High-Efficiency Broadband Near-Infrared Single-Photon Frequency Upconversion and Detection  

作　　者：Jian-Hui Ma Hui-Qin Hu Yu Chen Guang-Jian Xu Hai-Feng Pan E Wu 马建辉;胡慧琴;陈昱;许广建;潘海峰;武愕(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006)

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062 [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006

出　　处：《Chinese Physics Letters》2020年第3期17-21,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.11722431,11674099 and 11621404;the Program of Introducing Talents of Discipline to Universities under Grant No.B12024。

摘　　要：We propose and demonstrate a high efficiency broadband near infrared single-photon upconversion and detection with a broadband pump laser based on sum frequency conversion in the PPLN crystal.By using a pump laser centered at 1040 nm with a spectral bandwidth of 10 nm,the signal single-photons centered at 1562 nm with a broadband bandwidth up to 7.2 nm are frequency-converted from the near infrared to the visible regime.A maximum conversion efficiency of 18.8%is achieved,while the background noise is measured to be only1.2×10^-3 counts/pulse.The corresponding spectral linewidth of the upconverted photons is 0.2 nm.This scheme of broadband infrared single-photon upconversion and detection provides potential solutions in infrared laser ranging,broadband infrared imaging and quantum key distribution.

关 键 词：PUMP EFFICIENCY INFRARED 

分 类 号：O413[理学—理论物理] TN248[理学—物理]