Abstract
The basic model considered in this paper is a single atom inside an optical cavity. We consider both three- and four-level atomic systems and use incoherent pumping for both. We present numerical results of the laser linewidth and the second-order intensity correlation function. These results are obtained with use of the quantum trajectory method, using the formalism of Carmichael.1 Previous work has shown that a single-atom laser is tenable if the atom-field coupling strength g is large enough.2 We have previously3 examined the behavior of such a device as β, the fraction of spontaneous emission into the laser cavity, is altered. It was found that for small β (<0.1) the laser could be well described by a semiclassical theory with no amplitude squeezing and a well-defined threshold, while for larger values of β the fully quantum theory was needed.
© 1996 Optical Society of America
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