STITCHED WAVEGUIDE FOR USE IN A FIBER-OPTIC GYROSCOPE

Methods and systems for improved fiber optic gyroscopes for operation in non-atmospheric environments are provided. In one embodiment, an integrated optical circuit for an interferometer subject to non-atmospheric conditions comprises: a first section of waveguide within a Lithium crystalline structure that is exposed to an electrical field, the first section of waveguide being a Titanium-diffused waveguide region; a second section of waveguide within the Lithium crystalline structure that is not within the first section of the waveguide, the second section of waveguide being a proton-exchange waveguide region; a stitch coupling the first section of waveguide to the second section of waveguide; and a third section of waveguide configured to combine reciprocal light beams to produce an interference pattern, wherein at least one of the reciprocal light beams pass through the first section of waveguide and the second section of waveguide prior to producing the interference pattern.