Patent ID: 8571363

Claim:
A ring resonator, comprising: a first optical waveguide arranged in a loop; a second optical waveguide tangentially connected to said first optical waveguide; and an electrical coil, in which the electrical coil is in electromagnetic communication with said first optical waveguide such that an electrical current flowing through the electrical coil induces a corresponding electrical current in the first optical waveguide, in which the resonant frequency of the first optical waveguide is selectively altered by altering the electrical current flowing through the electrical coil to create the corresponding electrical current in the first optical waveguide, the corresponding electrical current in the first optical waveguide altering the resistance of the first optical waveguide, the altered resistance of the first optical waveguide altering the operating temperature of the first optical waveguide, the altered operating temperature of the first waveguide altering the resonant frequency of the first optical waveguide.