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arXiv · 2101.01556

A 16-channel fiber array-coupled superconducting single-photon detector array with average system detection efficiency over 60% at telecom wavelength

Wei-Jun Zhang·Guang-Zhao Xu·Li-Xing You·Cheng-Jun Zhang·Hao Huang·Xin Ou·Xing-Qu Sun·Jia-Min Xiong·Hao Li·Zhen Wang·Xiao-Ming Xie
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Abstract

We report a compact, scalable, and high-performance superconducting nanowire single-photon detector (SNSPD) array by using a multichannel optical fiber array-coupled configuration. For single pixels with an active area of 18 um in diameter and illuminated at the telecom wavelength of 1550 nm, we achieved a pixel yield of 13/16 on one chip, an average system detection efficiency of 69% at a dark count rate of 160 cps, a minimum timing jitter of 74 ps, and a maximum count rate of ~40 Mcps. The optical crosstalk coefficient between adjacent channels is better than -60 dB. The performance of the fiber array-coupled detectors is comparable with a standalone detector coupled to a single fiber. Our method is promising for the development of scalable, high-performance, and high-yield SNSPDs.

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Wei-Jun Zhang, Guang-Zhao Xu, Li-Xing You, Cheng-Jun Zhang, Hao Huang, Xin Ou, Xing-Qu Sun, Jia-Min Xiong, Hao Li, Zhen Wang, Xiao-Ming Xie. 2020-12-29. A 16-channel fiber array-coupled superconducting single-photon detector array with average system detection efficiency over 60% at telecom wavelength. https://doi.org/10.1364/ol.418219

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