Abstract
To drive higher performance and smaller sized fiber optic gyroscope (FOG) coils smaller diameter optical fibers are required to allow more fiber to be used within these coils and/or to reduce the coil diameter. The reduction in fiber size and increase in FOG coil layers reduces the polarization extinction ratio (PER) capabilities of the optical fiber. To address this a new FOG polarization maintaining (PM) fiber has been developed with a lower stress coating package which offers enhanced microbend isolation and improved Bow Tie shapes for optimized glass performance resulting in a boost of 5dB or more in the PER performance of small diameter coils designed for size constrained IMUs with drift performance over environmental conditions of <<1.0 deg/hr with significantly larger than 300 meters of fiber length.
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