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

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 ach...

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Bibliographic Details
Published in:arXiv.org 2020-12
Main Authors: Wei-Jun, Zhang, Guang-Zhao, Xu, Li-Xing, You, Cheng-Jun, Zhang, Huang, Hao, Ou, Xin, Xing-Qu, Sun, Jia-Min, Xiong, Li, Hao, Wang, Zhen, Xiao-Ming, Xie
Format: Article
Language:English
Subjects:
Arrays
Crosstalk
Nanowires
Optical fibers
Photons
Pixels
Sensors
Superconductivity
Telecommunications
Timing jitter
Vibration
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2101.01556