Fields generated by a Fabry–Perot interferometer with a phase-conjugate mirror

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Abstract
We study theoretically a Fabry-Perot interferometer with one phase-conjugate mirror. Comparisons with results previously obtained by Kastler [Appl. Opt. 1, 17 (1962)] for an ordinary Fabry-Perot interferometer are made. Specifically, we discuss the field intensity of the light both outside and inside the interferometer. We also study the intensity of the exterior field that is due to atoms radiating incoherently inside the interferometer. The operating characteristics below the threshold of the interferometer when it is filled with a gain medium are also analyzed and are found to be different from those of the ordinary interferometer. Finally, conditions are obtained under which the cavity can act as a regenerative amplifier.