D-Shaped Optical Fibre -based SPR Sensor for Environment Pollutants Detection

This manuscript presents a environment pollutants sensor using a D-shaped Optical Fibre (DOF). The Surface Plasmon Resonance (SPR) mechanism is applied for detecting the m-cresol, p-cresol, and o-cresol. In this, a DOF is decorated by a gold thin film over the flat surface to induce the SPR. The SPR phenomenon is implemented for analyzing the sensing performance in terms of resolution and sensitivity. The wavelength sensitivity is observed in terms of respective resonance wavelength (RW) shift for different cresols. The highest wavelength sensitivity of 5000 nm/RIU and a minimum resolution of 2 x 10
^-6
RIU is obtained for the sensor under consideration. Based on the promising results, this sensor can be very useful for environmental sensing applications.