The noise suppression in resonant micro optic gyroscopes based on dual light sources method

Niu, Jian; Liu, Wenyao; Pan, Ziwen; Tao, Yu; Zhou, Yanru; Xing, Enbo; Tang, Jun; Li, Jun

doi:10.1016/j.optcom.2021.126839

Cited by 10 publications

(7 citation statements)

References 26 publications

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“…However, using different modulation frequencies to modulate CW and CCW means using different modulators, which will inevitably lead to different edges of CW and CCW paths, because these defects lead to the error of resonance center, and then convert it into Kerr noise. To suppress the interference part of backscattering noise, a design scheme of applying double-phase modulation 8,23,24 to phase modulator is proposed. As shown in Fig.…”

Section: Principle and Analysismentioning

confidence: 99%

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Resonant micro-optical gyroscope combination closed-loop noise suppression

Liu

Zhao

et al. 2023

Opt. Eng.

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.In the development of miniaturized optical gyroscopes, the resonant micro-optical gyroscope (RMOG) is the most representative sensor of new optical gyroscopes. However, in the manufacturing process of optical elements, the influence of backscattering and optical Kerr noise limits the performance of RMOG. A method of suppressing optical Kerr noise generated by the front end by compensating the optical power difference while suppressing the backscattering noise is introduced. In this method, we study the optimal strategy of double-phase modulation frequency to obtain the maximum spectral gap of clockwise and counterclockwise light, so as to suppress the error related to backscattered light. At the same time, the influence of Kerr noise on the optical path is reduced through the high-precision feedback loop of the intensity modulator. Based on Allan variance, the long-term deviation stability of RMOG reaches 0.98 deg/h.

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Section: Principle and Analysismentioning

confidence: 99%

“…To suppress the interference part of backscattering noise, a design scheme of applying double-phase modulation 8 , 23 , 24 to phase modulator is proposed. As shown in Fig.…”

Section: Principle and Analysismentioning

confidence: 99%

Resonant micro-optical gyroscope combination closed-loop noise suppression

Liu

Zhao

et al. 2023

Opt. Eng.

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“…Configurations of optical resonator gyroscopes, in which the frequencies in the two channels of the gyroscope are tuned to the eigenfrequencies of the resonator by two tunable lasers, have also been developed [40][41][42]. In this case, phase modulators are used only to create the periodic modulation of radiation necessary to generate feedback signals.…”

Section: Application Of Phase-modulation Spectroscopy and Tunable Las...mentioning

confidence: 99%

“…Mostly, to minimize this error, an additional non-reciprocal frequency shift is created in the CW and CCW channels, for example, channels are tuned to different longitudinal resonator modes. Various types of phase modulation [4,5,20,22,34,32,44] or a number of lasers [40][41][42] can be used for this purpose. As a result, the CW and CCW waves have significantly different frequencies, which are spaced across the spectrum by several intermode intervals, and the beats that appear during interference with the backscattered wave can be excluded, for example, by a low-pass filter.…”

Section: The Main Sources Of Measurement Errorsmentioning

confidence: 99%

Directions of development of optical gyroscopes based on passive ring resonators

Filatov,

Shalymov,

Venediktova

et al. 2023

Advanced Sensor Systems and Applications XIII

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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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The noise suppression in resonant micro optic gyroscopes based on dual light sources method

Cited by 10 publications

References 26 publications

Resonant micro-optical gyroscope combination closed-loop noise suppression

Resonant micro-optical gyroscope combination closed-loop noise suppression

Directions of development of optical gyroscopes based on passive ring resonators

Suppression Method of Optical Noises in Resonator-Integrated Optic Gyroscopes

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