Bias Error Caused by the Faraday Effect in Fiber Optical Gyroscope With Double Sensitivity

Liu, Pan; Li, Xuyou; Guang, Xingxing; Li, Guangchun; Guan, Lei

doi:10.1109/lpt.2017.2723007

Cited by 12 publications

(9 citation statements)

References 13 publications

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“…This may be because the birefringence of fiber coil with skeleton is more sensitive to temperature variation. In addition, in our previous study [ 25 ], we have verified that the Faraday effect-induced bias error is suppressed in IFOG with double sensitivity in room temperature, which is also different from the focus of this paper.…”

Section: Discussioncontrasting

confidence: 75%

“…Actually, the birefringence of the fiber changes along with fiber length due to the twist even at room temperature. In our previous work [ 24 , 25 ], the performance of the optical compensation for fiber coil with different twist is verified, which indicates the optical compensation allows spatial dependence of birefringence to some extent.…”

Section: Discussionmentioning

confidence: 85%

“…There are two reasons: observing the Faraday effect-induced bias errors of two polarizations simultaneously, and confirming the performance of optical compensation. However, the optical compensation configuration can be simplified, which has been demonstrated in [ 25 , 32 ].…”

Section: Discussionmentioning

confidence: 99%

“…After the PM fiber coil is fabricated, the twist is a constant parameter. Consequently, when the temperature and radial magnetic field remain steady, the Faraday effect-induced bias errors of x and y polarizations are fixed and they have opposite polarities [ 24 , 25 ].…”

Section: Theorymentioning

confidence: 99%

“…When the compensation coils are positioned properly with respect to the inherent sensing coil of IFOG, the magnetic sensitivity of IFOG can be eliminated. The fourth method is the optical compensation approach [ 24 , 25 ]. The Faraday effect-induced bias errors of two polarizations in PM fiber possess opposite polarities, thus they can be canceled out optically when both polarizations are utilized simultaneously.…”

Section: Introductionmentioning

confidence: 99%

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Temperature Dependence of Faraday Effect-Induced Bias Error in a Fiber Optic Gyroscope

Liu²,

Guang³

et al. 2017

Sensors

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Improving the performance of interferometric fiber optic gyroscope (IFOG) in harsh environments, such as magnetic field and temperature field variation, is necessary for its practical applications. This paper presents an investigation of Faraday effect-induced bias error of IFOG under varying temperature. Jones matrix method is utilized to formulize the temperature dependence of Faraday effect-induced bias error. Theoretical results show that the Faraday effect-induced bias error changes with the temperature in the non-skeleton polarization maintaining (PM) fiber coil. This phenomenon is caused by the temperature dependence of linear birefringence and Verdet constant of PM fiber. Particularly, Faraday effect-induced bias errors of two polarizations always have opposite signs that can be compensated optically regardless of the changes of the temperature. Two experiments with a 1000 m non-skeleton PM fiber coil are performed, and the experimental results support these theoretical predictions. This study is promising for improving the bias stability of IFOG.

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Section: Discussioncontrasting

confidence: 75%

Section: Discussionmentioning

confidence: 85%