Application of Gaussian Function for Modeling Two-Frequency Radiation from Addressed FBG

Abstract

The article discusses a possibility of modeling responses of addressed fiber Bragg structures (AFBS) using the normal Gauss distribution function. The presented study is motivated by the fact that for the reliable operation of the microwave photonic measurement system, based on the use of address structures with two identical narrow-band bandwidth responses (2λ-FBG), it is necessary to ensure that a bandwidth of an inclined filter covers the operating range of the AFBS. Since this filter is necessary for estimating a shift of a central wavelength of the AFBS by determining a change in amplitudes of oscillations at a photodetector, which allows measurements of various physical fields without the use of expensive interrogators.