利用压致展宽测量铯气室内的压强

Testing of Cs vapor cell pressure using pressure broadening

在研究原子自旋极化时,需在碱金属气室充入适当的缓冲气体,但缓冲气体会导致谱线的增宽。介绍了充入适当氦气(He)的铯(Cs)原子气室的制作方法,采用DFB852 nm半导体激光器测量了纯Cs原子气室和充入一定量He气的Cs原子气室的吸收光谱,利用Cs原子饱和吸收谱来标定频率,得到铯(Cs)原子吸收光谱线的半峰值全宽度,分析了各种因素对线宽的影响,并利用谱线宽度推断气室内气体的压强值。

The buffer gas of alkali metal atom vapor cell will affect the alkali atom polarization and spectral line broadening.The method of making a Cs cell containing helium buffer gas is introduced.The pressure broadening of the Cs D2（852 nm） line with the buffer gas is measured using atomic saturated absorption spectrum.The pressure value would be obtained through analyzing absorption linewidth and broadening factors.