Monte Carlo Simulation of Optical Light Transport in an Absorption-Based Tapered Fiber Sensor

Monte Carlo simulation of an optical light propagation in a developed tapered multimode fiber sensor for the detection of salinity solution is demonstrated. The effect of the changes of the length of the sodium chloride in the tapered fiber region as a function of the concentration/absorption coefficient on the absorbance response are observed. Results showed the linear relationship of the absorbance with the length of the sensing solution as well as with the absorption coefficient. The sensitivity of the system is calculated to be less than 0.0058 a.U/mm. The findings exhibited the potential of the Monte Carlo simulation as a platform for a preliminary study of tapered fiber sensor applications.