Interferometric fiber optic gyroscopes (IFOG) are used in applications that require very low noise, high scale factor stability, and high sensitivity, such as navigating airplanes, submarines, and spacecraft. However, the traditional closed-loop IFOG requires integrated optics components and high-frequency synchronous modulation and demodulation, which highly increases the cost and complexity of the IFOG. In this work, it is proposed the use of a passive IFOG configuration for uses in aerospace applications. The passive IFOG does not require modulation and its dynamic range is limited by the sample rate used to digitize the signal.
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Nunes et al. (2024) studied this question.
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