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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 33, Iss. 1 — Jan. 1, 2008
  • pp: 49–51

Focusing of partially coherent Bessel–Gaussian beams through a high-numerical- aperture objective

Zhiming Zhang, Jixiong Pu, and Xiqing Wang  »View Author Affiliations


Optics Letters, Vol. 33, Issue 1, pp. 49-51 (2008)
http://dx.doi.org/10.1364/OL.33.000049


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Abstract

The focusing properties of partially coherent Bessel–Gaussian beams passing through a high-numerical-aperture objective are studied based on vectorial Debye theory. Expressions for the intensity distribution, degree of coherence μ , and degree of polarization P are derived near the focus. Numerical calculations are performed to analyze the influences of varying corresponding parameters on the intensity distribution, μ , and P in the focal region. It is shown that the intensity, μ , and P in the focal region are all influenced by varying the effective coherent length L c of incident beams and maximal angle α determined by the numerical aperture of the objective. Also, the linearly polarized incident field is found to be depolarized after it is focused by a high-numerical-aperture objective.

© 2008 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(260.6042) Physical optics : Singular optics

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: October 22, 2007
Revised Manuscript: November 19, 2007
Manuscript Accepted: November 19, 2007
Published: December 19, 2007

Citation
Zhiming Zhang, Jixiong Pu, and Xiqing Wang, "Focusing of partially coherent Bessel-Gaussian beams through a high-numerical-aperture objective," Opt. Lett. 33, 49-51 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-1-49


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