%0 Journal Article
%T One-way Quantum Key Distribution System based on Planar Lightwave Circuits
%A Yoshihiro Nambu
%A Ken'ichiro Yoshino
%A Akihisa Tomita
%J Physics
%D 2006
%I arXiv
%R 10.1143/JJAP.45.5344
%X We developed a one-way quantum key distribution (QKD) system based upon a planar lightwave circuit (PLC) interferometer. This interferometer is expected to be free from the backscattering inherent in commercially available two-way QKD systems and phase drift without active compensation. A key distribution experiment with spools of standard telecom fiber showed that the bit error rate was as low as 6% for a 100-km key distribution using an attenuated laser pulse with a mean photon number of 0.1 and was determined solely by the detector noise. This clearly demonstrates the advantages of our PLC-based one-way QKD system over two-way QKD systems for long distance key distribution.
%U http://arxiv.org/abs/quant-ph/0603041v2