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

23rd International Laser Physics Workshop

Dakova, A.M.^1 ; Kovachev, L.M.^1 ; Kovachev, K.L.^1 ; Dakova, D.Y.^2

Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko shossee, Sofia

1784, Bulgaria^1

Faculty of Physics, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., Plovdiv

4000, Bulgaria^2

关键词: Analytical theory;    Attoseconds;    Broad bands;    Fraunhofer;    Intensity profiles;    Nonparaxial regimes;    Phase modulated;    Spectral widths;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/594/1/012023/pdf
DOI  :  10.1088/1742-6596/594/1/012023

来源: IOP

【 摘 要 】

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.