Suppression of laser intensity fluctuation in resonator optical gyro by a simple light intensity feedback technique

Yin, Shihao; Liu, Wenyao; Xing, Enbo; Pan, Ziwen; Tao, Yu; Zhu, Jiangbo; Tang, Jun; Li, Jun

doi:10.1117/1.oe.59.3.036112

Cited by 10 publications

(8 citation statements)

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“…The square-wave intensity modulation is available for the meter-scale RFOG and not for the centimeter-scale RIOG due to the square-wave frequency being an integer multiple of the resonator's free spectral range [29]. A light intensity feedback loop technique was proposed by Yin et al to stabilize the light intensity input into the gyroscope system [34], as shown in Figure 11. The light intensity feedback loop consists of LIA2, PI2, and an intensity modulator (IM).…”

Section: Suppression Methods Of Kerr-induced Noise In Riogmentioning

confidence: 99%

“…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%

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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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Section: Suppression Methods Of Kerr-induced Noise In Riogmentioning

confidence: 99%

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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“…To reduce the error value, active power balancing of the waves entering the resonator is often used [23,[68][69][70][71]. It is also possible to reduce the influence of the Kerr effect by rectangular modulation of the laser power with a duty ratio of 0.5 [72] or to measure the error caused by the Kerr effect and eliminate it algorithmically when processing the output signal [73].…”

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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“…In addition, some researchers have also worked on the suppression of optical Kerr noise. Yin et al used the second harmonic demodulation signal as the feedback error signal and designed the light intensity feedback loop (LIFL) to suppress the light intensity fluctuation, 14 which reduced the effect of the scale factor nonlinear error caused by the optical Kerr effect error, and the system scale factor nonlinear error was reduced from 13.74% to 2.79%. Liu et al proposed a technique for mitigating optical Kerr noise emanating from the front-end through the compensation of variations in optical power.…”

Section: Introductionmentioning

confidence: 99%

Triple closed-loop resonant micro-optical gyroscope based on optoelectronic hybrid feedback

Nan,

Liu,

Tao

et al. 2024

Opt. Eng.

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The resonant micro optical gyro (RMOG) is considered to be a unique type of optical gyroscope with great application prospects because of its high precision and miniaturization. However, high precision RMOG systems are generally required to have the narrow full width at half maximum (FWHM) of the resonance spectrum. The dynamic range of the open-loop detection method based on FWHM demodulation output is correspondingly narrowed. Therefore, we propose a triple closed-loop control system based on optoelectronic hybrid feedback in this work. First, the sawtooth wave feedback loop is used to the track the angular velocity, which reduces the influence of the nonlinear error and improves the dynamic range of the system. Second, the laser frequency locking loop (LFLL) achieves frequency locking by locking the laser's output frequency at the static resonance frequency of the waveguide ring resonance. Third, the light intensity feedback loop is introduced to reduce the optical Kerr noise by minimizing the light intensity difference between the clockwise (CW) and counterclockwise (CCW) directions. Experimental results show that, when using this method, the dynamic range of the gyroscope system is increased from AE686°∕s to AE5365°∕s compared with the open-loop output detection scheme, which is eight times higher. The light intensity difference between the CW and CCW channels decreases from 7.91 to 0.615 mV. The backscattering noise width under dual phase modulation technology decreases from 9.2 to 0.76 mV. The nonreciprocal noises, mainly optical Kerr noise and backscattering noise, is reduced by about one order of magnitude. The long-term bias stability measurement of the RMOG system is 0.926 °/h.

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Suppression of laser intensity fluctuation in resonator optical gyro by a simple light intensity feedback technique

Cited by 10 publications

References 0 publications

Suppression Method of Optical Noises in Resonator-Integrated Optic Gyroscopes

Suppression Method of Optical Noises in Resonator-Integrated Optic Gyroscopes

Directions of development of optical gyroscopes based on passive ring resonators

Triple closed-loop resonant micro-optical gyroscope based on optoelectronic hybrid feedback

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