Polarization-independent, differential-phase-shift, quantum-key distribution system using upconversion detectors

被引：2

作者：

Iwai, Yuki ^{[1
,4
]}

Honjo, Toshimori ^{[2
,4
]}

Inoue, Kyo ^{[1
,2
,4
]}

Kamada, Hidehiko ^{[2
]}

Nishida, Yoshiki ^{[3
]}

Tadanaga, Osamu ^{[3
]}

Asobe, Masaki ^{[3
]}

机构：

[1] Osaka Univ, Suita, Osaka 5650871, Japan

[2] NTT Corp, NTT Basic Res Labs, Kanagawa 2430198, Japan

[3] NTT Corp, NTT Photon Labs, Kanagawa 2430198, Japan

[4] Japanese Sci & Technol Agcy Core Res Evolut Sci &, Chiyoda Ku, Tokyo 1020075, Japan

来源：

OPTICS LETTERS | 2009年 / 34卷 / 10期

关键词：

SINGLE-PHOTON DETECTION; LINBO3; WAVE-GUIDES; EFFICIENT;

D O I：

10.1364/OL.34.001606

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and demonstrate a polarization-independent, differential-phase-shift, quantum-key distribution system with upconversion detectors. Even though the detectors have polarization dependency, use of alternative polarization modulation and a two-bit delay interferometer achieves polarization-insensitive operation. In an experiment, sifted key bits were polarization-independently generated over 50 km fiber. (C) 2009 Optical Society of America

引用

页码：1606 / 1608

页数：3

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