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We present a near-navigation-grade interferometric fiber optic gyroscope (IFOG) based on an integrated optical chip. The chip comprises a light source, a photodiode, and a 3 dB coupler within an area of 48 mm2. By interrogating with an integrated optical modulator and a small-diameter sensing coil, the IFOG is realized. This allows for a significant reduction in size, weight, power consumption, and cost. Preliminary performance data of a gyro prototype exhibits 0.018 deg/h bias instability.
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Shang et al. (2020) studied this question.
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