Lithium Niobate Serrodyne Frequency Translator for Fiber-Optic Gyroscopes

Progress in developing serrodyne frequency shifters for fiber gyroscopes is reviewed. The objective of this work has been to maximize sideband suppression and minimize the effects of small variations in input polarization on device performance. The LiNb03 device described here utilizes a specialized sawtooth drive circuit and single-polarization wave-guides to achieve 41-dB sideband suppression.