Abstract The coherent forward scattering (CFS) spectra of Cs I 852.1-nm line was measured using a CFS spectrometer in a Voigt configuration with an electromagnet and temperature-controlled Cs gas cell. A light-emitting diode (LED) and a diode laser (DL) were used as broadband and narrowband light sources, respectively. The relation of the CFS intensity and external magnetic field (B) was log–log plotted. Results showed that the CFS signal intensities depend on B to the power of 1.69 ± 0.38 and 1.51 ± 0.06 for DL and LED, respectively. A higher external magnetic field should be favorable when a broadband light source is used. However, the CFS signal decreased with an LED source as B approached 300 mT. To explain this observation, the hyperfine Paschen–Back splitting pattern of the Cs I 852.1-nm transition was calculated. The decrease in the CFS signal was caused by the level-crossing of π- and σ-components of the Cs I 852.1-nm transition in a Voigt configuration.

中文翻译：

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使用 Voigt 配置的发光二极管和二极管激光器的 Cs I 852.1-nm 的相干前向散射光谱

摘要 Cs I 852.1 nm 谱线的相干前向散射 (CFS) 光谱是使用具有电磁铁和温控 Cs 气室的 Voigt 配置的 CFS 光谱仪测量的。分别使用发光二极管 (LED) 和二极管激光器 (DL) 作为宽带和窄带光源。CFS 强度和外部磁场 (B) 的关系是对数-对数绘制的。结果表明，对于 DL 和 LED，CFS 信号强度取决于 B，分别为 1.69 ± 0.38 和 1.51 ± 0.06 的幂。当使用宽带光源时，较高的外部磁场应该是有利的。然而，当 B 接近 300 mT 时，CFS 信号随着 LED 源而下降。为了解释这一观察结果，计算了 Cs I 852.1-nm 跃迁的超精细 Paschen-Back 分裂模式。