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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 20 — Sep. 27, 2010
  • pp: 20817–20826

Beam width of highly-focused radially-polarized fields

R. Martínez-Herrero, P. M. Mejías, and A. Manjavacas  »View Author Affiliations

Optics Express, Vol. 18, Issue 20, pp. 20817-20826 (2010)

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On the basis of a formal analogy with the irradiance moments, analytical definitions are proposed for the width of both the transverse and the longitudinal component of rotationally-symmetric radially-polarized fields at the focal plane of a high-focusing optical system. The beam width of the whole field is also introduced. The transverse beam size is thus associated with the overall spatial structure of the field. The beam-width definitions are applied to an illustrative example, which enables us to show that, at the focal plane, the power contained within a circle whose radius is given by the proposed beam widths represents the main part of the total power.

© 2010 OSA

OCIS Codes
(260.5430) Physical optics : Polarization
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:
Physical Optics

Original Manuscript: July 23, 2010
Revised Manuscript: August 17, 2010
Manuscript Accepted: August 17, 2010
Published: September 16, 2010

R. Martínez-Herrero, P. M. Mejías, and A. Manjavacas, "Beam width of highly-focused radially-polarized fields," Opt. Express 18, 20817-20826 (2010)

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