One-way quantum key distribution system based on planar lightwave circuits
Y Nambu, K Yoshino, A Tomita - Japanese journal of applied …, 2006 - iopscience.iop.org
Y Nambu, K Yoshino, A Tomita
Japanese journal of applied physics, 2006•iopscience.iop.orgWe 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 …
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 …
Abstract
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.
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