It has a velocity width of about 10% and a height of more than 50% of the original effusive atomic beam. dye lasers, a narrow velocity ground-state barium atomic beam is prepared. As byproduct of this research, two experimental techniques are developed: a new velocity selection scheme for the barium atomic beam and a new simple multi-stop time-to- digital converter (MSTDC). This is anticipated because the average time an atom spends in the cavity mode is much smaller than the lifetime of a photon'in the cavity mode. The experimental results from our many-atom microlaser agree well with the predictions of the single-atom microlaser theory. The difference between the behavior of the microlaser for these two configurations can be attributed to the difference between their gain curves. On the other hand, for the traveling-wave configuration, the atom-cavity coupling is constant along the cavity mode axis.
In the standing-wave configuration, the atom-cavity coupling strength has a large variation depending on where an atom is injected in the cavity standing-wave mode.
Two configurations of the microlaser are explored. We study the output and the degree of the second-order coherence fmunction for a microlaser in which the average number of atoms inside the cavity mode is larger than one.
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