Multilayer waveguide optical gyroscope

An optical gyroscope comprising:

• a substrate;
• a multilayer waveguide rotation sensor disposed on the substrate and comprising a plurality of waveguides that overlie each other and are vertically separated, wherein at least one of the waveguides in the plurality of waveguides is a non-intersecting, spiraling coil;
• a light source disposed on the substrate and optically coupled to provide light to the multilayer waveguide rotation sensor through an X-waveguide coupler disposed on the substrate and through a modulator chip disposed in a cavity in the substrate wherein at least one of the plurality of waveguides is exposed through a sidewall of the cavity, the modulator chip comprising waveguides, the modulator chip positioned within the cavity in the substrate to horizontally and vertically align and optically couple the waveguides of the modulator chip with the least one of the plurality of waveguides exposed through the sidewall of the cavity;
• and
• a detector disposed on the substrate and optically coupled to receive light from the multilayer waveguide rotation sensor through the modulator chip and the X-waveguide coupler.

An optical gyroscope comprising:

• a waveguide rotation sensor disposed on a substrate, the waveguide rotation sensor comprising:
• a first waveguide that is a non-intersecting, spiraling coil, wherein a first end of the first waveguide at an outside diameter of the non-intersecting, spiraling coil is exposed through a sidewall in a cavity of the substrate;
• a first waveguide coupler disposed on the substrate and optically coupled to a second end of the first waveguide that is at an inside diameter of the non-intersecting, spiraling coil;
• and
• a phase modulator chip disposed in the cavity in the substrate, the phase modulator chip comprising waveguides, the phase modulator chip positioned within the cavity in the substrate to horizontally and vertically align and optically couple one of the waveguides of the phase modulator chip with the first end of the first waveguide through the sidewall of the cavity.