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Proceedings Paper

Phase shift of TE and TM modes in an optical fiber due to axial strain (exact solution)
Author(s): Claudio Oliveira Egalon; Robert S. Rogowski
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Paper Abstract

Axial strain may be determined by monitoring the phase shift of modes of a variety of optical fiber sensors. In this paper, the exact solution of a circular optical fiber is used to calculate the phase shift of the TE and TM modes. Whenever an optical fiber is stressed, the optical path length, the index of refraction, and the propagation constants of each fiber mode change. In consequence, the modal phase term, beta(ln)z, of the fields is shifted by an amount Delta phi. In certain cases, it is desirable to control the phase shift term in order to make the fiber either more or less sensitive to certain kinds of strain. It is shown that it can be accomplished by choosing appropriate fiber parameters.

Paper Details

Date Published: 26 June 1992
PDF: 12 pages
Proc. SPIE 1634, Laser Diode Technology and Applications IV, (26 June 1992); doi: 10.1117/12.59179
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. 1634:
Laser Diode Technology and Applications IV
Daniel S. Renner, Editor(s)

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