488 nm 泵浦的自发参量下转换特性研究

doi:10.3969/j.issn.1007-5461.2024.04.008

量子电子学报 ›› 2024, Vol. 41 ›› Issue (4): 638-648.doi: 10.3969/j.issn.1007-5461.2024.04.008

488 nm 泵浦的自发参量下转换特性研究

尹琳1,2, 李健军1, 郑小兵1*

( 1 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院通用光学定标与表征技术重点实验室, 安徽合肥 230031; 2 中国科学技术大学, 安徽合肥 230026 )

收稿日期:2022-08-09 修回日期:2022-11-09 出版日期:2024-07-28 发布日期:2024-07-28
通讯作者: Email: xbzheng@aiofm.ac.cn E-mail:Email: xbzheng@aiofm.ac.cn
作者简介:尹琳 ( 1990 - ), 女, 安徽合肥人, 博士生, 主要从事高精度光学遥感器辐射定标技术方面的研究。 Email: ylxw52@ mail.ustc.edu.cn
基金资助:
国家重点研发计划 (2022YFB3903102)

Research on spontaneous parametric down⁃conversion characteristics by 488 nm pumped

YIN Lin1,2 , LI Jianjun1 , ZHENG Xiaobing1*

( 1 Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China )

Received:2022-08-09 Revised:2022-11-09 Published:2024-07-28 Online:2024-07-28

摘要/Abstract

摘要： 自发参量下转换的光谱、光子数率和时间相关性对宽波段光电探测器定标具有重要意义。本文理论模拟了 488 nm连续激光泵浦偏硼酸钡 (BBO) 晶体的光谱和光子数率的分布, 搭建了光谱、光子数率和时间相关性测量的实验系统。基于理论研究, BBO晶体的相位匹配角选择24.3184°, 可实现605~2523 nm连续宽波段相关光子制备, 光子数率最大值为4.2716 × 107 s -1 。采用CMOS相机和光电倍增管测量相关光子圆环和光子数率, 根据波长和探测器响应波段来选择相应的光电探测器, 以测量时间相关性。实验测量得到605~1000 nm波段的相关光子光谱, 光子数率的实测值与理论值偏差在1个量级内, 并观察到710~1560 nm波段的符合峰。实验结果验证了所建立的理论模型的正确性、自发参量下转换过程的宽光谱特性和时间相关性, 为实现可见-近红外波段的宽光谱相关光子定标提供了研究基础。

关键词: 非线性光学, 可见-近红外相关光子, 自发参量下转换, 光子数率, 时间相关性

Abstract: The spectrum, photon count rate and time correlation of spontaneous parametric downconversion are of great significance for the broadband photodetector calibration. In the work, the spectrum and photon count rate distribution of 488 nm continuous laser pumped barium metaborate (BBO) crystal are simulated theoretically, and an experimental measurement system of spectrum, photon count rate, and time correlation are set up. Based on the theoretical results, BBO crystal phase-matching angle is selected as 24.3184°, which can achieve 605-2523 nm continuous broadband correlated photon spectral preparation, and the maximum of photon count rate can reach to 4.2716 × 107 s-1 . CMOS camera and photomultiplier tube are used to measure the correlated photon ring and photon count rate, and the corresponding photodetector is selected according to the wavelength and detector response band to measure the time correlation. As a result, the correlated photon spectrum of 605-1000 nm is measured, and it is found that the measured photon count rate deviates from the theoretical value by an order of magnitude. Besides, the coincidence peaks are also observed in the range of 710 nm to 1560 nm. The experimental results verify the correctness of the theoretical model and the wide spectral characteristics and time correlation of spontaneous parametric down-conversion process, which provides a research foundation for the realization of the wide spectral correlation photon calibration in the visible-nearinfrared band.

Key words: nonlinear optics, visible-near-infrared correlated photon, spontaneous parametric downconversion, photon count rate, time correlation

中图分类号:

O437

尹琳, 李健军, 郑小兵. 488 nm 泵浦的自发参量下转换特性研究[J]. 量子电子学报, 2024, 41(4): 638-648.

YIN Lin, , LI Jianjun , ZHENG Xiaobing. Research on spontaneous parametric down⁃conversion characteristics by 488 nm pumped[J]. Chinese Journal of Quantum Electronics, 2024, 41(4): 638-648.

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488 nm 泵浦的自发参量下转换特性研究

Research on spontaneous parametric down⁃conversion characteristics by 488 nm pumped

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