Absolute absorption on rubidium D lines: comparison between theory and experiment
Absolute absorption on rubidium D lines: comparison between theory and experiment
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DOI：
10.1088/0953-4075/41/15/155004
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发表时间：
2008-08-14
影响因子：
1.6
通讯作者：
Hughes, Ifan G.
中科院分区：
文献类型：
--
作者：
Siddons, Paul;Adams, Charles S.;Hughes, Ifan G.
本文研究了弱单色探测光束在热铷蒸气池中D线的多普勒展宽吸收。详细的模型的磁化率的发展，考虑到允许的电偶极跃迁的绝对线强度和平行于探测光束的原子的运动。从两个超精细水平的两个同位素的地面项的所有过渡被纳入。作为频率的函数的吸收和折射率表示在互补误差函数方面。的绝对吸收曲线与实验进行了比较，并被发现是在良好的协议提供了一个足够弱的探测光束下的饱和强度的千分之一的强度。超精细泵浦的重要性，开放的过渡进行了讨论的背景下，实现弱探测极限。理论和实验结果显示出良好的一致性，在16.5 ℃时D-2线的均方根误差优于0.2%。
We study the Doppler-broadened absorption of a weak monochromatic probe beam in a thermal rubidium vapour cell on D lines. A detailed model of the susceptibility is developed which takes into account the absolute linestrengths of the allowed electric dipole transitions and the motion of the atoms parallel to the probe beam. All transitions from both hyperfine levels of the ground term of both isotopes are incorporated. The absorption and refractive index as a function of frequency are expressed in terms of the complementary error function. The absolute absorption profiles are compared with experiment, and are found to be in excellent agreement provided a sufficiently weak probe beam with an intensity under one-thousandth of the saturation intensity is used. The importance of hyperfine pumping for open transitions is discussed in the context of achieving the weak-probe limit. Theory and experiment show excellent agreement, with an rms error better than 0.2% for the D-2 line at 16.5 degrees C.