摘要
We design and construct a resonant photodetector(RPD)with a Q factor of 320.83 at the resonant frequency of38.5 MHz on the basis of a theoretical analysis.Compared with the existing RPD under the same conditions,the signalto-noise-ratio of the error signal is increased by 15 dB and the minimum operation power is reduced from-55 dBm to-70 dBm.By comparing the standard deviations of the stability curves,we confirm that the RPD has a dramatic improvement on ultralow power extraction.In virtue of the RPD,we have completed the demonstration of channel multiplexing quantum communication.
作者
Jin-Rong Wang
Hong-Yu Zhang
Zi-Lin Zhao
Yao-Hui Zheng
王锦荣;张宏宇;赵子琳;郑耀辉(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China;Department of Electronics and Information Technology,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.62027821,11654002,11874250,and 11804207)
the National Key R&D Program of China(Grant No.2016YFA0301401)
the Key R&D Program of Shanxi,China(Grant No.201903D111001)
the Program for Sanjin Scholar of Shanxi Province
the Program for Outstanding Innovative Teams of Higher Learning Institutions of Shanxi,China
the Fund for Shanxi“1331 Project”Key Subjects Construction,China。
