We report experimentally the properties of the hyperfine spectra in ${\mathrm{\text{5S}}}_{1/2}(F=2)$–${\mathrm{\text{5P}}}_{3/2}(F^{\prime }=2,3)$–${\mathrm{\text{5D}}}_{3/2}(F^{\prime \prime }=1,2,3)$ transitions of ${}^{87}$Rb. When the frequency of the coupling field is fixed between ${\mathrm{\text{5P}}}_{3/2}(F^{\prime }=3)$–${\mathrm{\text{5D}}}_{3/2}(F^{\prime \prime }=3)$ transition and the probe scans the ${\mathrm{\text{5S}}}_{1/2}(F=2)$–${\mathrm{\text{5P}}}_{3/2}$ transitions, two-photon absorption (TPA) and electromagnetically induced transparent (EIT) peaks could be investigated simultaneously, and the amplitude of the peaks can be controlled by changing the temperature of rubidium atomic vapor cell and the probe field power. In particular, the probe field power plays a dual role in controlling the amplitude of the peaks. In the ${\mathrm{\text{5S}}}_{1/2}(F=2)$–${\mathrm{\text{5P}}}_{3/2}(F^{\prime }=2)$–${\mathrm{\text{5D}}}_{3/2}(F^{\prime \prime }=1,2,3)$ transitions with the open intermediate state ${\mathrm{\text{5P}}}_{3/2}(F^{\prime }=2)$, with decrease of the coupling field power, our experimental results show a crossover from a convoluted line-shape to EIT when the probe is weak whereas a transformation from a convoluted line-shape to TPA with an enhanced probe power. Formation of the convoluted line-shape is explained by virtue of the dressed energy-level diagram.

我们通过实验报告了超精细光谱的性质 ${\mathrm{\text{5S}}}_{\mathrm{1个}/\mathrm{2个}}（F=\mathrm{2个}）$–${\mathrm{\text{5P}}}_{3/\mathrm{2个}}（F^{\prime }=\mathrm{2个}，3）$–${\mathrm{\text{5D}}}_{3/\mathrm{2个}}（F^{\prime \prime }=\mathrm{1个}，\mathrm{2个}，3）$ 的过渡 ${}^{87}$b 当耦合场的频率固定在${\mathrm{\text{5P}}}_{3/\mathrm{2个}}（F^{\prime }=3）$–${\mathrm{\text{5D}}}_{3/\mathrm{2个}}（F^{\prime \prime }=3）$ 过渡并且探针扫描 ${\mathrm{\text{5S}}}_{\mathrm{1个}/\mathrm{2个}}（F=\mathrm{2个}）$–${\mathrm{\text{5P}}}_{3/\mathrm{2个}}$可以同时研究跃迁，双光子吸收（TPA）和电磁感应透明（EIT）峰，并且可以通过改变of原子蒸气室的温度和探针场功率来控制峰的幅度。特别地，探针场功率在控制峰的振幅中起着双重作用。在里面${\mathrm{\text{5S}}}_{\mathrm{1个}/\mathrm{2个}}（F=\mathrm{2个}）$–${\mathrm{\text{5P}}}_{3/\mathrm{2个}}（F^{\prime }=\mathrm{2个}）$–${\mathrm{\text{5D}}}_{3/\mathrm{2个}}（F^{\prime \prime }=\mathrm{1个}，\mathrm{2个}，3）$ 处于开放中间状态的过渡 ${\mathrm{\text{5P}}}_{3/\mathrm{2个}}（F^{\prime }=\mathrm{2个}）$，随着耦合场功率的减小，我们的实验结果表明，当探针较弱时，从盘绕线形到EIT的交点，而具有增强的探针功率从盘绕线形到TPA的转变。通过修整的能级图解释了回旋线形的形成。