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A comparative study of the propagation of vectorial nonparaxial beams in the use of different approaches

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Starting from the vectorial Rayleigh diffraction integral formula and using a simple expansion of the nucleus in the Rayleigh formula, an analytical propagation equation of vectorial nonparaxial Gaussian beams in free space is derived, which permits us to perform numerical calculations in comparison with the expression derived by Ciattoni et al. and with the direct numerical integration of the Rayleigh formula. It is found that as usual the use of expansion of vectorial Rayleigh diffraction integral is sufficient to provide satisfactory numerical results as compared with the direct integration of the Rayleigh formula. The above two analytical expressions are valid under certain conditions, however both are applicable in the far field.
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Document Type: Research Article

Affiliations: 1: College of Physics & Communication Electronics, Jiangxi Normal University, Nanchang, 330027, China 2: Institute of Laser Physics & Chemistry, Sichuan University, Chengdu, 610064, China

Publication date: 01 August 2004

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