Drift suppression in a dual-polarization fiber optic gyroscope caused by the Faraday effect

Liu, Pan; Li, Xuyou; Guang, Xingxing; Xu, Zhenlong; Ling, Weiwei; Yang, Huajun

doi:10.1016/j.optcom.2017.03.030

Cited by 26 publications

(10 citation statements)

References 24 publications

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“…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: 83%

“…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%

“…As mentioned, the Faraday effect-induced bias error can be compensated optically at room temperature [ 24 ]. The optical compensation configuration is referred to the ‘dual-polarization IFOG’, in which two orthogonal polarizations propagate simultaneously in the PM fiber.…”

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: Discussionmentioning

confidence: 83%

Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Liu²,

Guang³

et al. 2017

Sensors

Self Cite

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“…Although the PN errors inevitably accompany with both polarizations, they have opposite signs thus can cancel out, or say compensated, optically or electronically. A series of investigation shows that the dual-polarization IFOGs have various benefits in the temperature [8], [9] and magnetic field [10] stability, as well as cost-effectiveness [11]. In dual-polarization configuration, one interesting and important fact is that the compensation of PN errors is valid for both reciprocal and non-reciprocal ports [4], [5], [11], [12].…”

Section: Introductionmentioning

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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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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Design of high shielding effectiveness magnetic shield for fiber optic gyroscope

et al. 2019

Optik

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Drift suppression in a dual-polarization fiber optic gyroscope caused by the Faraday effect

Cited by 26 publications

References 24 publications

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

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

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

Design of high shielding effectiveness magnetic shield for fiber optic gyroscope

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