Sub-shot-noise-limit discrimination of on-off keyed coherent signals via a quantum receiver with a superconducting transition edge sensor

被引：42

作者：

Tsujino, Kenji ^{[1
,2
]}

Fukuda, Daiji ^{[3
]}

Fujii, Go ^{[3
,4
]}

Inoue, Shuichiro ^{[4
]}

Fujiwara, Mikio ^{[1
]}

Takeoka, Masahiro ^{[1
]}

Sasaki, Masahide ^{[1
]}

机构：

[1] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

[2] Japan Sci & Technol Agcy, NEC Tsukuba Labs, Tsukuba, Ibaraki 3058501, Japan

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

[4] Nihon Univ, Inst Quantum Sci, Chiyoda Ku, Tokyo 1018308, Japan

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 08期

关键词：

D O I：

10.1364/OE.18.008107

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a sub-shot-noise-limit discrimination of on-off keyed coherent signals by an optimal displacement quantum receiver in which a superconducting transition edge sensor is installed. Use of a transition edge sensor and a fiber beam splitter realizes high total detection efficiency and high interference visibility of the receiver and the observed average error surpasses the shot-noise-limit in a wider range of the signal power. Our technique opens up a new technology for the sub-shot-noise-limit detection of coherent signals in optical communication channels. (c) 2010 Optical Society of America

引用

页码：8107 / 8114

页数：8