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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: Stephen A. Burns
  • Vol. 25, Iss. 6 — Jun. 1, 2008
  • pp: 1307–1318

Effect of primary spherical aberration on high-numerical-aperture focusing of a Laguerre–Gaussian beam

Rakesh Kumar Singh, P. Senthilkumaran, and Kehar Singh  »View Author Affiliations


JOSA A, Vol. 25, Issue 6, pp. 1307-1318 (2008)
http://dx.doi.org/10.1364/JOSAA.25.001307


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Abstract

Effect of primary spherical aberration on the tight focusing of linearly and circularly polarized Laguerre–Gaussian (LG) beams is studied by using the vectorial Debye integral. Results are presented for the intensity distribution and square of the polarization components. In the case of the linearly polarized LG beam with unit and double topological charge, the presence of aberration reduces the residual intensity at the focal point and spreads the sidelobes. If the beam is circularly polarized, the aberration results in an increase in the size of the dark core along with a reduction in the intensity at the periphery of the bright ring. The effect of aberration is also discussed in the context of the fluorescent spot size in the focal plane of a stimulated-emission-depletion microscope.

© 2008 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(170.2520) Medical optics and biotechnology : Fluorescence microscopy
(260.5430) Physical optics : Polarization
(080.4865) Geometric optics : Optical vortices

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 17, 2008
Manuscript Accepted: March 14, 2008
Published: May 14, 2008

Virtual Issues
Vol. 3, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Rakesh Kumar Singh, P. Senthilkumaran, and Kehar Singh, "Effect of primary spherical aberration on high-numerical-aperture focusing of a Laguerre-Gaussian beam," J. Opt. Soc. Am. A 25, 1307-1318 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-6-1307


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