Dynamic Range Specific Temperature Dependent Uniform UShaped Glass Rodbased Opticalfiber Refractometer Operating At 660nm
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Abstract
Wide range of sensors are in use to determine the refractive index of various liquids across the world using electronic, mechanical, optical and magnetic mechanisms. In the present paper, a simple miniaturized optical fiber sensor based on a U-shaped glass rod as a sensing element to study the refractive index of various liquids either dark or transparent in the temperature range of 10oC to 60oC using a combination of binary liquids of Benzene and tert-Butanolhas been described. The sensor is designed by connecting the optical laser source of 660nm and an optical detector of benchmark make using two plastic-clad silica fibers of equal dimensions of 200/230μm creating a sensing zone by jointing U-shaped glass rod of specific dimensions at the middle of the two fibers. Immersing the glass rod into the binary mixture the light injected from the source is observed at the detector end and forming the relationship between the concentration of liquid mixtures at various temperatures and output power reaching the detector, a calibrated curve has been plotted, which can be used to determine the refractive index of liquids in the range of 1.36312nD to 1.51215nD.