Self-action of a wave field in one-dimensional system of weakly coupled active optical waveguides

The dynamics of self-action of a wave field in an array of weakly coupled active optical waveguides is studied analytically and numerically. It is shown that the introduction of weak gain in each of the waveguides allows significant reduction of radiation losses and efficient capture of all radiation in a single optical waveguide. The possibility of controlling the radiation localisation in the desired waveguide at the expense of varying the injection angle of the wave field into the considered system is demonstrated. The dependences of the characteristic parameters of the wave field are determined.