Exact solution for phase shift of TE and TM modes in an optical fiber due to axial strain

Claudio Oliveira Egalon; Robert S. Rogowski

doi:10.1117/12.138768

1 July 1993 Exact solution for phase shift of TE and TM modes in an optical fiber due to axial strain

Claudio Oliveira Egalon, Robert S. Rogowski

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Optical Engineering, Vol. 32, Issue 7, (July 1993). https://doi.org/10.1117/12.138768

Abstract

Axial strain on an optical fiber can be determined by monitoring the phase shift of a variety of optical fiber sensors. The exact analytical solutions for optical fields that propagate in a circular core optical fiber are used here to determine the phase shifts that occur for TE and TM modes due to axial strain. Whenever an optical fiber is stressed, the optical path length, the index of refraction, and the propagation constant of each fiber mode change. In consequence, the modal phase term βz of the fields is shifted by an amount ΔΦ. In certain cases, it is desirable to control the phase sensitivity to make fibers that are either more or less sensitive to strain. We show that it can be accomplished by choosing appropriate fiber parameters.

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Claudio Oliveira Egalon and Robert S. Rogowski "Exact solution for phase shift of TE and TM modes in an optical fiber due to axial strain," Optical Engineering 32(7), (1 July 1993). https://doi.org/10.1117/12.138768

Published: 1 July 1993

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