摘要
为了研究量子关联测量和Hong-Ou-Mandel干涉测量在激光雷达探测上的潜在应用,采用基于色散位移光纤制备关联双光子源的方法和全同光子的Hong-Ou-Mandel干涉原理,搭建了关联双光子产生平台和Hong-Ou-Mandel干涉平台,进行了理论分析和实验检测。结果表明,制备出的关联双光子源,其双光子产生率最高约8kHz,符合/偶然符合计数比最大值约为15,验证了双光子源的量子关联特性;测试了两路弱相干-单光子源的Hong-Ou-Mandel干涉,干涉可见度为0.41±0.01,若将一路光子信号作为激光雷达的回波信号,Hong-Ou-Mandel干涉测量可以将激光雷达的时间测量精度提升到0.95ps±0.03ps,对应空间分辨率为284.06μm±9.94μm。相关实验结果为后续研究不同体制的量子光学-激光雷达技术奠定了基础。
In order to study the potential applications of quantum correlation measurement and Hong-Ou-Mandel(HOM)interference to laser detection and ranging(LADAR)systems,the method for preparing the correlated two-photon source based on dispersion-shifted fiber(DSF)and the HOM interference principle of identical photons was adopted.A correlated two-photon generation platform and a HOM interferometer for weak coherent light interference experiment were assembled for theoretical analysis and experimental verification.The results show that,the correlated two-photon source has the maximum two-photon generation rate and the ratio of coincidence to accidental coincidence count of about 8kHz and 15,respectively.The visibility of HOM interference fringe is 0.41±0.01,HOM interference can improve the time measuring precision of LADAR to 0.95ps±0.03ps,corresponding to a spatial resolution of 284.06μm±9.94μm.The results lay a foundation for further research to improve LADAR performance by using quantum optics technologies.
作者
徐强
沈思
谢修敏
吴鹏
周强
邓光伟
王浟
宋海智
XU Qiang;SHEN Si;XIE Xiumin;WU Peng;ZHOU Qiang;DENG Guangwei;WANG You;SONG Haizhi(Southwest Institute of Technical Physics, Chengdu 610041, China;Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China)
出处
《激光技术》
CAS
CSCD
北大核心
2021年第1期44-47,共4页
Laser Technology
基金
四川省科技计划资助项目(2020YFG0289)。
