Theory of light detection in the presence of feedback
JOSA B, Vol. 4, Issue 10, pp. 1604-1620 (1987)
http://dx.doi.org/10.1364/JOSAB.4.001604
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Abstract
The usual open-loop quantum and semiclassical theories of light detection are extended toinclude closed-loop operation in which there is feedback from the detector to the source. It is shown that the unmistakable signatures of nonclassical light associated with open-loop detection, such as sub-shot-noise spectra and sub-Poisson photocounts, do not carry over to closed-loop systems. This behavior is illustrated through quantitatively indistinguishable quantum and semiclassical analyses of two recent closed-loop experiments in which sub-Poisson photocount statistics were produced. It turns out that if the open-loop illumination does not require the use of quantum photodetection theory, then neither does the closed-loop illumination. Conversely, if the open-loop illumination is nonclassical, then the closed-loop behavior must be analyzed quantum mechanically. The use of nonclassical field correlations to obtain light beams that give sub-Poisson open-loop photocounts from these closed-loop arrangements is discussed and generalized into a synthesis procedure for producing light beams with arbitrary open-loop photocount statistics.
© 1987 Optical Society of America
Citation
J. H. Shapiro, G. Saplakoglu, S.-T. Ho, P. Kumar, B. E. A. Saleh, and M. C. Teich, "Theory of light detection in the presence of feedback," J. Opt. Soc. Am. B 4, 1604-1620 (1987)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-4-10-1604
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