大气损耗对量子干涉雷达的影响机理
发布时间：2019-03-18 16:12
【摘要】：以马赫-曾德尔干涉仪作为基本模型对量子干涉雷达的探测原理进行分析,讨论了目标探测过程中光场量子态的具体演化情况,并采用宇称算符作为相位检测算符分析了量子干涉雷达的回波信号,将其与基于振幅检测的经典雷达回波信号进行比较,证明量子干涉雷达具有超越衍射极限的超分辨率特性.此外,针对大气损耗的进一步研究显示:量子干涉雷达分辨率受大气损耗影响较小,且可通过增大脉冲光子数N克服其影响;而量子干涉雷达的灵敏度则受到较大影响,尤其当两路光的损耗情况不同时,灵敏度随N的增加呈现先升高后降低的趋势;当两路光损耗情况相同时,系统灵敏度随N的增加而升高且正比于1/N~(1/2).综上,可根据探测光的大气损耗情况适当调节参考光的衰减来克服大气损耗带来的不良影响.
[Abstract]:The detection principle of the quantum interference radar is analyzed by the Mach-Zehnder interferometer as the basic model, the specific evolution of the light field quantum state in the target detection process is discussed, and the echo signal of the quantum interference radar is analyzed by using the parity operator as the phase detection operator. It is compared with the classical radar echo signal based on the amplitude detection, and it is proved that the quantum interference radar has the super-resolution characteristic which is beyond the diffraction limit. In addition, the further study on the atmospheric loss shows that the resolution of the quantum interference radar is less influenced by the atmospheric loss and can overcome the influence by increasing the number of the pulse photons N; and the sensitivity of the quantum interference radar is greatly affected, especially when the loss of the two paths of light is different, The sensitivity decreases with the increase of N. When the two optical losses are the same, the sensitivity of the system increases with the increase of N and is proportional to 1/ N ~ (1/2). In general, the attenuation of the reference light can be properly adjusted according to the atmospheric loss of the detected light to overcome the adverse effect caused by the atmospheric loss.
【作者单位】： 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室;中国科学技术大学;光电对抗测试评估技术重点实验室;
【基金】：国家自然科学基金(批准号:11574295) 光电对抗测试评估技术重点实验室开放课题(批准号:GKCP2016001)资助的课题~~
【分类号】：TN958
，
本文编号：2443011
[Abstract]:The detection principle of the quantum interference radar is analyzed by the Mach-Zehnder interferometer as the basic model, the specific evolution of the light field quantum state in the target detection process is discussed, and the echo signal of the quantum interference radar is analyzed by using the parity operator as the phase detection operator. It is compared with the classical radar echo signal based on the amplitude detection, and it is proved that the quantum interference radar has the super-resolution characteristic which is beyond the diffraction limit. In addition, the further study on the atmospheric loss shows that the resolution of the quantum interference radar is less influenced by the atmospheric loss and can overcome the influence by increasing the number of the pulse photons N; and the sensitivity of the quantum interference radar is greatly affected, especially when the loss of the two paths of light is different, The sensitivity decreases with the increase of N. When the two optical losses are the same, the sensitivity of the system increases with the increase of N and is proportional to 1/ N ~ (1/2). In general, the attenuation of the reference light can be properly adjusted according to the atmospheric loss of the detected light to overcome the adverse effect caused by the atmospheric loss.
【作者单位】： 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室;中国科学技术大学;光电对抗测试评估技术重点实验室;
【基金】：国家自然科学基金(批准号:11574295) 光电对抗测试评估技术重点实验室开放课题(批准号:GKCP2016001)资助的课题~~
【分类号】：TN958
，
本文编号：2443011
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