High Speed Quantum Key Distribution System
Akio Tajima, Akihiro Tanaka, Seigo Takahashi, K. Yoshino, Yoshihiro Nambu · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2010
Quantum key distribution (QKD) systems can generate unconditionally secure common keys between remote users. Improvements of QKD performance, particularly in key generation rate, have been required to meet current network traffic. A high-speed QKD system should be equipped with low-loss receivers with high visibility, highly efficient photon detectors with small dark count probability. A solution to these issues is to employ planar lightwave circuit (PLC) interferometers, single photon detection circuits and modules, together with multi-wavelength channels transmission using wavelength division multiplexing (WDM) technique.