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Fields of a Gaussian beam beyond the paraxial approximation

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Abstract

Analytic expressions for the fields of a tightly focused Gaussian laser beam are derived, accurate to ε11, where ε is the diffraction angle. It is found that, for example, using the derived fields, the calculated power can be about 25% more accurate than when calculated using the paraxial approximation for a beam focused down to a waist radius w0∼0.4λ, where λ is the wavelength.

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Authors and Affiliations

  1. Physics Department, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates

    Y.I. Salamin

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  1. Y.I. Salamin
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Correspondence to Y.I. Salamin.

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PACS

42.65.-k; 42.50.Vk; 52.75.Di

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Salamin, Y. Fields of a Gaussian beam beyond the paraxial approximation. Appl. Phys. B 86, 319–326 (2007). https://doi.org/10.1007/s00340-006-2442-4

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  • DOI: https://doi.org/10.1007/s00340-006-2442-4

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