实时激光通信用自由运行InGaAs/InP单光子探测器(特邀)  

Compact Free-Running InGaAs/InP Single-Photon Detector forReal-Time Space Laser Communication (Invited)

作　　者：童启夏 雷勇 申向伟 谌晨 陈伟[1,2] 赵江林 任丽 崔大健 汪亮[3] 蔡善勇 Tong Qixia;Lei Yong;Shen Xiangwei;Chen Chen;Chen Wei;Zhao Jianglin;Ren Li;Cui Dajian;Wang Liang;Cai Shanyong(Chongqing Optoelectronics Research Institute,Chongqing 400060,China;Chongqing Key Laboratory of Quantum Information Chips and Devices,Chongqing 400060,China;State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]重庆光电技术研究所,重庆400060 [2]量子信息芯片与器件重庆重点实验室,重庆400060 [3]北京邮电大学信息光子学与光通信国家重点实验室,北京100876

出　　处：《激光与光电子学进展》2024年第7期142-149,共8页Laser & Optoelectronics Progress

摘　　要：为实现高速、高灵敏度、低成本的激光通信,优化改进一种新的InGaAs/InP单光子雪崩二极管(SPAD)以更好地使其应用于单个单光子探测器(SPD)探测的近红外激光通信系统。与上一代相比,优化各层结构的同时,在其中加入了介质-金属反射层并改进了双Zn扩散工艺。在1.25 GHz高频正弦门控(SWG)工作模式、225 K温度和6 V偏置下,所制备的InGaAs/InP SPAD实现了光子探测效率(PDE)为30%、暗计数率(DCR)为3 kHz和后脉冲概率(Pap)为2.4%的单光子性能。将基于高性能SPAD制备的自由运行负反馈雪崩二极管(NFAD)作为接收机,应用到已有实时激光通信系统中,实验得到了单个NFAD的激光通信性能参数。结果表明,在使用4进制脉冲相位调制(4PPM)方案中,在1 Mbit/s比特率条件下,单个InGaAs/InP NFAD具有1.1×10^(−5)误码率和−69.6 dBm灵敏度。In this study,to achieve high-speed,high-sensitivity,and low-cost laser communication,we optimized and improved a new InGaAs/InP single-photon avalanche diode(SPAD)to better apply to the near-infrared laser communication system detected using a single single-photon detector(SPD).Compared with the previous generation,we added a dielectric-metal reflective layer and improved the double Zn diffusion process while optimizing the structure of each layer.The fabricated InGaAs/InP SPAD achieved a photon detection efficiency(PDE)of 30%,a dark count rate(DCR)of 3 kHz,and an afterpulsing probability(Pap)of 2.4%under a high-frequency sine-wave gate(SWG)operating mode with a frequency of 1.25 GHz,temperature of 225 K,and bias of 6 V.A free-running negative feedback avalanche diode(NFAD)prepared based on the high-performance SPAD was used as a receiver in the real-time spatial laser communication system.The performance parameters of the laser communication system with the NFAD were experimentally obtained.The experimental results show that the InGaAs/InP NFAD with a bit rate of 1 Mbit/s using the 4-pulse position modulation(4PPM)scheme has a bit error rate of 1.1×10^(−5) and sensitivity of−69.6 dBm.

关 键 词：INGAAS/INP 单光子探测器 单光子雪崩二极管 负反馈雪崩二极管 光子探测效率 激光通信 

分 类 号：O472.4[理学—半导体物理]