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Chinese Physics Letters

Performance of Superconducting Nanowire Single-Photon Detection System

申小芳, 杨晓燕, 尤立星

Published Jan 1, 2010• 0 citations
OpenAlex

Abstract

我们在场我们的实验室基于 cryocooler 的超导的 nanowire 单身者光子察觉(SNSPD ) 系统。黑暗计数率和系统量效率与一个 300-mK 温度变化在 3.1 K 的洗澡温度被调查。SNSPD 的极化敏感也被测量，并且数率的系统和预定神经质被讨论。[从作者抽象]

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A superconducting nanowire single photon detector (SNSPD) system for telecommunication wavelength using a GM cryocooler was developed and its performance was verified. The cryocooler based SNSPD system can operate continuously with a 100 V AC power supply without any cryogen. The packaged SNSPD device was cooled to 2.96 K within a thermal fluctuation range of 10 mK. An SNSPD with an area of 20 times 20 mum2showed good system detection efficiency (DE) at 100 Hz dark count rate of 2.6% and 4.5% at wavelengths of 1550 and 1310 nm, respectively. An SNSPD with an area of 10 times 10 mum2and kinetic inductance lower than that of the large area device showed good system DE of 2.6% at a wavelength of 1550 nm. The SNSPD system could be operated for over 10 h with constant system DE and dark count rate.