Wu Junjie, You Lixing, Chen Sijing, Li Hao, He Yuhao, Lv Chaolin, Wang Zhen, Xie Xiaoming
Appl Opt. 2017 Mar 10;56(8):2195-2200. doi: 10.1364/AO.56.002195.
Low timing jitter is a unique merit of superconducting nanowire single-photon detectors (SNSPDs) for time-correlated applications. Quantitative analysis was performed for the SNSPD system. Aided by an oscilloscope with an optimal signal amplitude, we were able to measure a full width at half-maximum system timing jitter as low as 14.2 ps for a high-switching-current SNSPD using a room-temperature low-noise amplifier. When using a time-correlated single-photon counting module, the system timing jitter was 17.3 ps. The detector's intrinsic timing jitter was estimated at ∼12.0 ps.
低定时抖动是超导纳米线单光子探测器（SNSPD）在时间相关应用中的独特优点。对SNSPD系统进行了定量分析。在具有最佳信号幅度的示波器辅助下，我们能够使用室温低噪声放大器，测量高开关电流SNSPD的半高全宽系统定时抖动低至14.2 ps。当使用时间相关单光子计数模块时，系统定时抖动为17.3 ps。探测器的固有定时抖动估计约为12.0 ps。
