Interference fiber optic device for RoF antenna radiators control

Calculation of profiled optical element is described in the paper. This element is a part of fiber optic device intended to be used in Radio-over-Fiber systems. Calculation is based on Manakov equation system for forward and backward inter-group interference rays. Numerical integration of second order wave equation is used only for 50 microns element length. For 200 microns element length this calculation is diverged. 3D profile for element refractive index is obtained from calculations.