Journal
OPTICS COMMUNICATIONS
Volume 253, Issue 4-6, Pages 242-249Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2005.04.081
Keywords
hyperbolic-cosine-gaussian beams; focal shift; Huygens-Fresnel diffraction integral
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Based on the generalized Huygens-Fresnel diffraction integral the expression of the focused hyperbolic-cosine-Gaussian (ChG) beams is derived for any transverse plane in the focal region. The properties of the focused ChG beams and the focal shift are studied, and their dependence on the Fresnel number and the decentered parameter beta are illustrated with detailed numerical calculations. (c) 2005 Elsevier B.V. All rights reserved.
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