投稿时间:2020-11-12  修订日期:2020-12-11  点此下载全文
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王天烨 上海理工大学 
费起来 上海理工大学 
徐博 上海理工大学 
梁焰 上海理工大学 
曾和平 华东师范大学  
中文摘要:InGaAs/InP雪崩光电二极管(InGaAs/InP APD)可实现近红外波段的单光子检测,具有集成度高功耗低等优势,被广泛应用于量子信息科学、激光测绘、深空通信等领域。通常,为了减小误计数,InGaAs/InP APD工作在门控盖革模式,其门控信号的重复频率直接决定了探测器的工作速率。基于此,我们采用低通滤波方案,结合集成了GHz正弦门控信号产生、雪崩信号采集、温度控制、偏置电压调节等功能的处理电路,搭建了GHz重复频率可调的高性能InGaAs/InP单光子探测器。GHz门控信号重复频率升高到2 GHz,其相位噪声仍优于-70 dBc/Hz@10 kHz,且尖峰噪声被抑制到热噪声水平,当探测效率为10%时,暗计数仅为2.4×10-6/门。此外,本文还验证了该方案下探测器的长时间稳定性,测试了工作速率、偏置电压等对APD关键性能参数的影响,为GHz InGaAs/InP APD的进一步集成及推广奠定基础。
中文关键词:单光子探测器  雪崩光电二极管
GHz InGaAs/InP single-photon detector with tunable repetition frequencies
Abstract:InGaAs/InP avalanche photodiodes (InGaAs/InP APDs) are capable of detecting single photons in the near infrared. With advantages of high integration and low power consumption, they are widely used in quantum information science, laser mapping, deep space communication and other fields. In order to reduce error counts, InGaAs/InP APDs are generally operated in gated Geiger mode, where the repetition frequency of the gated signal directly determines the detector's working rate. Thus, we adopt a low-pass filtering scheme to build a high-performance InGaAs/InP single-photon detector with adjustable GHz repeating frequency by integrating the processing circuit with GHz sine gating signal generation, avalanche signal acquisition, temperature control, bias voltage regulation and other functions. When the frequency of GHz gating signal increases to 2 GHz, its phase noise is still better than the -70 dBc/Hz@10 kHz, and the peak noise is suppressed to the level of thermal noise. When the detection efficiency is 10%, the dark count is only 2.4×10-6/ gate. In addition, we also verify the long-term stability of the detector under this scheme, and test the influence of working rate, bias voltage and other factors on the key performance parameters of APD, laying a foundation for the further integration and promotion of GHz InGaAs/InP APD.
keywords:single-photon detector, avalanche photodiode
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