Robust second-order correlation of twin parametric beams generated by amplified spontaneous parametric down-conversion

Kunpeng Jia; Xiaohan Wang; Xinjie Lü; Ping Xu; Zhenlin Wang; Chee Wei Wong; Gang Zhao; Yan-Xiao Gong; Zhenda Xie; Shining Zhu

doi:doi:10.3788/COL202018.121902

Chinese Optics Letters, 2020, 18 (12): 121902, Published Online: Oct. 23, 2020

Robust second-order correlation of twin parametric beams generated by amplified spontaneous parametric down-conversion Download： 726次

Kunpeng Jia ¹Xiaohan Wang ¹Xinjie Lü ¹Ping Xu ^1,2Zhenlin Wang ¹Chee Wei Wong ³Gang Zhao ^1,*Yan-Xiao Gong ^1,**Zhenda Xie ^1,***Shining Zhu ¹

Author Affiliations

¹ National Laboratory of Solid State Microstructures, School of Physics, School of Electronic Science and Engineering, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

² Institute for Quantum Information and State Key Laboratory of High Performance Computing, College of Computing, National University of Defense Technology, Changsha 410073, China

³ Mesoscopic Optics and Quantum Electronics Laboratory, University of California Los Angeles, California, CA 90095, USA

Figures & Tables

Fig. 1. Comparison of the second-order correlation of thermal light and ASPDC. (a) Thermal light correlation. The thermal light $E_{T}$ is mixed with vacuum field $E_{V}$ at a beam splitter. Therefore, the light fields $E_{1}$ and $E_{2}$ are from the same source even though $G_{1, 2}^{(2)}$ is measured at different space–time points. $G_{1, 2}^{(2)}$ can be expressed as $G_{1, 2}^{(2)} = G_{Cor}^{(2)} + G_{1}^{(1)} G_{2}^{(1)}$ , where the correlated term $G_{Cor}^{(2)}$ comes from the same frequency components in the two split beams, and the background term $G_{1}^{(1)} G_{2}^{(1)}$ comes from different frequency components in the two split beams. (b) ASPDC correlation. The temporal correlation can be measured directly between the signal and idler beams, where the correlated term $G_{Cor}^{(2)}$ comes from signal frequency mode $ω_{s}$ and its inherently correlated counterpart in idler mode $ω_{i} = ω_{p} - ω_{s}$ , while the background term $G_{1}^{(1)} G_{2}^{(1)}$ comes from the random combination with ${ω^{'}}_{s}$ and ${ω^{'}}_{i} \neq ω_{p} - {ω^{'}}_{s}$ .

下载图片查看原文

Fig. 2. Simulated visibility as a function of gain parameter. The visibility drops from one to about 48.3%, as the parametric process transforms from SPDC to ASPDC. The two vertical bars mark the range of the gain level achieved in our experiment, where the visibility can be considered as constant.

下载图片查看原文

Fig. 3. Schematic of experiment setup. BS, beam splitter; DM, dichromatic mirror; IF, interference filter; FFPC, fiber Fabry–Perot cavity; FPC, fiber polarization controller; FBG, fiber Bragg grating; $A_{i}$ and $B_{i}$ , fiber connectors; VOA, variable optical attenuator; HPF, 600 MHz high-pass RF filter (removable).

下载图片查看原文

Fig. 4. ASPDC energy as a function of pump pulse energy.

下载图片查看原文

Fig. 5. (a) Correlation of twin beams as a function of relative time delay, where the red curve shows the background given by the pulse profile of the twin beams. (b) Normalized correlation with exponential decay fit. (c) Visibility as a function of pump pulse energy and transmission of variable optical attenuator (VOA), respectively. (d) Correlation measurement with 600 MHz high-pass RF filters in the photon current.

下载图片查看原文

Kunpeng Jia, Xiaohan Wang, Xinjie Lü, Ping Xu, Zhenlin Wang, Chee Wei Wong, Gang Zhao, Yan-Xiao Gong, Zhenda Xie, Shining Zhu. Robust second-order correlation of twin parametric beams generated by amplified spontaneous parametric down-conversion[J]. Chinese Optics Letters, 2020, 18(12): 121902.

Robust second-order correlation of twin parametric beams generated by amplified spontaneous parametric down-conversion Download： 726次

Fig. 2. Simulated visibility as a function of gain parameter. The visibility drops from one to about 48.3%, as the parametric process transforms from SPDC to ASPDC. The two vertical bars mark the range of the gain level achieved in our experiment, where the visibility can be considered as constant.

Fig. 4. ASPDC energy as a function of pump pulse energy.

关于本站 Cookie 的使用提示

全站搜索

Robust second-order correlation of twin parametric beams generated by amplified spontaneous parametric down-conversion Download： 726次

Fig. 2. Simulated visibility as a function of gain parameter. The visibility drops from one to about 48.3%, as the parametric process transforms from SPDC to ASPDC. The two vertical bars mark the range of the gain level achieved in our experiment, where the visibility can be considered as constant.

Fig. 4. ASPDC energy as a function of pump pulse energy.

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索