Axial strain insensitivity of weakly guiding optical fibers

Claudio Oliveira Egalon; Robert S. Rogowski

doi:10.1117/12.141333

26 March 1993 Axial strain insensitivity of weakly guiding optical fibers

Claudio Oliveira Egalon, Robert S. Rogowski

Proceedings Volume 1798, Fiber Optic Smart Structures and Skins V; (1993) https://doi.org/10.1117/12.141333
Event: Fibers '92, 1992, Boston, MA, United States

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.

Citation Download Citation

Claudio Oliveira Egalon and Robert S. Rogowski "Axial strain insensitivity of weakly guiding optical fibers", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); https://doi.org/10.1117/12.141333

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