A miniaturized compact open-loop RFOG with demodulation signal compensation technique to suppress intensity modulation noise

Ying, Diqing; Mao, Jie; Li, Qiang; Jin, Zhonghe

doi:10.1016/j.optcom.2015.10.006

Cited by 17 publications

(3 citation statements)

References 28 publications

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“…Resonant fiber optic gyro (RFOG) based on the Sagnac effect has the advantages of high sensitivity and large dynamic range [ 2 ]. When compared with the traditional interferometric fiber optic gyro (IFOG), RFOG can achieve the same detection precision as IFOG with a much shorter fiber length, which gives evident superiority in the further integration, as well as improves its application value in the fields of navigation, aerospace, defense industries, and guidance systems [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, when the external environment, including temperature and stress changes, the laser’s center frequency and the resonant frequency of the fiber ring resonator (FRR) will also change. Therefore, directly measuring the resonance frequency difference of the CW and CCW light waves caused by the rotation using the RFOG system is extremely difficult; in addition, appropriate modulation and demodulation techniques are needed to improve the sensitivity of the signal detection system [ 9 ]. In a single closed-loop RFOG system, the triangular wave modulated signals with different frequencies are used to modulate the CW and CCW light waves.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Resonance Asymmetry Phenomenon in Resonant Fiber Optic Gyro

Sun

et al. 2018

Sensors

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This experiment demonstrated the resonance asymmetry phenomenon in the resonant fiber optic gyro. The asymmetry of resonant curve affects the system open-loop bias and its stability, which directly affects the accuracy of angular velocity measurement. In this paper, a new mathematic model is established. The influence of the coupler normal mode loss difference (the phase difference between the coupler cross port output optical field and direct port is less than the ideal π/2) on the symmetry of resonant curve, the resonant signal modulated by the triangular wave, and the demodulation curve are analyzed. Moreover, the asymmetry of the resonant curve leads to the asymmetry of the resonant signal, as modulated by the triangular wave and the demodulation curve from the theoretical simulation and the experiment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Resonance Asymmetry Phenomenon in Resonant Fiber Optic Gyro

Sun

et al. 2018

Sensors

View full text Add to dashboard Cite

show abstract

“…A resonant fiber optic gyro (RFOG) based on the Sagnac effect exhibits the advantages of high sensitivity and large dynamic range [ 2 ]. When compared with the traditional interferometric fiber optic gyro (IFOG), an RFOG is observed to achieve a similar detection precision but with a much shorter fiber length, providing superiority with respect to its further integration and augmenting its application value in the fields of navigation, aerospace, defense, and guidance systems [ 1 , 2 , 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Temperature Stability of a Hybrid Polarization-Maintaining Photonic Crystal Fiber Resonator and Its Application in a Resonant Fiber Optic Gyro

Zhang

et al. 2018

Sensors

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A fiber ring resonator (FRR) constructed using a Panda polarization-maintaining fiber does not effectively solve the problem of temperature-related polarization fluctuation, which considerably limits the detection accuracy of the resonant fiber optic gyro. The polarization-maintaining photonic crystal fiber (PM-PCF) can improve the thermal stability of the FRR. In this study, a structure that can simultaneously detect the polarization fluctuation of two FRRs is designed. We analyzed and verified the polarization phase shift errors of these two types of fibers, which are caused by the thermally induced birefringence changes. Theoretical simulation and experimental results confirm that a PM-PCF can be used to optimize the FRR, which can effectively suppress the polarization fluctuation.

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