LAUSR

Refractive index is directly proportional to the concentration of medium. Based on this principle, we report two schemes of measuring varying concentration of solvent by measuring output response through intensity interrogation. In the first case, we use evanescent field by exposing certain portion of a cladding to varying concentration of fossil fuels. In the second case, we utilize reflectance through a displacement scheme for measuring the same analyte. Accordingly, all results are comprehensively analyzed and all sensing performances are procedurally investigated. The sensitivity of both the schemes are estimated and compared. The evanescent fiber optic set-up renders better response as compared to the displacement one. Due to simplicity in design approach, the all fiber optic schemes prove to be highly adaptable to sense other chemical contaminants.