Intensity correlations of thermal light
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- Iskhakov, T., Allevi, A., Kalashnikov, D.A. et al. Eur. Phys. J. Spec. Top. (2011) 199: 127. doi:10.1140/epjst/e2011-01508-x
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We demonstrate measurement of normalized Glauber’s intensity correlation functions of different orders using an array photodetector. As the light source, we use a laser beam scattered by a rotating ground-glass disc, which has statistics close to that of thermal light. We compare the measurements of the normalized correlation functions to that of the difference-intensity variance and show that they are in a certain sense complementary. The independence of the variance measurement on the number of temporal modes has been demonstrated for the first time. Different versions of high-order ghost imaging are also realized and characterized quantitatively.