The dynamic Stark effect on the as Q(5,4) transition of the 0 → 1 vibrational band of the ν_2 mode of ammonia ~(15)NH_3 was studied by the method of copropagating waves of radiation of two ~(13)CO_2 lasers operating at the R(18)_I line. For waves with mutually orthogonal polarizations, which propagated in a waveguide cell, the intensity of the saturating radiation reached 225 W/cm~2, and the absorption line of the probing radiation had the form of a two-hump curve with a splitting that was consistent with the Rabi frequency for the ammonia transition being investigated. At the maximum intensity of the saturating radiation, complete transparency was observed at the center of the absorption line of ~(15)NH_3. When identically polarized saturating and probing waves propagating in a cell at a small angle with respect to each other wave used, the splitting was more weakly manifested. The effect of a spatial inhomogeneity of the optical fields on the shape of the line of saturated absorption is discussed.
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机译：用两个〜（13）CO_2激光的辐射波共传播的方法研究了氨〜（15）NH_3的ν_2模式的0→1振动带的Q（5,4）跃迁的动态Stark效应。在R（18）_I行上运行。对于在波导单元中传播的具有相互正交的极化的波，饱和辐射的强度达到225 W / cm〜2，探测辐射的吸收线呈两峰曲线的形式，其分裂为与研究的氨转化的拉比频率一致。在饱和辐射的最大强度下，在〜（15）NH_3的吸收线中心观察到完全透明。当相同极化的饱和波和探测波相对于所用的其他波以较小的角度在一个单元中传播时，分裂更加不明显。讨论了光场的空间不均匀性对饱和吸收线形状的影响。
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