Patent ID: 8891916

Claim:
An SPPs tunable optical resonant ring filter, comprising: an SPPs straight waveguide, an SPPs tunable directional coupler, an SPPs tunable resonant ring, and a ring heater; wherein the resonant ring and the straight waveguide outside of the ring form the coupler; the coupler and resonant ring are made of polymer-metal-polymer SPPs waveguides; gaps between segments of a straight metal wire are disposed symmetrically on the straight SPPs waveguides and gaps between segments of a curved metal wire are disposed symmetrically on the resonant ring; the ring heater comprises two portions disposed symmetrically on an upper surface and a bottom surface of the resonant ring respectively; and further wherein a first electrode pin is connected to the straight metal wire of the SPPs straight waveguide, a second electrode pin is connected to the curved metal wire of the resonant ring, the metal wires of the polymer-metal-polymer SPPs waveguides are used simultaneously as waveguide and heating elements, and a third electrode pin and a fourth electrode pin are connected to the ring heater.