Patent ID: 6993216

Claim:
A method of switching light, comprising: introducing control light of an intensity into a region of a first 1D output waveguide in a planar waveguide to vary a transmissivity of a channel of the first 1D output waveguide; introducing control light of an intensity into a region of a second 1D output waveguide in the planar waveguide to vary a transmissivity of a channel of the second 1D output waveguide, the regions having spectral transmissivities responsive to the light intensities therein; and transmitting input light into an input 1D waveguide in the planar waveguide, a channel of the input 1D waveguide having a first end opening to ends of the first and second 1D output waveguides; and wherein the regions form resonant optical cavities in preselected frequency bands.