Counting rate enhancements in superconducting nanowire single-photon detectors with improved readout circuits
Counting rate enhancements in superconducting nanowire single-photon detectors with improved readout circuits
复制标题
通过改进的读出电路提高超导纳米线单光子探测器的计数率
DOI：
10.1364/ol.39.001869
复制
发表时间：
2014-04-01
期刊：
影响因子：
3.6
通讯作者：
Wu, Peiheng
中科院分区：
文献类型：
--
作者：
Zhao, Qingyuan;Jia, Tao;Wu, Peiheng
超导纳米线单光子探测器的计数率通常由其动力学感应复位时间估计为数百MHz。该最大值还受到常规读出电路中的电容器耦合效应的限制。在这封信中，我们设计和演示了一种改进的读出电路，减少复位时间，消除电路限制。对于大有效面积探测器，在3dB压缩点处的计数率增加了四倍。我们还讨论了计数率对入射连续波光功率的非线性依赖关系，并给出了一个数值模型来解释我们的观察。(C)2014年美国光学学会
Counting rates of superconducting nanowire single-photon detectors are usually estimated at hundreds of MHz by their kinetic-inductive reset time. This maximum is also limited by capacitor coupling effects in conventional readout circuits. In this Letter, we design and demonstrate an improved readout circuit that reduces the reset time and removes circuit limits. The counting rate at the 3 dB compression point is increased by four times for a large active area detector. We also discuss nonlinear dependences of the counting rate on the incident continuous-wave optical power and give a numerical model to explain our observations. (C) 2014 Optical Society of America