title: Multichannel SNSPD system with high detection efficiency at telecommunication wavelength.
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 (DE) (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 and 1310 nm wavelength, respectively.
authors.affiliation: Kobe Advanced Research Center, National Institute of Information and Communications Technology, 588-2, Iwaoka, Iwaoka-cho, Nishi-ku, Kobe, Hyogo 651-2492, Japan. s-miki@nict.go.jp
authors.forename: Shigehito
authors.initials: S
authors.lastname: Miki
authors.forename: Taro
authors.initials: T
authors.lastname: Yamashita
authors.forename: Mikio
authors.initials: M
authors.lastname: Fujiwara
authors.forename: Masahide
authors.initials: M
authors.lastname: Sasaki
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang