BiCore Fibre, a multipurpose evanescent mode-coupling-based device

Piet J. Severin

doi:10.1117/12.21997

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1 September 1990 BiCore Fibre, a multipurpose evanescent mode-coupling-based device

Piet J. Severin

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Proceedings Volume 1314, Fibre Optics '90; (1990) https://doi.org/10.1117/12.21997
Event: Fibre Optics '90, 1990, London, United Kingdom

Abstract

The Evanescent Mode Coupling phenomenon between two identical fibres has been studied in devices made with three different techniques. All show the coupling constant K to be linearly related to wavelength λ. This is explained in a simple model. In one of them, the BiCore Fibre (BCF), the effects of loading, temperature, bending and twisting are discussed. The BCF is intrinsically insensitive to temperature, bending is a most useful tuning mechanism and loading leads to polarization-dependent sensor effects. Through the wavelength dependence the BCE is shown to act as a distributed sensor. The BCF can be a polarization splitter for a particular length, but twisting allows any length to be used to that effect. In combination with other fibre-optic components the BCF can be used to advantage in all-fibre optical instruments. A reflection polarimeter is shown as an example.

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Piet J. Severin "BiCore Fibre, a multipurpose evanescent mode-coupling-based device", Proc. SPIE 1314, Fibre Optics '90, (1 September 1990); https://doi.org/10.1117/12.21997

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