Abstract
A novel approach of development of fiber optic sensor for measurement of refractive index of liquids is presented. This sensor uses two fibers, mirror as reflector and liquid as medium. The light is carried by the illuminating fiber up to modulation zone where the properties of incident light is modulated by modulator. The modulated light is carried by receiving fiber to the detector. The measurement principle is based on reflective intensity modulation. A novel sensing probe is designed with outer ring of fibers acting as illuminating fibers and center fiber acting as read fiber. Using this probe, effect of wavelength on refractive index is studied.
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