Compensation of excess RIN in fiber-optic gyro

Aleĭnik, A. S.; Deineka, I. G.; Smolovik, Mikhail; Neforosnyi, S. T.; Rupasov, A. V.

doi:10.1134/s2075108716030020

Cited by 15 publications

(1 citation statement)

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“…It can be seen that the measured phase noise floor is close to the calculated equivalent phase noise of RIN, indicating that the main limited noise of the broadband source sensing system is RIN. If optical subtraction [6] or electronic subtraction [7] is used to suppress RIN, shot noise may be a more important noise limit for broadband source sensing systems. For the InGaAs PD, taking B=1 Hz, λ=1545 nm, η=0.8, and the initial phase varies between 0 and 2π.…”

Section: Experiments and Discussionmentioning

confidence: 99%

Equivalent phase noise analysis in broadband source sensing system using a 3×3 coupler

Li¹,

Huang

Zhang

2023

European Workshop on Optical Fibre Sensors (EWOFS 2023)

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The noise conversion relationships of relative intensity noise (RIN) and shot noise in a broadband source sensing system using a 3×3 coupler are studied. RIN and shot noise are converted into the phase noise floor through the arctangent demodulation scheme and the performances of the 3×3 coupler. To quantify the contribution of RIN and shot noise, we analyzed the equivalent phase noise induced by RIN and shot noise. The theory and experiment demonstrate that the equivalent phase noise of RIN is related to the correlation of three RINs and the initial phase, and the shot noise is related to the initial phase.

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Section: Experiments and Discussionmentioning

confidence: 99%

Equivalent phase noise analysis in broadband source sensing system using a 3×3 coupler

Li¹,

Huang

Zhang

2023

European Workshop on Optical Fibre Sensors (EWOFS 2023)

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Excess relative intensity noise suppression in depolarized interferometric fiber optic gyroscopes

Yu-lin

Ben

Luo

et al. 2019

Optics Communications

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Dual-polarization interferometric fiber optic gyroscope with Shupe effect compensation

Cao

Zhu

Shi

et al. 2023

Applied Physics Letters

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Dual-polarization (DP) interferometric fiber optic gyroscope (IFOG) has been studied for over a decade, which has important applications in inertial navigation and rotational seismology. Currently, the Shupe effect is an important factor degrading the accuracy of the DP IFOG. Here, a dual-quadrupolar winding pattern is proposed to compensate for the Shupe effect. The finite-element simulation experiments verify that the phase shifts induced by the Shupe effect in two polarizations are almost reversed and well compensated. Static laboratory test results show that, in this configuration, the angle random walk is reduced 10-fold to 7.1×10−5 °/h, while the bias instability is reduced ninefold to 1.7×10−4 °/h. Moreover, a 3-h temperature variation experiment is carried out. The results show that, compared with the original output, the net rotation rate errors originating from the Shupe effect are effectively compensated and the temperature drift is reduced by 13 times. To summarize, the dual-quadrupolar-wound method is a valid approach to compensate for the Shupe effect, and the temperature adaptability of this DP configuration is greatly enhanced.

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Compensation of excess RIN in fiber-optic gyro

Cited by 15 publications

References 1 publication

Equivalent phase noise analysis in broadband source sensing system using a 3×3 coupler

Equivalent phase noise analysis in broadband source sensing system using a 3×3 coupler

Excess relative intensity noise suppression in depolarized interferometric fiber optic gyroscopes

Dual-polarization interferometric fiber optic gyroscope with Shupe effect compensation

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