Tapered Plastic Optical Fiber Coated With HEC/PVDF for Measurement of Relative Humidity

A simple humidity sensor is proposed and demonstrated using a tapered plastic optical fiber (POF) as a probe. Its operation is based on intensity modulation technique using a tapered POF probe coated with a polymer blend of hydroxyethylcellulose/polyvinylidenefluoride (HEC/PVDF) composite that acts...

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محفوظ في:
التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Batumalay, Malathy, Lokman, A., Ahmad, F., Arof, Hamzah, Ahmad, Harith, Harun, Sulaiman Wadi
التنسيق: مقال
منشور في: Institute of Electrical and Electronics Engineers (IEEE) 2013
الموضوعات:
الوصول للمادة أونلاين:http://eprints.um.edu.my/14388/
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6552979
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الوصف
الملخص:A simple humidity sensor is proposed and demonstrated using a tapered plastic optical fiber (POF) as a probe. Its operation is based on intensity modulation technique using a tapered POF probe coated with a polymer blend of hydroxyethylcellulose/polyvinylidenefluoride (HEC/PVDF) composite that acts as the humidity sensitive cladding. The sensor is fabricated using an etching method and has a waist diameter of 0.45 mm and tapering length of 10 mm. As the relative humidity varies from 50% to 85%, the output voltage of the sensor increases linearly from 0.32 to 1.25 mV. The HEC/PVDF composite-coated sensor exhibits a sensitivity of 0.023 mV/% with a slope linearity of . The sensitivity of HEC/PVDF composite-coated cladding toward humidity stems from its ability to swell as humidity increases in the atmosphere resulting in a drop in its refractive index below that of the core and thus allowing more light to be transmitted through the tapered fiber.