Improving maximum count rate of superconducting nanowire single-photon detector with small active area using series attenuator

被引：11

作者：

Lv, Chaolin ^{[1
,2
]}

Zhang, Weijun ^{[1
,3
]}

You, Lixing ^{[1
,3
]}

Hu, Peng ^{[1
,2
]}

Wang, Heqing ^{[1
,2
]}

Li, Hao ^{[1
,3
]}

Zhang, Chengjun ^{[1
,2
]}

Huang, Jia ^{[1
,2
]}

Wang, Yong ^{[1
,2
]}

Yang, Xiaoyan ^{[1
,3
]}

Wang, Zhen ^{[1
,3
]}

Xie, Xiaoming ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, SIMIT, State Key Lab Funct Mat Informat, 865 Changning Rd, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

[3] CAS Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China

来源：

AIP ADVANCES | 2018年 / 8卷 / 10期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

TIME;

D O I：

10.1063/1.5049549

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Maximum count rate is a crucial parameter of superconducting nanowire single-photon detector (SNSPD) for quantum communication and laser communication. However, when increasing the incident photon flux, the SNSPD device with small active area is apt to latch due to the AC coupling of room temperature amplifier in the readout circuit, which limits SNSPD to reach a high count rate. We proposed a simple way by inserting an electrical attenuator in series with small-active area SNSPD to avoid the latching effect, thus improving maximum count rate effectively. The count rate with the system detection efficiency reduced by half increased by 6 times for SNSPD with an active area of Phi 15 mu m. (c) 2018 Author(s).

引用

页数：5

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