基于拉盖尔-高斯光束的单光子捕获概率研究（英文）

发布时间：2018-03-10 04:11

本文选题：单光子捕获概率　切入点：拉盖尔-高斯光束　出处：《光子学报》2017年01期 　论文类型：期刊论文

【摘要】：单光子源通常采用基于高斯光束的高度衰减激光脉冲,假设激光束具有初始高斯时域脉冲波形和TEM_(01)模拉盖尔-高斯空域分布.基于折射率起伏的Rytov近似和修正von Karman谱模型,研究了大气湍流对星地量子通信单光子捕获概率的影响;建立了上行信道和下行信道的单光子捕获概率理论模型;针对低轨卫星-地面站间激光链路,对单光子捕获概率进行了分析.结果表明:上行信道的单光子捕获概率强烈依赖于地面折射率结构常数C_n~2(0),且随着C_n~2(0)的增加而减小;然而,下行信道的单光子捕获概率并不依赖于C_n~2(0),即大气湍流对其没有影响.
[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.
【作者单位】：哈尔滨理工大学应用科学学院;
【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)
【分类号】：O413;TN918

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