薄铷汽室饱和吸收光谱的研究

Research of thin Rb vapor cell′s saturated absorption spectroscopy

高性能的频率基准在民用、军事领域得到广泛应用。饱和吸收光谱技术是减小多普勒加宽,获得高性能原子钟的有效手段。本文介绍了原子汽室饱和吸收研究的实验装置和实验结果,发现原子汽室必须在适当温度下才能获得明显的饱和吸收光谱。对300μm厚度的铷汽室,50℃时其饱和吸收的相对强度最高,交叉共振峰的相对强度比50 mm厚铷汽室明显减小,分析并解释了减小的原因。实验结论对微型高性能原子钟的研究具有参考价值。

Freqnency standard is a key device in many civil and military applications.Saturated absorptian can minimize the Doppler expansion and lead to high performance frequency standard.An experimental equipment to study the saturated absorption in Rb vapor cell is described in this paper.Experimet result shows that saturated absorption has a optimal temperature under which biggest absorption occurs.For a 300 μm vaper sell,50 ℃ temporature is appropriate.Experiment also shows that the redative intensity of crossover resoncmce of the 300 μm cell is smaller than the 50 mm cell.Analysis and explanation about the phenomenon is made.The experiment and the conclusicn is of reference value for the research of atom clock.