Room-Temperature Readout Circuit for Improving Counting Rate of Superconducting Nanowire Single-Photon Detector

Junjie Wu; Yuqi Dong; Chengjun Zhang; Xuxiao Wan; Feng Shao; Yu Ding; Yanyang Jiang; Lü Chaolin

doi:10.3788/LOP223108

Laser & Optoelectronics Progress, Volume. 61, Issue 9, 0904002(2024)

Room-Temperature Readout Circuit for Improving Counting Rate of Superconducting Nanowire Single-Photon Detector

Junjie Wu^1,3, Yuqi Dong¹, Chengjun Zhang², Xuxiao Wan², Feng Shao², Yu Ding², Yanyang Jiang², and Lü Chaolin^2、*

¹School of Electronics and Information Engineering, Nanjing University of Information and Technology, Nanjing 210044, Jiangsu , China

²Photon Technology (Zhejiang) Co., Ltd., Jiaxing 314100, Zhejiang , China

³School of Electronics Information Engineering, Wuxi University, Wuxi 214105, Jiangsu , China

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Figures & Tables(6)

Fig. 1. SNSPD system with different cryogenic transmission lines.(a) Cryogenic coaxial cable; (b) cryogenic microstrip cable

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Fig. 2. Simulation model of SNSPD readout circuit. (a) Lumped circuit model; (b) distributed circuit model

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Fig. 3. Simulation of series resistor and transmission line on response waveform. (a) Influence of T_d on the output signal of SNSPD; (b) influence of series resistance on SNSPD output signal

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Fig. 4. Superconducting switching current distribution and response waveform with different resistors at 300 K. (a) Normalized distribution of superconducting switching current; (b) response waveform diagram

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Fig. 5. SNSPD performance comparison with series resistor. (a) Detection efficiency and dark count rate at 2 K and 300 K; (b) effect of series resistor on timing jitter; (c) counting rate with different input optical powers

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Table 1. Comparison of cryogenic coaxial cable and microstrip cable
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Table 1. Comparison of cryogenic coaxial cable and microstrip cable
Type Model Length /cm Attenuation@1 GHz /dB Thermal conductivity@3 K /（W·cm·K^-1）
Cryogenic coaxial cable CC-086-BeCu 100 3.7 1.0×10^-5
Cryogenic microstrip cable P-CA-CFlex-1 100 10 3.3×10^-6

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Junjie Wu, Yuqi Dong, Chengjun Zhang, Xuxiao Wan, Feng Shao, Yu Ding, Yanyang Jiang, Lü Chaolin. Room-Temperature Readout Circuit for Improving Counting Rate of Superconducting Nanowire Single-Photon Detector[J]. Laser & Optoelectronics Progress, 2024, 61(9): 0904002

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