Spectral Narrowing of Atomic Resonance by Recurrent Excitation Spectroscopy: Feedback from Atom to Radiation Field via Digital-Data Processing
Spectral Narrowing of Atomic Resonance by Recurrent Excitation Spectroscopy: Feedback from Atom to Radiation Field via Digital-Data Processing
复制标题
通过循环激发光谱缩小原子共振的光谱：通过数字数据处理从原子到辐射场的反馈
DOI：
10.1143/jjap.38.923
复制
发表时间：
1999
影响因子：
1.5
通讯作者：
K. Sakurai
中科院分区：
文献类型：
--
作者：
T. Mitsui;T. Kinugawa;K. Sakurai
介绍了循环激发光谱（RES）的理论分析和实验细节，有助于精确测定原子共振频率。RES的基本思想在于辐射对原子系统的迭代激发。在前一激励过程中，原子发出的输出场以数字数据的形式记录下来，并根据这些数据产生下一激励场。这种原子系统与辐射场之间的周期性相互作用显著地减小了原子共振的谱宽，而信噪比仍然足够高。为了反映实际实验情况，我们建立了背景白噪声存在下的理论模型，并利用该模型进行了解析和数值计算。我们发现，与传统的平均技术相比，RES具有更好的信噪比，直到频谱缩小终止。将RES与数字数据处理技术相结合，成功地应用于亚mhz区域Rb原子的磁共振，实验证实了我们的理论发现。
We describe the theoretical analysis and experimental detail of recurrent excitation spectroscopy (RES), which contributes to precise determination of atomic resonance frequency. The basic idea of RES lies in the iterative excitation of the atomic system by radiation. During the preceding excitation, the output field emitted from the atom is recorded in the form of digital data, and the next excitation field is generated in accordance with these data. This recurrent interaction between the atomic system and the radiation field significantly reduces the spectral width of the atomic resonance, while the signal-to-noise ratio remains sufficiently high. To reflect the actual experimental situation, we present a theoretical model in the presence of background white noise, and using this model, analytical and numerical calculations are performed. We find that RES gives a better signal-to-noise ratio compared to the conventional averaging technique until spectral narrowing is terminated. The combination of RES and the digital-data processing technique has been successfully applied to the magnetic resonance of Rb atoms in the sub-MHz region, where our theoretical findings are experimentally confirmed.