【摘要】：以馬赫-曾德爾干涉儀作為基本模型對量子干涉雷達的探測原理進行分析,討論了目標探測過程中光場量子態(tài)的具體演化情況,并采用宇稱算符作為相位檢測算符分析了量子干涉雷達的回波信號,將其與基于振幅檢測的經(jīng)典雷達回波信號進行比較,證明量子干涉雷達具有超越衍射極限的超分辨率特性.此外,針對大氣損耗的進一步研究顯示:量子干涉雷達分辨率受大氣損耗影響較小,且可通過增大脈沖光子數(shù)N克服其影響;而量子干涉雷達的靈敏度則受到較大影響,尤其當(dāng)兩路光的損耗情況不同時,靈敏度隨N的增加呈現(xiàn)先升高后降低的趨勢;當(dāng)兩路光損耗情況相同時,系統(tǒng)靈敏度隨N的增加而升高且正比于1/N~(1/2).綜上,可根據(jù)探測光的大氣損耗情況適當(dāng)調(diào)節(jié)參考光的衰減來克服大氣損耗帶來的不良影響.
[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.
【作者單位】： 中國科學(xué)院安徽光學(xué)精密機械研究所中國科學(xué)院大氣成分與光學(xué)重點實驗室;中國科學(xué)技術(shù)大學(xué);光電對抗測試評估技術(shù)重點實驗室;
【基金】：國家自然科學(xué)基金(批準號:11574295) 光電對抗測試評估技術(shù)重點實驗室開放課題(批準號:GKCP2016001)資助的課題~~
【分類號】：TN958
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本文編號：2443011