Ultra-low loss stitching for large-area waveguide based delay-line gyroscopes

We report on the design and fabrication of a large-area waveguide delay-line fabricated using four masks stitched together for gyroscope applications. Waveguide loss, including 100 stitches over 3 meters, is measured to be 0.78dB/m with crossing losses of 0.0156dB/crossing yielding predicted ARW of 31.3̊/hr/√Hz.