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Optical Engineering

Model of an axially strained weakly guiding optical fiber modal pattern
Author(s): Claudio Oliveira Egalon; Robert S. Rogowski
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Paper Abstract

Axial strain can be determined by monitoring the modal pattern variation of an optical fiber. The results of a numerical model developed to calculate the modal pattern variation at the end of a weakly guiding optical fiber under axial strain is presented. Whenever an optical fiber is under stress, the optical path length, the index of refraction, and the propagation constants of each fiber mode change. In consequence, the modal phase term βinz of the fields and the fiber output pattern are also modified. For multimode fibers, very complicated patterns result. The predicted patterns are presented and an expression for the phase variation with strain is derived

Paper Details

Date Published: 1 June 1992
PDF: 8 pages
Opt. Eng. 31(6) doi: 10.1117/12.56175
Published in: Optical Engineering Volume 31, Issue 6
Show Author Affiliations
Robert S. Rogowski, NASA (United States)

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