journal article·2018-10-01Open access

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

Chaolin Lv, Weijun Zhang, Lixing You, Peng Hu, Heqing Wang, Hao Li, Chengjun Zhang, Jia Huang, Yong Wang, Xiaoyan Yang, Zhen Wang, Xiaoming Xie

AIP Advances· Volume 8· Issue 10

Abstract

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 Φ15 μm.
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Research context

OpenAlex topics: Advanced Optical Sensing Technologies · Quantum Information and Cryptography · Advanced Fiber Laser Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences 1 , 865 Changning Rd., Shanghai 200050, China

University of Chinese Academy of Sciences 2 , 19A Yuquan Rd., Beijing 100049, China

CAS Center for Excellence in Superconducting Electronics (CENSE) 3 , Shanghai 200050, China

Funding

National Natural Science Foundation of China · Science and Technology Commission of Shanghai Municipality · Joint Fund of Astronomy · Key Programme

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