1.Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
2.Purple Mountain Laboratories, Nanjing, Jiangsu 211111, China
3.Hefei National Laboratory, Hefei, Anhui 230088, China
4.National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210023, China
Qing-Yuan Zhao (qyzhao@nju.edu.cn)
收稿日期:2023-08-10,
修回日期:2023-12-21,
录用日期:2023-12-26,
网络出版日期:2024-01-22,
纸质出版日期:2024-02-29
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A compact multi-pixel superconducting nanowire single-photon detector array supporting gigabit space-to-ground communications[J]. LSA, 2024,13(2):254-266.
Hao, H. et al. A compact multi-pixel superconducting nanowire single-photon detector array supporting gigabit space-to-ground communications. Light: Science & Applications, 13, 254-266 (2024).
A compact multi-pixel superconducting nanowire single-photon detector array supporting gigabit space-to-ground communications[J]. LSA, 2024,13(2):254-266. DOI: 10.1038/s41377-023-01374-1.
Hao, H. et al. A compact multi-pixel superconducting nanowire single-photon detector array supporting gigabit space-to-ground communications. Light: Science & Applications, 13, 254-266 (2024). DOI: 10.1038/s41377-023-01374-1.
Classical and quantum space-to-ground communications necessitate highly sensitive receivers capable of extracting information from modulated photons to extend the communication distance from near-earth orbits to deep space explorations. To achieve gigabit data rates while mitigating strong background noise photons and beam drift in a highly attenuated free-space channel
a comprehensive design of a multi-functional detector is indispensable. In this study
we present an innovative compact multi-pixel superconducting nanowire single-photon detector array that integrates near-unity detection efficiency (91.6%)
high photon counting rate (1.61 Gcps)
large dynamic range for resolving different photon numbers (1–24)
and four-quadrant position sensing function all within one device. Furthermore
we have constructed a communication testbed to validate the advantages offered by such an architecture. Through 8-PPM (pulse position modulation) format communication experiments
we have achieved an impressive maximum data rate of 1.5 Gbps
demonstrating sensitivities surpassing previous benchmarks at respective speeds. By incorporating photon number information into error correction codes
the receiver can tolerate maximum background noise levels equivalent to 0.8 photons/slot at a data rate of 120 Mbps—showcasing a great potential for daylight operation scenarios. Additionally
preliminary beam tracking tests were conducted through open-loop scanning techniques
which revealed clear quantitative dependence indicating sensitivity variations based on beam location. Based on the device characterizations and communication results
we anticipate that this device architecture
along with its corresponding signal processing and coding techniques
will be applicable in future space-to-ground communication tasks.
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