UmiX series: How to miniaturize FOG technology

Ferrand, Sebastien; Rattier, M.; Molucon, C.; Gautier, Kevin; Cheiney, Pierrick; Peter, Emmanuelle; Mancini, Marco

doi:10.1109/inertial53425.2022.9787535

Cited by 7 publications

(3 citation statements)

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“…In addition, in RFOGs, the reduction of the diameter of the fiber ring resonator is probably critical because it has a direct negative impact on the finesse and Q-factor of the cavity, with a consequent degradation of the performance. Navigation-grade interferometric FOGs with a coil diameter of 40 mm are already on the market [109], while demonstrating a navigationgrade RFOG based on a fiber ring resonator with the same diameter seems challenging. Additional details on the RFOG technology, having a TRL equal to 4-5, are available in [110].…”

Section: B Resonant Photonic Gyroscopesmentioning

confidence: 99%

Miniaturization of Interferometric Optical Gyroscopes: A Review

Dell’Olio,

Natale,

Wang

et al. 2023

IEEE Sensors J.

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Gyroscopes are inertial sensors whose field of application is rapidly expanding. The growing interest in autonomous systems, CubeSats as well as their constellations, and unmanned vehicles is stimulating a strong interest in miniaturized gyroscopes for integration in inertial units with a volume smaller than 100 cm 3 . Some of these applications require gyroscopes that are highly immune to disturbances, especially vibrations, mechanical shocks, and radiation. In these application contexts, the use of microelectromechanical gyroscopes is often avoided in favor of sensors without moving parts, such as optical gyroscopes based on the Sagnac effect. The technology of interferometric optical gyroscopes is currently considered to be potentially capable of enabling the development of highly innovative angular velocity sensors, which are simultaneously inertial grade and miniaturized. This paper critically examines the scientific and R&D activity aimed at miniaturization of interferometric optical gyroscopes, focusing on recent results, perspectives, and physical limitations. Interferometric optical gyroscopes with dimensions similar to those of microelectromechanical gyroscopes and better performance than the latter in terms of immunity to disturbances have not yet been demonstrated, but this paper shows how this goal could be realistically achieved in the medium term through the use of integrated microphotonics. This paper compares the technology being analyzed with the competitive technologies, highlighting their strengths and limitations.

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Section: B Resonant Photonic Gyroscopesmentioning

confidence: 99%

Miniaturization of Interferometric Optical Gyroscopes: A Review

Dell’Olio,

Natale,

Wang

et al. 2023

IEEE Sensors J.

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“…1 + e iθ e iφ 1 sin ωt+iφ 3 sin 3ωt . (7) We can now introduce the two-dimensional generalized Bessel function (GBF) [26,27], with a Jacobi-Anger expansion given by:…”

Section: Theory Of Multi-harmonic Modulationmentioning

confidence: 99%

“…Reducing phase noise is especially important in applications regarding inertial navigation because the precision can be improved without increasing the size of the coil [4,7]. In an FOG interrogated by incoherent light, four types of noise dominate [8]: relative-intensity noise (RIN) [9][10][11][12], thermal-phase noise (TPN) [13][14][15], shot noise (SN), and detection noise (DN).…”

Section: Introductionmentioning

confidence: 99%

Multi-Harmonic Modulation in a Fiber-Optic Gyroscope

Miranda

Takei

Miyazawa

et al. 2023

Sensors

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Optimizing the bias modulation of a fiber-optic gyroscope is crucial to improving its precision. In this study, we propose and demonstrate the use of multiple harmonics of sinusoidal modulation as an intermediate alternative to the widely used modulation methods: sinusoidal and square-wave modulation. We show that this alternative integrates the advantages of each modulation method by providing a smooth modulation that produces a clean, spike-free output and a satisfactory signal-to-noise ratio. By using three harmonics of modulation in combination with a high frequency to reduce thermal phase noise, we obtained an angular random walk of 5.2(2)μdeg/h and a bias instability of ∼10μdeg/h. This is the highest performance ever reported for fiber-optic gyroscopes.

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Advanced Interferometric Fiber Optic Gyroscope for Inertial Sensing: A Review

Song

Zhang

et al. 2023

J. Lightwave Technol.

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UmiX series: How to miniaturize FOG technology

Cited by 7 publications

References 0 publications

Miniaturization of Interferometric Optical Gyroscopes: A Review

Miniaturization of Interferometric Optical Gyroscopes: A Review

Multi-Harmonic Modulation in a Fiber-Optic Gyroscope

Advanced Interferometric Fiber Optic Gyroscope for Inertial Sensing: A Review

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