RF amplitude and phase control of coherent light by electrodes of travelling waves

This research discusses the influence of the parameters of the traveling wave electrodes on the efficiency of RF control. It was demonstrated that for more efficient collinear interaction, it is necessary to use electrodes of a travelling wave with a refractive index close to the refractive index of the optical waveguide. Moreover, when refractive indices coincide, bandwidth width is limited mainly by the attenuation of the signal in the electrodes.