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26 April 2008 Enhanced resolution of a POF-based refractometer using a novel hybrid silica-fiber POF directional coupler
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Abstract
For a plastic optical fiber based refractometer system the influence of the directivity of the fiber coupler on the achievable resolution is analysed. It is also shown that provided the fiber length between the sensing tip and receiver is less that 2 m that interference due to Rayleigh backscatter will not comprise operation of the refractometer. A novel coupler based on a hybrid silica fiber-plastic fiber design is used experimentally to provide a comparison to the modelled results. It is shown that the high directivity (>35 dB) of this coupler can significantly enhance the resolution of the refractometer.
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Gerald Farrell and Cheng Gao "Enhanced resolution of a POF-based refractometer using a novel hybrid silica-fiber POF directional coupler", Proc. SPIE 7003, Optical Sensors 2008, 70030D (26 April 2008); https://doi.org/10.1117/12.781256
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