Touching the limit of FOG angular random walk: Challenges and applications

Guattari, Frédéric; Molucon, C.; Bigueur, Alexandre; Ducloux, Eric; Toldi, Elliot de; Honthaas, Joachin; Lefèvre, Hervé

doi:10.1109/inertialsensors.2016.7745662

Cited by 24 publications

(12 citation statements)

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“…Since the two-port outputs the rotation signals simultaneously, we would investigate the possibility of utilizing them together for better noise suppression. The short-term noise of IFOGs mainly consists of three sources [16]- [18]…”

Section: Correlation Of the Two-port Signalsmentioning

confidence: 99%

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Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope

Yu-lin

Chen

et al. 2019

IEEE Photonics J.

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Since the polarization non-reciprocity errors are canceled out through optical compensation in dual-polarization interferometric fiber-optic gyroscopes (IFOGs), two ports, namely, the reciprocal and nonreciprocal ports, are both feasible sensing output. In this work, we propose and demonstrate a weighted subtraction method for noise suppression that utilizes the partial correlated two-port signals simultaneously. The relative intensity noise has reduced to 56.2% of its original value in the experiment and agrees with the theoretical analysis; as a result, the angle random walk is suppressed from 5.7 × 10 −2 to 3.2 × 10 −2• / √ h with a 2-km-long fiber. The improvement on short-and long-term stability performance has been experimentally verified, which makes dual-polarization IFOG configuration promising for many applications.

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Section: Correlation Of the Two-port Signalsmentioning

confidence: 99%

“…is the bandwidth of the light source [16]. In typical IFOGs, the RIN is one or two orders of magnitude higher than the other two noises [18], therefore, it is the dominate noise in short-term time scale. In physics, the phase fluctuation of broadband light source generate random beatings, i.e.…”

Section: Correlation Of the Two-port Signalsmentioning

confidence: 99%

Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope

Yu-lin

Chen

et al. 2019

IEEE Photonics J.

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“…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]. In addition, thermal phase noise becomes nonnegligible for long fibers [11], [13]- [15].…”

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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“…Using longer fibers is also possible at the expense of increased shot noise contributions due to optical attenuation. While considering the effects of shot noise, the optimal coil length is a few kilometers [4].…”

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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Touching the limit of FOG angular random walk: Challenges and applications

Cited by 24 publications

References 1 publication

Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope

Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope

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

Multi-harmonic modulation in a fiber-optic gyroscope

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