We present two new techniques for estimating the autocorrelation function, based on the measurement of the mean number of clipped photocounts and on the calculation of the second-order factorial moment of a series of clipped data. The first procedure has the advantage of simplicity, although it produces a poor signal-to-noise ratio. On the other hand, the second technique gives a very good signal-to-noise ratio, when compared with other known methods.
© 1994 Optical Society of America
Original Manuscript: October 27, 1993
Published: April 15, 1994
M. P. Cagigal, P. Prieto, and L. Vega, "Autocorrelation evaluation from clipped photon detection," Opt. Lett. 19, 584-586 (1994)