The nature of the Hanle effect on laser-induced fluorescence (LIF) remains subtle and physically ambiguous. By associating the Hanle effect with the linearly superposed phase-locked excited substates induced by laser-like coherent light, this paper attempts to demystify its underlying physics. The resulting LIF radiation leads to angular distribution of radiation, whose detail depends on the quantum structure of the target atoms. Three simple quantum radiators are used to illustrate the fact that LIF could result in distributions ranging from that of spontaneous emission to that of a classical dipole oscillator. The radiation patterns of six Na D-2 and five Fe transitions of interest are presented. The nonunity backward enhancement q-factor of a transition alters its contribution proportionally to the received lidar signal; thus, it results in temperature and wind errors if this factor is ignored in data processing of Na and Fe Doppler lidars as well as of the Fe Boltzmann lidar; these errors are shown to be less than 1 K and 1 m/s. (C) 2019 Optical Society of America
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机译：Hanle效应对激光诱导的荧光（LiF）的性质仍然微妙，身体含糊不清。通过将Hanle效应与激光样的相干光引起的线性叠加的锁相激发代表相关联，本文试图将其底层物理脱模。所得到的LiF辐射导致辐射的角度分布，其细节取决于目标原子的量子结构。三个简单的量子辐射器用于说明LiF可以导致从自发发射到经典偶极振荡器的分布的事实。提出了六个Na D-2和五种感兴趣转变的辐射模式。过渡的unonity向后增强Q系数与接收的LIDAR信号成比例地改变其贡献;因此，如果在Na和Fe多普勒Lidars的数据处理以及Fe Boltzmann Lidar的数据处理中，它会导致温度和风误差;这些误差显示为小于1 k和1 m / s。 （c）2019年光学学会
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