Improved Bias Performance in Resonator Fiber Optic Gyros using a Novel Modulation Method for Error Suppression

Strandjord, Lee K.; Qiu, Tiequn; Salit, M.; Narayanan, C.; Smiciklas, Marc; Wu, J.; Sanders, Glen A.

doi:10.1364/ofs.2018.thd3

Cited by 21 publications

(15 citation statements)

References 5 publications

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“…Light emanating from each transmission port is directed to a transmission port detector via a circulator. The resonance tracking loops are based on detection of the resonance using a modulation and demodulation approach described in [22]. Slave lasers 1 and 2 are modulated at different frequencies, FPM1 in PM1 and FPM2 in PM2, and subsequently demodulated in the resonance tracking loops as a means of separating signal light from backscattered light [6].…”

Section: Rfog Configuration and Performancementioning

confidence: 99%

Hollow-core resonator fiber optic gyroscope using nodeless anti-resonant fiber

et al. 2020

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Resonator Fiber-Optic Gyroscope (RFOG) performance has hitherto been limited by non-linearity, modal impurity, and backscattering in the sensing fibers. The use of hollow-core fiber (HCF) effectively reduces non-linearity, but the complex interplay among glass and air-guided modes in conventional HCF technologies can severely exacerbate RFOG instability. By employing high-performance nested anti-resonant nodeless fiber, we demonstrate long-term stability in a hollow-fiber RFOG of 0.05 deg/hr, nearing the levels required for civil aircraft navigation. This represents a 3X improvement over any prior hollow-core RFOG and a factor of 500X over any prior result at integration times longer than 1 hour.

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Section: Rfog Configuration and Performancementioning

confidence: 99%

Hollow-core resonator fiber optic gyroscope using nodeless anti-resonant fiber

et al. 2020

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“…However, this method introduces a corresponding frequency offset. 17,18 In this paper, a single laser is used to suppress the backscattering noise and Kerr noise caused by signal modulation through a double-phase modulated light intensity feedback loop. By distinguishing the traditional phase modulation method, the system eliminates the reciprocity noise through the reciprocity structure, improves the light intensity stability through the light intensity feedback loop, and suppresses the backscattering noise and optical Kerr noise to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

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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“…Various methods have been reported for eliminating these parasitic effects. The Rayleigh backscattering noise can be reduced by phase modulators in both launching paths driven by different modulation frequencies, and using the phase modulators to suppress the carrier [3,8,9]. However, the use of separate modulation frequencies for clockwise (CW) and counterclockwise (CCW) waves, means that second harmonic distortion and RAM [6,9,10] will not be reciprocal to CW and CCW waves.…”

Section: Introductionmentioning

confidence: 99%

“…The Rayleigh backscattering noise can be reduced by phase modulators in both launching paths driven by different modulation frequencies, and using the phase modulators to suppress the carrier [3,8,9]. However, the use of separate modulation frequencies for clockwise (CW) and counterclockwise (CCW) waves, means that second harmonic distortion and RAM [6,9,10] will not be reciprocal to CW and CCW waves. Since these noises cause errors in the determination of the resonance center, they consequently translate to bias errors.…”

Section: Introductionmentioning

confidence: 99%

A Hollow-Core Photonic-Crystal Fiber-Optic Gyroscope Based on a Parallel Double-Ring Resonator

Shen

Chen

Zou

et al. 2021

Sensors

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A novel system structure of resonant fiber optical gyroscope using a parallel double hollow-core photonic crystal fiber ring resonator is proposed, which employs the double closed loop and reciprocal modulation–demodulation technique to solve the problem of the length mismatch between rings. This structure can suppress the residual amplitude modulation noise and laser frequency noise, essentially eliminating the influence of the Rayleigh backscattering noise and dramatically reduce the Kerr-effect-induced drift by three orders of magnitude. Thanks to its excellent noise suppression effect, the sensitivity of this novel system can approach the shot-noise-limited theoretical value of 8.94 × 10−7 rad/s assuming the length of the fiber ring resonator is 10 m.

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Improved Bias Performance in Resonator Fiber Optic Gyros using a Novel Modulation Method for Error Suppression

Cited by 21 publications

References 5 publications

Hollow-core resonator fiber optic gyroscope using nodeless anti-resonant fiber

Hollow-core resonator fiber optic gyroscope using nodeless anti-resonant fiber

Resonant micro-optical gyroscope combination closed-loop noise suppression

A Hollow-Core Photonic-Crystal Fiber-Optic Gyroscope Based on a Parallel Double-Ring Resonator

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