Gray H R, Whitley R M, Stroud C R
Opt Lett. 1978 Dec 1;3(6):218-20. doi: 10.1364/ol.3.000218.
It is often desirable in laser spectroscopy and isotope separation to extract as much as possible of an atomic or molecular population that is distributed among a number of ground-state sublevels and low-lying metastable levels. We describe a form of coherent trapping that occurs when multiple resonant laser beams are used to couple the various ground states to a common upper level. This effect prevents the extraction of the entire population. We then study the effect with two dye lasers and an atomic beam and suggest possible ways to maximize the pumping efficiency.
在激光光谱学和同位素分离中，通常希望尽可能多地提取分布在多个基态子能级和低激发亚稳能级之间的原子或分子粒子数。我们描述了一种相干俘获形式，当使用多个共振激光束将各种基态耦合到一个共同的高能级时就会发生这种情况。这种效应会阻止整个粒子数的提取。然后我们用两台染料激光器和一束原子束研究了这种效应，并提出了使泵浦效率最大化的可能方法。
