Multi-channel SNSPD system with high detection efficiency at telecommunication wavelength
Shigehito Miki, Taro Yamashita, Mikio Fujiwara, Masahide Sasaki, and, Zhen Wang
TL;DR
This paper presents a four-channel SNSPD system operating at telecommunication wavelengths, achieving over 16% detection efficiency at 1550 nm, with the best channel reaching 21% at 1550 nm and 30% at 1310 nm, suitable for quantum communication.
Contribution
The paper introduces a multi-channel SNSPD system with high detection efficiency at telecom wavelengths, utilizing a Gifford-McMahon cryocooler for practical deployment.
Findings
All channels exceeded 16% efficiency at 1550 nm.
The best channel achieved 21% efficiency at 1550 nm.
The best channel achieved 30% efficiency at 1310 nm.
Abstract
We developed a four-channel superconducting nanowire single-photon detector system based on a Gifford-McMahon cryocooler. All channels showed a system detection efficiency (at a 100 Hz dark-count rate) higher than 16% at 1550 nm wavelength, and the best channel showed a system DE of 21% and 30% at 1550 nm and 1310 nm wavelength, respectively.
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