FIELD: physics, optics.
SUBSTANCE: method relates to laser engineering and can be used to design a device for direct self-referential determination of the coefficient of quadratic phase modulation of an ultra-short optical pulse. The method of determining the coefficient of quadratic phase modulation of an ultra-short optical pulse includes directing a phase-modulated ultra-short pulse to be analysed onto a double-beam interferometer, wherein the time shift between interfering pulses in the interferometer is less than the duration thereof; using an autocorrelator to detect the generated sequence and determining the coefficient of quadratic phase modulation from the number of said sub-pulses and duration of the entire sequence.
EFFECT: easy determination of the coefficient of quadratic modulation.
4 dwg
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