Anomalous spectral behavior of vectorial apertured ultrashort pulsed beams beyond the paraxial approximation
Based on the vectorial Rayleigh diffraction integrals, the analytical expression for the spectral intensity of a vectorial nonparaxial ultrashort pulsed Gaussian beam diffracted at a circular hard-aperture is derived. The effect of f-parameter ( f = 1/ k 0 w 0) on the spectral anomalies near phase s...
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Published in | Optics communications Vol. 281; no. 4; pp. 521 - 526 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.02.2008
Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | Based on the vectorial Rayleigh diffraction integrals, the analytical expression for the spectral intensity of a vectorial nonparaxial ultrashort pulsed Gaussian beam diffracted at a circular hard-aperture is derived. The effect of
f-parameter (
f
=
1/
k
0
w
0) on the spectral anomalies near phase singularities of the vectorial nonparaxial ultrashort pulsed beams is studied. It is shown that the spectral switch near the phase singularity of diffracted vectorial nonparaxial ultrashort pulsed beam still exists beyond paraxial regime, but disappears when the
f-parameter is larger than a certain value. |
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ISSN: | 0030-4018 1873-0310 |
DOI: | 10.1016/j.optcom.2007.10.020 |