Abstract: Disclosed in a method and arrangement for performing a spatially resolved non-collinear measurement of the autocorrelation function of the first or higher order by means of a matrix of beam shaping individual elements, such that there is a local splitting of the beam into a beam matrix of conical component beams, where each component beam represents spatially integrated information regarding the partial area of the matrix through which it passes, the interference resolution is thus determined by the matrix geometry, and the interference pattern produced in space by each component beam in a certain plane imaged on a matrix camera supplies an autocorrelation function of the first order or, by utilizing non-linear interactions in a suitable medium, of a higher order accordingly, so that the coherence time or the pulse period of individual laser pulses or trains of multiple laser pulses can be determined as a function of location.

Abstract: Disclosed in a method and arrangement for performing a spatially resolded non-collinear measurement of the autocorrelation function of the first pr higher order by means of a matrix of beam shaping individual elements, such that there is a local splitting of the beam into a beam matrix of conical component beams, where each component beam represents spatially integrated information regarding the partial area of the matrix through which it passes, the interference resolution is thus determined by the matrix geometry, and the interference pattern produced in space by each component beam in a certain plane imaged on a matrix camera supplies an autocorrelation function of the first order or, by utilizing non-linear interactions in a suitable medium, of a higher order accordingly, so that the coherence time or the pulse period of individual laser pulses or trains of multiple laser pulses can be determined as a function of location.