifiers. We further analyze the transmission and security performances under the 16 quadrature amplitude modulation (QAM) scenario in detail. The number of masked signals of 16 QAM/QNSC is 3843.2.
Topics & Concepts
Quadrature amplitude modulationQAMComputer scienceElectronic engineeringOpticsOptoelectronicsPhysicsTelecommunicationsBit error rateEngineeringChannel (broadcasting)Optical Network TechnologiesAdvanced Photonic Communication SystemsQuantum Information and Cryptography