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

• URL: http://arxiv.org/abs/2101.01556v1
• Date: Tue, 29 Dec 2020 02:43:37 GMT
• Title: A 16-channel fiber array-coupled superconducting single-photon detector array with average system detection efficiency over 60% at telecom wavelength
• Authors: 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, and Xiao-Ming Xie
• Abstract summary: We report a compact, scalable, and high-performance superconducting nanowire single-photon detector (SNSPD) array. 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.
• Score: 9.77574317160143
• License: http://creativecommons.org/licenses/by/4.0/
• 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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