10.5 km fiber-optic quantum key distribution at 1550 nm with a key rate of 45 kHz

被引：23

作者：

Yoshizawa, A ^{[1
]}

Kaji, R ^{[1
]}

Tsuchida, H ^{[1
]}

机构：

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

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2004年 / 43卷 / 6A期

关键词：

quantum key distribution; single-photon detector; after-pulse; bit error; 1550; nm; fiber;

D O I：

10.1143/JJAP.43.L735

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-speed single-photon detectors are crucial for efficiently performing quantum key distribution. We demonstrate fiberoptic quantum key distribution at 1550 nm using single-photon detectors operating at 10 MHz. Discharge pulse counting is adopted for single-photon detection in order to suppress after-pulse generation. Furthermore, by setting a dead time in single-photon detection, we discard after-pulses to reduce the number of bit errors in the quantum key distribution. Using discharge pulse counting and after-pulse discarding in the quantum key distribution, we can achieve a key rate of 45 kHz with a bit-error rate of 2%. The fiber length is 10.5 km.

引用

页码：L735 / L737

页数：3

共 9 条

[1] QUANTUM CRYPTOGRAPHY USING ANY 2 NONORTHOGONAL STATES [J].

BENNETT, CH .

PHYSICAL REVIEW LETTERS, 1992, 68 (21) :3121-3124

[2] An autocompensating fiber-optic quantum cryptography system based on polarization splitting of light [J].

Bethune, DS ;

Risk, WP .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 2000, 36 (03) :340-347

[3]

GOBBY C, 2003, CLEO EUR MUN GERM

[4] Single-photon interference experiment over 100km for quantum cryptography system using balanced gated-mode photon detector [J].

Kosaka, H ;

Tomita, A ;

Nambu, Y ;

Kimura, T ;

Nakamura, K .

ELECTRONICS LETTERS, 2003, 39 (16) :1199-1201

[5] Quantum key distribution over 67 km with a plug&play system [J].

Stucki, D ;

Gisin, N ;

Guinnard, O ;

Ribordy, G ;

Zbinden, H .

NEW JOURNAL OF PHYSICS, 2002, 4 :41.1-41.8

[6] Photon counting for quantum key distribution with Peltier cooled InGaAs/InP APDs [J].

Stucki, Damien ;

Ribordy, Grégoire ;

Stefanov, André ;

Zbinden, Hugo ;

Rarity, John G. ;

Wall, Tom .

1967, Taylor and Francis Ltd. (48)

[7] Gated-mode single-photon detection at 1550 nm by discharge pulse counting [J].

Yoshizawa, A ;

Kaji, R ;

Tsuchida, H .

APPLIED PHYSICS LETTERS, 2004, 84 (18) :3606-3608

[8] After-pulse-discarding in single-photon detection to reduce bit errors in quantum key distribution [J].

Yoshizawa, A ;

Kaji, R ;

Tsuchida, H .

OPTICS EXPRESS, 2003, 11 (11) :1303-1309

[9] A method of discarding after-pulses in single-photon detection for quantum key distribution [J].

Yoshizawa, A ;

Kaji, R ;

Tsuchida, H .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2002, 41 (10) :6016-6017

← 1 →