The use of a spectrally resolved interferometric correlation to analytically determine the phase of two unknown ultrashort laser pulses

In this paper we will describe a new technique that allows, for the first time, an analytical determination of the complex electric fields of two different pulses which have the same central frequency. This is done by performing a spectrally resolved analysis, in the Fourier domain, of a collinear cross-correlation. Blind-MEFISTO has the additional advantages in that it enables a simple extraction of pulse information without the need of an iterative retrieval algorithm and without having some of the ambiguities that are present in other techniques.