Patent AT-E401557-T1: [Translated] METHOD FOR DETERMINING AN AUTOCORRELATION FUNCTION

A method for determining the autocorrelation function q(tau) of an optical signal, including the steps of: determining the times (ti) of occurrence of pulses corresponding to photons: calculating, for a predetermined set of pulses (w), the function s(w)=Sigma<SUB>i</SUB><SUP>e</SUP><SUP><SUP2>-jwti</SUP2></SUP>, where e-jwti=coswti+jsinwti, the summing-up being performed over all the received pulses determining square S(w) of the module of function s(w), and calculating the Fourier transform g(tau) of power spectrum S(w) for a predetermined set of time interval values.