After-pulse-discarding in single-photon detection to reduce bit errors in quantum key distribution

被引：23

作者：

Yoshizawa, A ^{[1
]}

Kaji, R ^{[1
]}

Tsuchida, H ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

来源：

OPTICS EXPRESS | 2003年 / 11卷 / 11期

关键词：

Avalanche diodes - Backscattering - Birefringence - Electric potential - Error analysis - Faraday effect - Light polarization - Optical beam splitters - Optical communication - Optical fibers - Optical rotation - Photons - Quantum efficiency - Semiconductor lasers - Signal processing;

D O I：

10.1364/OE.11.001303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate fiber-optic quantum key distribution (QKD) at 1550 nm using single-photon detectors operating at 5 MHz. Such highspeed single-photon detectors are essential to the realization of efficient QKD. However, after-pulses increase bit errors. In the demonstration, we discard after-pulses by measuring time intervals of detection events. For a fiber length of 10.5 km, we have achieved a key rate of 17 kHz with an error of 2%. (C) 2003 Optical Society of America.

引用

页码：1303 / 1309

页数：7