Patent ID: 6240226
Filing Date: 2001-05-29
Classification: G02F

Abstract:
An optical circuit, comprising:a substrate;a first waveguide core disposed upon the substrate and surrounded by a first cladding on all sides not in contact with the substrate, having a phase of laser radiation propagating through the first waveguide core;a second waveguide core disposed upon the substrate and surrounded by a second cladding on all sides not in contact with the substrate;a first directional coupler optically coupling the first waveguide core and the second waveguide core at a first junction;a second directional coupler optically coupling the first waveguide core and the second waveguide core at a second junction; anda section of a thermo-optic polymer cladding material included in the first cladding, the therno-optic polymer cladding material covering an identifiable area of the first waveguide core between the first and second junction, the thermo-optic polymer cladding material having an index of refraction which varies with temperature, thereby changing the phase of laser radiation propagating through the first waveguide core.