Low noise InGaAs/InP single-photon detector with DC to 1 GHz tunable gate frequency  

作　　者：JIA-LIN CHEN DE-YONG HE SHUANG WANG YING-LIANG SHI JIA-QI GENG ZHEN-QIANG YIN WEI CHEN GUAN-JIE FAN-YUAN GUANG-CAN GUO ZHENG-FU HAN 

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China [4]Anhui Asky Quantum Technology Co.,Ltd.,Wuhu 241102,China

出　　处：《Photonics Research》2024年第12期3027-3032,共6页光子学研究(英文版)

基　　金：National Natural Science Foundation of China(62271463,62425507,62301524,62105318,62171424);Fundamental Research Funds for the Central Universities;China Postdoctoral Science Foundation(2022M723064);Natural Science Foundation of Anhui Province(23080850F216);Innovation Program for Quantum Science and Technology(2021ZD0300700).

摘　　要：An InGaAs/InP single-photon detector(SPD)typically operates in gated mode,but the capacitive response of a single-photon avalanche diode introduces spike noise,obscuring the avalanche signal.Most avalanche signal discrimination schemes cannot completely eliminate spike noise,resulting in residual noise.Limited by residual noise,these schemes have large noise and a limited frequency tuning range.However,for applications like quantum key distribution and laser ranging,a low noise,frequency-tunable InGaAs/InP SPD is crucial for enhancing system performance.Here,we propose a(residual noise assisted)discrimination method that aligns the maximum amplitude of the avalanche signal with the peak of the residual noise.This method turns the residual noise from adversity into an advantage for signal discrimination.With this method,we achieve tunable gating frequency from DC to 1 GHz.Additionally,this method enables the discrimination of weak avalanche signals,allowing effective single-photon detection at low avalanche gain.Across the entire tuning range,at a 20%detection efficiency,the dark count rate is approximately 5.0×10^(−7)per gate,and the afterpulse probability is less than 1.0%,significantly lower than in previous experiments.The proposed SPD exhibits low noise and a wide tunable gating frequency range,providing a reliable foundation for various applications.

关 键 词：INGAAS/INP TUNABLE tuning 

分 类 号：TN312.7[电子电信—物理电子学]