Fiber and integrated optics

Use of the offset method in an analysis of a non-Gaussian field distribution in single-mode fiber waveguides

A. V. Belov, A. S. Kurkov, A. V. Chikolini


Abstract: An offset method is modified to allow an analysis of the distribution of fields in a single-mode fiber waveguide without recourse to the Gaussian approximation. A new approximation for the field is obtained for fiber waveguides with a step refractive index profile and a special analysis employing the Hankel transformation is applied to waveguides with a distributed refractive index. The field distributions determined by this method are compared with the corresponding distributions calculated from the refractive index of a preform from which the fibers are drawn. It is shown that these new approaches can be used to determine the dimensions of a mode spot defined in different ways and to forecast the dispersion characteristics of single-mode fiber waveguides.

UDC: 621.372.029.7

PACS: 42.81.Qb, 42.81.Dp, 42.60.Jf, 02.30.Mv, 02.30.Uu

Received: 06.06.1989

 English version: Soviet Journal of Quantum Electronics, 1990, 20:8, 977–980

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