Optimization of the Angular Random Walk in Laser-Driven Fiber-Optic Gyroscopes

Morris, Therice A.; Zawada, Adele N.; Garcia, Devin G; Wheeler, Jonathan M.; Digonnet, Michel J. F.

doi:10.1109/jsen.2021.3136087

“…Another method is to suppress the noises that impose a limitation on the short-term sensitivity [16]. Four types of noise limit the sensitivity of a several-kilometers long FOG: thermal phase noise (TPN), relative intensity noise (RIN), shot noise, and detection noise.…”

Section: Introductionmentioning

confidence: 99%

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

Takei

¹

,

Miranda

²

,

Miyazawa

³

et al. 2023

View full text Add to dashboard Cite

“…Sinusoidal modulation is popular in open-loopbased FOG since it can be easily achieved with commercial lock-in amplifiers. On the other hand, in terms of maximizing the ratio between the sensitivity and RIN, SWM is preferred [22]. This is because the signal is proportional to sin(ϕ), where ϕ is the modulation amplitude, while RIN is proportional to 1 + cos(ϕ).…”

Section: Introductionmentioning

confidence: 99%

Multi-harmonic modulation in a fiber-optic gyroscope

Miranda¹,

Kozuma²

2023

Preprint

0

View full text Add to dashboard Cite

<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>

show abstract

“…To properly identify the rotation direction, an FOG utilizes dynamic biasing phase modulation. Optimization of the bias modulation is essential for reducing the phase noise [22]. Two different types of modulation are used on FOGs: sinusoidal and square-wave modulation (SWM).…”

Section: Introductionmentioning

confidence: 99%

“…Sinusoidal modulation is popular in open-loop-based FOG since it can be easily achieved with commercial lock-in amplifiers. On the other hand, in terms of maximizing the ratio between the sensitivity and RIN, SWM is preferred [22]. This is because the signal is proportional to sin(ϕ), where ϕ is the modulation amplitude, while RIN is proportional to 1 + cos(ϕ).…”

Section: Introductionmentioning

confidence: 99%

Multi-harmonic modulation in a fiber-optic gyroscope

Miranda¹,

Kozuma²

2023

Preprint

0

View full text Add to dashboard Cite

<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>

show abstract

Optimization of the Angular Random Walk in Laser-Driven Fiber-Optic Gyroscopes

Cited by 10 publications

References 14 publications

Simultaneous Suppression of Thermal Phase Noise and Relative Intensity Noise in a 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

Multi-harmonic modulation in a fiber-optic gyroscope

Contact Info

Product

Resources

About