The tunable optical filter interferometrically

摘要

Interferometric tunable optical filter, comprising:– a semiconductor substrate having a first electrode to the first surface;– a waveguide, which in the surface of the substrate and in the lateral direction is defined, in order to transmit light waves, wherein a portion of the waveguide in more than two parallel branches, is split, of which each branch has a different length; and a phase control means (14) for changing the effective index of the waveguide has;– a device for splitting the light waves in the branches of the waveguide; and– a device for recombining the light waves according to the split section of the waveguide.