Increase of the minor field component in stress-induced birefringent fibers, due to nonuniformity of stress
- 1 January 1987
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 5 (1) , 24-28
- https://doi.org/10.1109/jlt.1987.1075415
Abstract
Analytical evaluations of the minorx-component of a LPO1 mode polarized alongy-axis in strongly birefringent optical fibers are proposed, for weakly guiding step-index fibers. In the assumption where the\bar{\bar{\epsilon}}-tensor is everywhere diagonalized inx-y-zaxes, it is shown that the anisotropy has little effect on the minor component and that the polarization ratio (Expower/Eypower) remains within a few decibels from its value in an isotropic fiber. A considerably larger change can be predicted from a more realistic analysis of real birefringent fibers, taking into account the nonuniformity of the stress which produces the birefringence; this nonuniformity makes off-diagonal coordinates-dependent terms to appear in the\bar{\bar{\epsilon}}-tensor. A recent experimental report can thus be explained.Keywords
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