No abstract

In this work, a single fiber optic fiber was developed as a water pollution sensor based on the Surface Plasmon Resonance Phenomenon based upon the Mach - Zehender Interferometry (MZI) technology. The sensor submitted was developed to detect water pollutants. The SPR sensors were prepared by coating a golden metallic film which thickness 42 nm on a chemically etched single-mode fiber with a thickness of 20 micrometers, which achieved the best results of sensitivity to water pollution, the results of the high sensitivity of the optical fiber sensor were obtained based on the surface plasmon resonance phenomenon. The experimental results showed high sensitivity, reaching 1315 pm/mol.l−1 for a salty solution with distilled water, 1705 pm/mol.l−1 for the salty solution with tap water, as well as 2222 pm/mol.l−1 for sugar solution with distilled water, and 1925 pm/mol.l−1 for sugar solution with tap water. This means that these sensors which are based on SPR could be very useful in the field of water pollution detection.

In this work, based on Mach- Zehender Interferometry (MZI) technique, a single-mode optical fiber had been designed as a water pollution sensor. The submitted sensor had been designed to detect pollutants in water. The sodium chloride salt and sugar were used as simulation examples of pollutants with different concentrations (0-0.45) mol /liter. The performance of the submitted sensor had been studied for different sensor arm diameters which were (63.5, 51.58, 39.68 and 20 µm). The variation of the refractive index of salty and sugary solutions surrounding the sensor leads to a change in the optical properties of the transmitted signal. In this work, a wavelength shifting had been obtained due to this variation. The influence of sensor diameter on the sensitivity of the system had been studied. From the results, we found that the higher sensitivity was for the sensors with a diameter of 20 µm, and they were 1130 pm/mol.l-1 and 1205 pm/mol.l-1 for salty and sugary solution respectively.