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| 基于InGaAs/InP的高效率GHz单光子探测器 |
| High-efficiency GHz single-photon detector based on InGaAs/InP |
| 投稿时间：2024-02-19 |
| DOI：10.3969/j.issn.1005-5630.202402190022 |
| 中文关键词: 单光子探测器 雪崩光电二极管 低通滤波技术 |
| 英文关键词:single-photon detectors avalanche photodiode low-pass filtering technique |
| 基金项目:国家自然科学基金(61927813，62175152)；上海市市级科技重大专项（2019SHZDZX01） |
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| 中文摘要: |
| 作为量子信息系统的接收终端，提高单光子探测器的探测效率与工作速率意义重大。基于InGaAs/InP雪崩光电二极管（avalanche photodiode，APD）设计了2 GHz高探测效率单光子探测器，采用正弦门控与低通滤波技术相结合的方法，有效抑制了门控模式下APD的尖峰噪声并提取雪崩信号，尖峰噪声抑制比达到了41.5 dB。在通信波段1310 nm、工作速率2 GHz、工作温度–10 ℃的条件下，实现了探测效率40.2%、暗计数率7.75×10–6/门、后脉冲概率10.0%、时间抖动仅为80 ps的高性能单光子探测。此外，还分析了不同幅度的门控信号与多个APD工作温度，探究其对APD性能的影响，探索进一步提升探测器性能的可能，为实现远距离量子通信、量子计算等应用提供支撑。 |
| 英文摘要: |
| As the receiving terminal for quantum information systems, improving the photon detection efficiency and working frequency of single-photon detectors holds great significance. In this paper, we present a 2 GHz high-detection-efficiency single-photon detector utilizing an InGaAs/InP avalanche photodiode (APD). By combining sinusoidally gated operation with the low-pass filtering technique, the spike noise of the APD was effectively suppressed, achieving a noise rejection ratio of 41.5 dB. With high-frequency gated operation, the detection efficiency reached 40.2% at a wavelength of 1310 nm. The afterpulse probability was 10.0%, and the dark count rate was 7.75×10–6 per gate when the APD was cooled to -10 ℃. The SPD also demonstrated excellent time resolution, with a time jitter of only 80 ps. To further improve the performance of the SPD, we adjust the amplitudes of the gate signal and operating temperatures. The presented SPD provides support for applications such as quantum communication and quantum computing. |
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