Based on approximation between Gauss function and spectral signal

Gauss function is utilized to simulate signal of optical fiber sensor array sensitive to ion

optical fiber tongue. Division of superposition spectral signal detected by optical fiber tongue and analysis of relative error are carried out by Matlab software. From result of simulation

it is known that superposition error of spectral caused by interference between ions in films sensitive to heavy metal ions can be reduced with corresponding algorithm. On this basis

superposition signals processing and simulation with optical noises in optical fiber tongue are carried out

provides theoretical foundation for preparation of practical optical fiber tongue and spectral signal processing.