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Proceedings Paper

Axial strain insensitivity of weakly guiding optical fibers
Author(s): Claudio Oliveira Egalon; Robert S. Rogowski
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Paper Abstract

A numerical model has been developed to calculate the modal phase shift of circular step index profile weakly guiding fibers under axial strain. Whenever an optical fiber is under stress, the optical path length, the index of refraction, and the propagation constants of each mode change. In consequence, the phase of each mode is also modified. A relationship for the modal phase shift is presented. This relation is applied to both single mode and two-mode fibers in order to determine the sensitivity characteristics of strained fibers. It was found that the phase shift is strongly dependent on the core refractive index, n(co). It was also found that it is possible to design fibers which are insensitive to axial strain. Practical applications of strain insensitive fibers are discussed.

Paper Details

Date Published: 26 March 1993
PDF: 6 pages
Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); doi: 10.1117/12.141333
Show Author Affiliations
Claudio Oliveira Egalon, NASA Langley Research Ctr. (United States)
Robert S. Rogowski, NASA Langley Research Ctr. (United States)


Published in SPIE Proceedings Vol. 1798:
Fiber Optic Smart Structures and Skins V
Richard O. Claus; Robert S. Rogowski, Editor(s)

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