Phase-locked dual-loop optical fiber gyroscope
Year: 2025
Authors: D’Apice F., Zahoor R., Capezzuto M., D’Ambrosio D., De Natale P., Gagliardi G., Amato LS., Avino S.
Autors Affiliation: Ist Nazl Ottica INO, Consiglio Nazl Ric, Via Campi Flegrei,34 Comprensorio Olivetti, I-80078 Pozzuoli, Italy; Ist Nazl Ottica INO, Consiglio Nazl Ric, Largo E Fermi 6, I-50125 Florence, Italy; Centro Geodesia Spaziale Giuseppe Colombo, Agenzia Spaziale Italiana, Localita Terlecchia, I-75100 Matera, Italy.
Abstract: Fiber-optic gyroscopes (FOGs) are widespread sensors used in different fields, such as inertial sensing, navigation, positioning systems, and seismology. In particular, for applications where high bandwidth and dynamic range are necessary, such as rotational seismology, FOGs are used in closed-loop configuration. Here, we show a novel closed-loop FOG based on a dual feedback configuration. Optical phase is controlled by serrodyne modulation via an electro-optic modulator, while electronic phase is stabilized via a digital phase-locked loop (PLL) system. System performance demonstrates that this approach enables both wide dynamic ranges, gaining up to four orders of magnitude at low frequency, and a high bandwidth. (c) 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
Journal/Review: OPTICS LETTERS
Volume: 50 (16) Pages from: 5133 to: 5136
More Information: Agenzia Spaziale Italiana (2023-1-HH.0); NextGenerationEU.KeyWords: Bandwidth; Data mining; Fiber optic sensors; Inertial navigation systems; Light modulators; Locks (fasteners); Optical fibers; Optical signal processing; Phase locked loopsDOI: 10.1364/OL.568169
