Compactly packaged superconducting nanowire single-photon detector with an optical cavity for multichannel system

被引：54

作者：

Miki, Shigehito ^{[1
]}

Takeda, Masanori ^{[2
]}

Fujiwara, Mikio ^{[3
]}

Sasaki, Masahide ^{[3
]}

Wang, Zhen ^{[1
]}

机构：

[1] Natl Inst Informat & Commun Technol, Kansai Adv Res Ctr, Nishi Ku, Kobe, Hyogo 6512492, Japan

[2] Natl Astron Observ Japan, Tokyo 1818588, Japan

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

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 26期

关键词：

QUANTUM KEY DISTRIBUTION;

D O I：

10.1364/OE.17.023557

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We developed superconducting nanowire single-photon detectors with an optical cavity (OC-SNSPDs) for multichannel systems. For efficient coupling, the devices were installed in compact fiber-coupled packages after their substrate thickness was reduced from 400 to 45 mu m. The measured detection efficiency (DE) measurement at different substrate thicknesses and the estimation of optical coupling efficiency indicated that similar to 98% of the input light beam could be radiated on a 15 x 15 mu m(2) nanowire area from behind the substrate. The DEs of a NbN OC-SNSPD system were observed to be 9.5% and 25% at 1550 nm and 1310 nm, respectively (dark-count rate: 100 c/s). (C) 2009 Optical Society of America

引用

页码：23557 / 23564

页数：8

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