Simulation of De-Cladding Fiber Optic Sensor Using MODE Solutions for Ammonia Detection

This study aims to determine (1) the value of light wavelengths yielding significant power losses which cause potential fiber optic to be used as a sensor, (2) the optimal value of the cladding refractive index for fiber optic based sensor application (3) loss power of fiber optic based sensor as a function of ammonia concentration. The method used is a simulation method using software Lumerical MODE Solutions. The parameters used in the simulation include the values of source wavelength, diameter and length of cladding and the values of ammonia solution concentration from 0 to 30 %. The results of simulation are (1) the source light wavelength of 1550 nm causes significant power losses that can yield the potential fiber optic to be used as a sensor, (2) the optimal value of the cladding refractive index for sensor applications is when the price approaches the value of core refractive index and (3) the increase in ammonia concentration cause slightly increase in power loss. It can be concluded that the wavelength of 1550 nm has more significant power losses than that of 1310 nm therefore it more sensitive to the change of ammonia concentration.