本文選題：單光子捕獲概率　切入點：拉蓋爾-高斯光束　出處：《光子學報》2017年01期 　論文類型：期刊論文

【摘要】：單光子源通常采用基于高斯光束的高度衰減激光脈沖,假設激光束具有初始高斯時域脈沖波形和TEM_(01)模拉蓋爾-高斯空域分布.基于折射率起伏的Rytov近似和修正von Karman譜模型,研究了大氣湍流對星地量子通信單光子捕獲概率的影響;建立了上行信道和下行信道的單光子捕獲概率理論模型;針對低軌衛(wèi)星-地面站間激光鏈路,對單光子捕獲概率進行了分析.結(jié)果表明:上行信道的單光子捕獲概率強烈依賴于地面折射率結(jié)構(gòu)常數(shù)C_n~2(0),且隨著C_n~2(0)的增加而減小;然而,下行信道的單光子捕獲概率并不依賴于C_n~2(0),即大氣湍流對其沒有影響.
[Abstract]:The single photon source usually uses a highly attenuated laser pulse based on Gao Si beam, assuming that the laser beam has the initial Gao Si time-domain pulse waveform and the Temstack _ 01) mode Laguerre-#china_person2# spatial distribution. Based on the refractive index fluctuation, the Rytov approximation and modified von Karman spectral model are proposed. The influence of atmospheric turbulence on the single-photon capture probability of satellite-ground quantum communication is studied, the theoretical model of single-photon capture probability for uplink and downlink channels is established, and the laser link between Leo satellite and earth station is discussed. The single-photon capture probability is analyzed. The results show that the single-photon capture probability in uplink channel is strongly dependent on the refractive index structure constant C _ s _ n _ 2 / 0, and decreases with the increase of C _ (nn) _ 2 ~ (0). The single photon capture probability in the downlink channel is independent of the CnStack, that is, the atmospheric turbulence has no effect on it.
【作者單位】： 哈爾濱理工大學應用科學學院;
【基金】：The Natural Science Foundation of Heilongjiang Province of China(No.F200831) the Scientific Research Fund of Heilongjiang Provincial Education Department of China(No.12511119)
【分類號】：O413;TN918

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