Counting rate enhancements in superconducting nanowire single-photon detectors with improved readout circuits
作者： Qingyuan Zhao , Tao Jia , Min Gu , Chao Wan , Labao Zhang
DOI: 10.1364/OL.39.001869
关键词:
摘要: Counting rates of superconducting nanowire single-photon detectors are usually estimated at hundreds MHz by their kinetic–inductive reset time. This maximum is also limited capacitor coupling effects in conventional readout circuits. In this Letter, we design and demonstrate an improved circuit that reduces the time removes limits. The counting rate 3 dB compression point increased four times for a large active area detector. We discuss nonlinear dependences on incident continuous-wave optical power give numerical model to explain our observations.
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