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A Single-channel 40 Gbit/s Digital Coherent QAM Quantum Stream Cipher Transmission over 480 km

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Abstract

We demonstrate a single-channel 40-Gbit/s QAM quantum stream cipher transmission over 480-km. By using a multi-bit encoded scheme and digital coherent transmission techniques, record data capacity and transmission distance of secure optical communication have been successfully realized.

© 2014 Optical Society of America

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