论文标题
在暗谐振的调制光谱和降低方法中，误差信号频移的强度非线性
Intensity nonlinearity of the error-signal frequency shift in the modulation spectroscopy of dark resonances and approaches to its reduction
论文作者
论文摘要
我们发现，与相干种群捕获共振相对应的误差信号频率可以从光场不受干扰的“ $ 0-0 $”过渡中取代，尽管该频率对其强度的变化不敏感。我们考虑与非对称多色光场相互作用的双$λ$ - 系统，以证明由于误差信号频率移动的强度非线性而产生这种效果。用$^{87} $ rb原子中的AR-N $ _2 $缓冲气体原子电池中的实验显示了位移值如何取决于不同的参数。讨论了影响对时钟频率稳定性和可重复性的可能影响。
We have found that the error-signal frequency corresponding to the coherent population trapping resonance can be displaced from that of "$0-0$" transition unperturbed by the optical field, although the frequency is not sensitive to changes in its intensity. We consider the double $Λ$-system of levels interacting with the asymmetric polychromatic optical field to demonstrate that this effect arises due to intensity nonlinearity of the error-signal frequency shift. The experiment with $^{87}$Rb atoms in Ar-N$_2$ buffer gas atomic cell shows how the displacement value depends on different parameters. The possible influence of the effect on the clocks' frequency stability and reproducibility are discussed.
