一个多功能光子计数系统,具有活跃的后脉冲抑制,用于自由运行的负反雪崩二极管
Nigar Sultana1,2,3, Jean-Philippe Bourgoin1,3, Katanya B Kuntz1,3
1Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
The Review of scientific instruments
|April 19, 2024
概括
这项研究为InGaAs/InP负反雪崩二极管 (NFADs) 引入了新的电子,以改善光子检测. 该系统显著减少后脉冲和暗计数,使NFAD成为量子通信的成本效益较高的选择.
科学领域:
- 量子光学是一种量子光学.
- 光子学 是一个光子学.
- 半导体设备 半导体设备
背景情况:
- 基于甲/ (InGaAs/InP) 的负反雪崩二极管 (NFAD) 适用于电信波长的光子检测.
- 对于NFAD的最佳性能,需要低温来最大限度地降低后脉冲和暗计数率 (DCRs).
研究的目的:
- 介绍一个新的读出电子系统,具有NFADs的活跃后脉冲抑制和灵活冷却.
- 评估该系统在提高基于NFAD的光子探测器性能方面的有效性.
主要方法:
- 两个NFAD探测器的特征.
- 在各种操作条件下对新的读出电子设备的评估.
- 在最佳NFAD偏差下测量后脉冲概率和DCRs.
主要成果:
- 读取系统显著降低了200次的次脉冲概率,死亡时间为520微秒.
- 总的DCR保持在每秒100个计数或更少的100个左右,保留时间为20微秒.
- 证明了基于NFAD的光子探测器的性能提高.
结论:
- 多功能读取系统有效地抑制了后脉冲,并减少了NFAD中的DCR.
- 配备这种系统的NFAD为复杂的探测器 (如超导纳米线单光子探测器) 提供了具有成本效益的替代方案.
- 这项技术有利于远距离量子通信和电信波长的低噪音单光子检测.
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