First steps for a Giant FOG: Searching for the limits

Toldi, Elliot de; Lefèvre, Hervé; Guattari, Frédéric; Bigueur, Alexandre; Steib, Adrien; Ponceau, Damien; Molucon, C.; Ducloux, Eric; Wassermann, Joachim; Schreiber, Ulrich

doi:10.1109/inertialsensors.2017.8171491

Cited by 10 publications

(8 citation statements)

References 6 publications

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“…Better short-term sensitivity not only improves the performance of INSs but also expands the application of FOGs to other areas, such as seismology [8], [9]. One way to improve the short-term sensitivity is to increase the scaling factor by using a larger fiber coil [10], [11]. However, optical power is attenuated in such a long fiber, and thereby the effect of shot noise could degrade the sensitivity [12].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Suppression of Thermal Phase Noise and Relative Intensity Noise in a Fiber-Optic Gyroscope

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Simultaneous Suppression of Thermal Phase Noise and Relative Intensity Noise in a Fiber-Optic Gyroscope

et al. 2023

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“…Reducing phase noise is especially important in applications regarding inertial navigation because the precision can be improved without increasing the size of the coil [2]. In an FOG interrogated by incoherent light, four types of noise dominate [5]: relative-intensity noise (RIN) [6][7][8][9], thermal-phase noise (TPN) [10][11][12], shot noise (SN), and detection noise (DN).…”

Section: Introductionmentioning

confidence: 99%

Multi-harmonic modulation in a fiber-optic gyroscope

Miranda¹,

Kozuma²

2023

Preprint

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<p>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 ∼10 μdeg/h.</p>

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“…For demanding applications, including inertial navigation and geophysics, improving the precision of an FOG is crucial. The precision of an FOG can be improved by either increasing its scale factor, which is proportional to the coil diameter and length, or reducing its amount of phase noise [2]. Giant FOGs with large coil diameters of over a meter are promising for studying geophysical phenomena [2], [3].…”

Section: Introductionmentioning

confidence: 99%

“…The precision of an FOG can be improved by either increasing its scale factor, which is proportional to the coil diameter and length, or reducing its amount of phase noise [2]. Giant FOGs with large coil diameters of over a meter are promising for studying geophysical phenomena [2], [3]. Using longer fibers is also possible at the expense of increased shot noise contributions due to optical attenuation.…”

Section: Introductionmentioning

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 [2]. In an FOG interrogated by incoherent light, four types of noise dominate [5]: relative-intensity noise (RIN) [6]- [9], thermal-phase noise (TPN) [10]- [12], shot noise (SN), and detection noise (DN).…”

Section: Introductionmentioning

confidence: 99%

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