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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 27, Iss. 3 — Mar. 1, 2010
  • pp: 578–584

Composite polarization singularities in superimposed Laguerre–Gaussian beams beyond the paraxial approximation

Yamei Luo and Baida Lü  »View Author Affiliations


JOSA A, Vol. 27, Issue 3, pp. 578-584 (2010)
http://dx.doi.org/10.1364/JOSAA.27.000578


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Abstract

The closed-form expression for the free-space propagation of superimposed Laguerre–Gaussian beams beyond the paraxial approximation is derived, and the composite polarization singularities formed by the transverse and longitudinal electric-field components are studied in detail. It is shown that there exist composite C-points and L-lines in vector nonparaxial fields. By suitably varying a control parameter, such as the off-axis distance, relative phase, or amplitude ratio, the motion, creation, and annihilation of composite C-points may appear, and in the process the sum of topological charge remains unchanged. The shift, deformation, combination, and disappearance of composite L-lines may take place. The topological relationship holds true. The results are compared with the previous work.

© 2010 Optical Society of America

OCIS Codes
(260.5430) Physical optics : Polarization
(140.3298) Lasers and laser optics : Laser beam combining
(260.6042) Physical optics : Singular optics

ToC Category:
Physical Optics

History
Original Manuscript: December 18, 2009
Revised Manuscript: January 13, 2010
Manuscript Accepted: January 13, 2010
Published: February 25, 2010

Citation
Yamei Luo and Baida Lü, "Composite polarization singularities in superimposed Laguerre-Gaussian beams beyond the paraxial approximation," J. Opt. Soc. Am. A 27, 578-584 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-3-578

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