π/N expansion to the LP01 mode of a step-index N-sided regular-polygonal-core fiber

Naofumi KITSUNEZAKI

doi:10.1587/transele.2019REP0001

IEICE Transactions on Electronics

Online ISSN : 1745-1353
Print ISSN : 0916-8524

This article has now been updated. Please use the final version.

π/N expansion to the LP₀₁ mode of a step-index N-sided regular-polygonal-core fiber

Naofumi KITSUNEZAKI

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Keywords: step-index N-sided regular-polygonal-core fiber, N-fold rotational symmetry, parity symmetry, non-anomalous approximation of π/N expansion

JOURNAL RESTRICTED ACCESS Advance online publication

Article ID: 2019REP0001

DOI https://doi.org/10.1587/transele.2019REP0001

The final version of this article is now available: Vol. E103.C (2020), No. 1 pp. 3-10

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Abstract

Herein, we analytically derive the effective index and field distribution of the LP₀₁ mode of a step-index N-sided regular-polygonal-core fiber. To do this,we utilize the lowest-order non-anomalous approximation of the π/N expansion. These properties are also calculated numerically and the results are compared the with approximations.

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