Explanation of polarisation dependence of differential phase shift in two-mode elliptic-core fibre strain gauges
- 3 August 1989
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 25 (16) , 1041-1042
- https://doi.org/10.1049/el:19890695
Abstract
An appropriate elliptic-core fibre theory is applied to model the differential phase shift between the first- and secondorder modes observed in recent experiments on two-mode elliptic-core fibres subjected to longitudinal strains. The theory provides an explanation of the polarisation dependence of the stretching δl2π required to produce a 2π differential phase shift between the two modes as a function of wavelength for both polarisations.Keywords
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