The optical fiber taste sensor using the artificial biological film

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We have developed POF taste sensors because they have many advantages such as low-cost, easiness inhandling, immunity to electromagnetic interference and easines in adding new chemical functions. The proposed sensor is based on the POF structure changing from a leaky-POF to a guided-POF because of the changes in the refractive index caused by swelling ofthe cladding polymer for taste substances. In this study, to investigate the effect of the clad transparency condition, we fabricated POF humidity sensors, which have different transparent cladding. The results indicate that the sensitivity of the sensor was improved by using the dye-doped swelling polymer clad.