"Circular type" quantum key distribution

Author

Nishioka, Tsuyoshi ; Ishizuka, Hirokazu ; Hasegawa, Toshio ; Abe, Jun´ichi

Author_Institution

Inf. Technol. Res. & Dev. Center, Mitsubishi Electr. Corp., Kanagawa, Japan

Volume

14

Issue

4

fYear

2002

fDate

4/1/2002 12:00:00 AM

Firstpage

576

Lastpage

578

Abstract

A "circular type" interferometric system for quantum key distribution is proposed. The system, which adopts a Sagnac loop, is highly stable and simple. The stability derives from its self-alignment and compensation for birefringence and the system\´s simplicity allows it to achieve an extremely fast bit rate. Moreover, it is easily applicable to multiparty setup. Key creation with 0.1 photon per pulse at a rate of 1.2 kHz with a 5.4% quantum bit-error rate over a 200-m fiber was realized.

Keywords

birefringence; light interferometry; optical delay lines; optical fibre communication; public key cryptography; quantum cryptography; stability; 200 m; Sagnac loop; birefringence; circular type interferometric system; circular type quantum key distribution; compensation; extremely fast bit rate; highly stable; multiparty setup; photon per pulse; quantum bit-error rate; quantum cryptography; quantum key distribution; self-alignment; Birefringence; Bit rate; Cryptography; Fluctuations; Optical fiber couplers; Optical fiber polarization; Optical interferometry; Optical pulses; Proposals; Quantum computing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.992616

Filename

992616