P. Prieto et al., THE MEASUREMENT OF THE PROBABILITY DENSITY AS A METHOD FOR EVALUATINGTHE AUTOCORRELATION FUNCTION, Optics communications, 99(5-6), 1993, pp. 360-364
At low light levels it is possible to obtain an estimation of the auto
correlation function from the measurement of the photocount probabilit
y density. This is a fast easy-to-perform method, even though the SNR
obtained is smaller than that obtained from a direct measurement of th
e autocorrelation function. Experimental measurements have been used t
o check the theoretical predictions.