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Matching of a Gaussian beam into hollow oversized circular waveguides

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Abstract

A Gaussian beam entering an hollow oversized circular waveguide of dielectric or low-conductivity wall material is considered: a simple formula giving the optimal beam charac-teristics for the lowest losses in the guide is derived from an optical theory. This optimization depends on the geometry and the wall material of the guide. The formula is valid for small beam diameters at the guide entrance and for low losses inside the guide, which are conditions corresponding to usual cases. Physical interpretations are given. Comparisons with some experimental results show a good agreement with the theory. These results are of interest for waveguides lasers and waveguide transmission lines.

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Authors and Affiliations

  1. Laboratory de Dispositifs Infrarouge, Université Paris VI, 4, Place Jussieu, F-75252, Paris Cedex 05, France

    Pierre Belland

  2. Tore Supra CEN Cadarache, Association EUR-CEA sur la Fusion Controlee, F-13108, St Paul lez Durance, France

    Jean Pierre Crenn

Authors
  1. Pierre Belland
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  2. Jean Pierre Crenn
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Belland, P., Crenn, J.P. Matching of a Gaussian beam into hollow oversized circular waveguides. Int J Infrared Milli Waves 10, 1279–1287 (1989). https://doi.org/10.1007/BF01009253

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  • DOI: https://doi.org/10.1007/BF01009253

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