基于光抽运技术的铯原子双共振光谱特性分析实验

Experimental Tests on Double Resonance Spectrum Characteristics of Cesium Atom Based on Optical Pumping Technology

目前针对铯原子双共振光谱特性的分析精度较差,且观测结果没有统一标准,导致铯原子双共振光谱特性分析结果不准确,为此提出基于光抽运技术的铯原子双共振光谱特性分析实验.改进Cs原子管,利用激光器产生溅射光源和激发光源,形成双共振光束,基于光抽运技术,调整激光束偏振特性,激发Cs管原子束发射光谱,并对光抽运双共振光谱进行模拟,分析其光谱特性.实验结果表明,铯原子光谱谱线强度发生变化,相比双共振和平行光栅光谱,光谱谱线在时间演化和空间分布等方面,强度都有所增强.光抽运技术将Cs原子束的冲击波偏振控制在一定范围内,获得了中间激发态与更高激发态的跃迁谱线,增强了光谱谱线强度,使铯原子光谱具备了窄线宽、高信噪比的特性.

At present,the analytical accuracy of the double resonance spectral characteristics of cesium atom is poor,and there is no unified standard for the observation results,which leads to inaccurate analysis results.Therefore,this paper proposes an experiment based on optical pumping technology to analyze the double resonance spectral characteristics of cesium atom.Based on the optical pumping technology,the polarization characteristics of laser beam are adjusted to excite the atomic beam emission spectrum of Cs tube.The optical pumping double resonance spectrum is simulated and analyzed.The experimental results show that,compared with the double resonance and parallel grating spectra,the intensity of the spectral lines of cesium atom is enhanced in time evolution and spatial distribution.Optical pumping technology can control the shock wave polarization of Cs atom beam in a certain range,obtain the transition spectrum line between intermediate excited state and higher excited state,enhance the spectral line intensity,and make the cesium atomic spectrum have the characteristics of narrow line width and high signal-to-noise ratio.