Laser frequency noise induced error in resonant fiber optic gyro due to an intermodulation effect

Ma, Huilian; Yan, Yuchao; Wang, Linglan; Xu, Chang; Jin, Zhonghe

doi:10.1364/oe.23.025474

Cited by 14 publications

(2 citation statements)

References 22 publications

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“…Backscattering noise, polarization noise, and optical Kerr noise are considered to be the three most influential optical noise sources 7 – 9 Backscattering noise, in particular, is regarded as the most critical factor limiting gyroscope performance 10 , 11 . Backscattering noise in RFOGs manifests in two forms: noise caused by interference between backscattered light and signal light and noise arising from backscattered light itself, leading to output offsets.…”

Section: Introductionmentioning

confidence: 99%

Resonant fiber optic gyroscope based on sideband locking of dual-light sources

Tao,

Liu,

Nan

et al. 2024

Opt. Eng.

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Backscatter noise is a key limiting factor in the performance of resonant fiber optic gyroscopes. To enhance the accuracy of resonant fiber optic gyroscopes, a gyroscope system based on sideband locking technology is proposed. In this scheme, two tunable semiconductor lasers independently provide the clockwise and counterclockwise optical paths. An optical phase-locked loop is employed to achieve independent subharmonic phase locking of the two output lights, with their optical frequency difference equaling one free spectral range (FSR). By applying sinusoidal modulation at different frequencies to generate sidebands, the sideband locking technique is used to lock the first-order sidebands of the two lights to adjacent resonant frequencies. Through the filtering effect of the fiber ring resonator, the carrier intensity of the transmitted light and other sidebands are effectively suppressed. With this signal processing technique, the influence of two types of backscatter noise is completely eliminated, and the additional suppression of laser frequency noise is achieved. Experimental results show that, based on the Allan deviation, the bias instability of the gyroscope output is 1.42°/h. This method significantly improves the detection accuracy of the resonant fiber optic gyroscope under the same parameter precision or device performance requirements.

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Section: Introductionmentioning

confidence: 99%

Resonant fiber optic gyroscope based on sideband locking of dual-light sources

Tao,

Liu,

Nan

et al. 2024

Opt. Eng.

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“…The shot-noise of the photodetector determines the ultimate sensitivity of the RIOG. However, many characteristics, including backscattering [10][11][12][13][14][15][16][17][18][19][20][21][22], back-reflection [23][24][25][26][27][28], nonlinear Kerr effect [29][30][31][32][33][34][35][36][37], polarization fluctuation [38][39][40][41][42][43][44][45][46][47][48][49][50], and laser frequency noise [51][52][53], have negative impacts. These negative impacts degrade the performance of RIOGs and make it worse than the shot-noise limited theoretical sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Suppression Method of Optical Noises in Resonator-Integrated Optic Gyroscopes

Kuai

Wei

Yang

et al. 2022

Sensors

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Resonator-integrated optical gyroscopes have advantages such as all-solid-state, on-chip integration, miniaturized structure, and high precision. However, many factors deteriorate the performance and push it far from the shot-noise limited theoretical sensitivity. This paper reviews the mechanisms of various noises and their corresponding suppression methods in resonator-integrated optical gyroscopes, including the backscattering, the back-reflection, the polarization error, the Kerr effect, and the laser frequency noise. Several main noise suppression methods are comprehensively expounded through inductive comparison and reasonable collation. The new noise suppression technology and digital signal processing system are also addressed.

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Laser frequency noise measurement in a resonant fiber optic gyro

Zhang

et al. 2018

Optik

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Laser frequency noise induced error in resonant fiber optic gyro due to an intermodulation effect

Cited by 14 publications

References 22 publications

Resonant fiber optic gyroscope based on sideband locking of dual-light sources

Resonant fiber optic gyroscope based on sideband locking of dual-light sources

Suppression Method of Optical Noises in Resonator-Integrated Optic Gyroscopes

Laser frequency noise measurement in a resonant fiber optic gyro

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