General Purpose Calculator for Outdoor Propagation Loss
Leonard E. Miller, Camillo Gentile, D Kaspar
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.
, Gentile, C.
and Kaspar, D.
General Purpose Calculator for Outdoor Propagation Loss, Advanced Network Technologies Division, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=150163
(Accessed June 3, 2023)