Open AccessThe far-field properties of ultrashort pulsed beams with constant waist width in free space
Author(s) -
Qing Zou,
Lü Bai-Da
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.5642
Subject(s) - angular spectrum method , physics , optics , ultrashort pulse , gaussian , redshift , field (mathematics) , constant (computer programming) , diffraction , laser , astrophysics , galaxy , quantum mechanics , mathematics , computer science , pure mathematics , programming language
By using the angular spectrum and complex analytic signal representations, the analytic propagation expression and its Fourier spectrum for ultrashort Gaussian pulsed beams with constant waist width in the far field are derived. The far-field properties of few- and single-cycle ultrashort Gaussian pulsed beams with constant waist width are studied, and compared with those of ultrashort Gaussian pulsed beams with constant diffraction length. The properties of pulse broadening, spectrum narrowing, off-axis spectrum redshift and on-axis spectrum blueshift are found for ultrashort Gaussian pulsed beams with constant waist width in the far field.