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High-contrast coherent population trapping based on crossed polarizers method

机译:基于交叉偏振器方法的高对比度相干种群捕获

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A method based on crossed polarizers to observe high-contrast coherent population trapping (CPT) resonance has been developed. Because crossed polarizers have a simple optical system, our method is suitable for chip-scale atomic clocks (CSACs). In CPT, the Faraday rotation in a linearly polarized light field (lin||lin) was calculated using two pairs of Λ-system models; the spectrum of the Faraday rotation is also estimated. After measuring the contrast and linewidth with the crossed-polarizer method, a comparison of the theoretical model and experimental data showed they were in good agreement. Moreover, the experimental results showed that a high contrast (88.4%) and narrow linewidth (1.15 kHz) resonance could be observed using a Cs gas cell and D-line verticalcavity surface-emitting laser (VCSEL).
机译:已经开发了一种基于交叉偏振器观察高对比度相干种群捕获(CPT)共振的方法。由于交叉偏振器具有简单的光学系统,因此我们的方法适用于芯片级原子钟(CSAC)。在CPT中,使用两对Λ系统模型计算线偏振光场(lin || lin)中的法拉第旋转;还估算了法拉第旋转的频谱。用交叉偏振器法测量对比度和线宽后,将理论模型与实验数据进行比较,表明两者吻合良好。此外,实验结果表明,使用Cs气室和D线垂直腔面发射激光器(VCSEL)可以观察到高对比度(88.4%)和窄线宽(1.15 kHz)共振。

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