Optical switch based on it and the optical mode coupling device

摘要

And and containing the two waveguides that flank (92) coupling region (90, 94) is the effective refractive index of the coupling region waveguide structure smaller than the refractive index of the waveguide present invention, (10) is. There are (88, 96) border areas outside of the waveguide, the proximal end of the border area and the effective refractive index of the boundary regions of these decreases adiabatically towards the inside at the distal end. The periodic perturbation of the waveguide geometry, or a uniform reversible of the effective refractive index or by periodic perturbation, waveguides which are optically coupled. The optical switch matrix based on the waveguide structure, all waveguides are parallel and straight. A second aspect of the present invention is a directional coupler including a mechanism for causing a perturbation in the quasi-periodic reversible and the effective refractive index of the waveguide. Envelope function of each varies monotonically in the opposite sense. Light propagating in the direction of envelope function of the waveguide increases, the one waveguide is coupled into the other waveguide.