METHOD FOR MEASURING THE SPECTRAL PHASE OF A PERIODIC SIGNAL

摘要

The invention relates to a self-referenced device (1) for measuring the spectral phase of a periodic signal having a frequency f_p, the periodic signal being carried by an optical signal, comprising: a phase shifting means (4); a transmission means (3) for transmitting at least three optical modes of said periodic signal to the phase shifting means, said optical modes defining beats at the f_p frequency; the phase shifting means (4) being capable of modifying the phase difference between the beats at the f_p frequency; characterised in that the measuring means (6, 7, 8) include: photoelectric conversion means (6) for detecting the variable term at the f_p frequency of the optical signal received power in order to generate an electric signal (14) corresponding to the superimposition of the optical beats at the f_p frequency; electric measuring means (7, 8) for measuring the amplitude of the electric signal in order to determine the amplitude of the beats at the f_p frequency.