Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Quality of paraxial electromagnetic beams

Not Accessible

Your library or personal account may give you access

Abstract

The full wave theory of focused waves is developed and the radiation intensity distribution is determined. In the appropriate limit, the full wave theory correctly reproduces the paraxial beams. The limitations of paraxial beam theories are discussed. The method of treatment of full waves is presented with reference to the scalar Bessel–Gauss beam and wave. The necessary theoretical formulas for other beams and waves are also given. For the scalar Bessel–Gauss wave, the beam shape parameter can be adjusted to yield a flat-topped radiation pattern. The ratio of the power in the paraxial beam to that in the full wave is used as a parameter to measure the quality of the paraxial beam approximation. Lower-order waves are found to have better paraxial beam quality than do higher-order waves. The difference in the paraxial beam quality increases as kw0 is decreased where k is the wavenumber and w0 is the waist of the paraxial beam. The radiation patterns of waves are presented for some tightly focused waves.

© 2006 Optical Society of America

Full Article  |  PDF Article
More Like This
Electromagnetic modified Bessel-Gauss beams and waves

S. R. Seshadri
J. Opt. Soc. Am. A 25(1) 1-8 (2008)

Comment on “Quality of paraxial electromagnetic beams”

Omar El Gawhary and Sergio Severini
Appl. Opt. 47(21) 3767-3769 (2008)

Dynamics of the linearly polarized fundamental Gaussian light wave

S. R. Seshadri
J. Opt. Soc. Am. A 24(2) 482-492 (2007)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (92)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved