Phase transformation of electromagnetic field in regular waveguide

The transformation of electromagnetic field is performed by series of phase correctors placed inside of waveguide. The field in waveguide is presented as linear combination of respective eigenfunctions with unknown coefficients. The optimization problem is considered in variational statement and consists in maximization of power functional. The solution is sought for an iterative process improves the functional value in each step. The generalization on the case more than two correctors is made. Computational results are demonstrated.