Fraunhofer type diffraction of phase-modulated broad-band femtosecond pulses

Abstract

Attosecond optical pulses with one-two cycles under the envelope diffract in nonparaxial regime on several diffraction lengths. Their intensity profile takes a form similar to Fraunhofer distribution. An analytical theory was developed, where was pointed, that such type of diffraction depends on the spectral width of the optical pulse. In this paper is shown that even for a broad-band phase-modulated femtosecond pulses the diffraction is also of Fraunhofer type.