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Resource Planning and Bandwidth Allocation in Hybrid Fiber-Coax Residential Networks



David W. Griffith, Kotikalapudi Sriram, L Krivulina, Nada T. Golmie


We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled by a pair of custom data handling circuit boards. As a complete system using a clock rate of 1.25 Gbit/s, it produces sifted keys at a rate of 1.1 Mb/s with an error rate lower than 1.3% while operating at a transmission rate of 312.5 Mbit/s and a mean photon number 5 = 0.1. With a number of proposed improvements this system has a potential for a higher key rate without an elevated error rate.
Optical Switching Networks


Griffith, D. , Sriram, K. , Krivulina, L. and Golmie, N. (2005), Resource Planning and Bandwidth Allocation in Hybrid Fiber-Coax Residential Networks, Optical Switching Networks, [online], (Accessed April 18, 2024)
Created September 30, 2005, Updated October 12, 2021