| 可用于激光雷达的量子光学技术 |
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| 引用本文： | 徐强,沈思,谢修敏,吴鹏,周强,邓光伟,王浟,宋海智.可用于激光雷达的量子光学技术[J].激光技术,2021,45(1):44-47. |
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| 作者姓名： | 徐强 沈思 谢修敏 吴鹏 周强 邓光伟 王浟 宋海智 |
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| 作者单位： | 1.西南技术物理研究所，成都 610041 |
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| 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。
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| 关 键 词： | 量子光学 激光雷达 关联双光子源 Hong-Ou-Mandel干涉 |
| 收稿时间： | 2019-11-29 |
Quantum optics techniques for laser detecting and ranging |
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| Abstract: | 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. |
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