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Institute of Optics

bar_yell

Coherent trapping of atomic populations

H. R. Gray, R. M. Whitley, and C. R. Stroud, Jr.

Opt. Lett. 3, 218 (1978).


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. The authors 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. They then study the effect with two dye lasers and an atomic beam and suggest possible ways to maximize the pumping efficiency.


Click here to download the .pdf version of the paper gray782.pdf (318 KB)


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Last modified 13 September 2006