Long Range Secure Key Distribution Over Multiple Amplified Fiber Spans Based on Environmental Instabilities
Ben Wu, Yue-Kai Huang, Shaoliang Zhang, Bhavin J. Shastri, Paul R. Prucnal · Conference on Lasers and Electro-Optics · 2016
Using environmental instability induced signal phase fluctuation, we demonstrated a secure key distribution system over a 240-km bidirectional fiber-pair link. The scheme is compatible with commercial WDM systems and optical amplifiers for long-range transmissions.