Fig. 1: Overview of the key distribution scheme using mode-shift keying chaos synchronization. | Light: Science & Applications

Fig. 1: Overview of the key distribution scheme using mode-shift keying chaos synchronization.

From: 0.75 Gbit/s high-speed classical key distribution with mode-shift keying chaos synchronization of Fabry–Perot lasers

Fig. 1

a Principle and b experimental system configuration. Common-light-driven multi-mode Fabry–Perot (FP) lasers with dynamic filtering achieve the mode-shift keying chaos synchronization. The red bits obtained by quantizing synchronized chaos in the mode-matching time intervals are sifted as the final keys. In the experimental configuration, dynamic filtering consists of a wavelength division multiplexer (WDM) followed by parallel on/off modulation by random binary control codes CA (CB) and corresponding inverse codes.

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