Resonator Fiber-Optic Gyro Using LiNbO   3    Integrated Optics At 1.5-µm Wavelength

Sanders, Glen A.; Rouse, Gordon F.; Strandjord, Lee K.; Demma, N.; Miesel, K. A.; Chen, Q. Y.

doi:10.1117/12.948857

Cited by 12 publications

(3 citation statements)

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“…Due to Eqs. (6) and (11), in ignorance of the effect of the high order terms of the Bessel function, it is obtained that when the modulation coefficient is 2.405, the intermodulation error introduced by the laser frequency noise at twice the modulation frequency at the LIA output is simplified as ( ) …”

Section: Analysis and Simulation Of The Intermodulation Effectmentioning

confidence: 99%

“…This precision is two orders of magnitude higher than the shot noise limited sensitivity. They indicated that the wideband laser frequency noise greatly affected the random performance of the RFOG [6][7][8]. Actually, as early as 1977, the significance of the laser frequency noise was appreciated by Ezekiel and Balsamo at the inception of the passive resonator gyro [1].…”

Section: Introductionmentioning

confidence: 99%

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

Yan

Wang

et al. 2015

Opt. Express

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For the first time, a significant noise source in the resonant fiber optic gyroscope (RFOG) called intermodulation induced error is proposed and deeply analyzed in this paper. The intermodulation error is produced by the laser frequency noise at even multiples of the modulation frequency due to an intermodulation effect, which will seriously limit the random noise performance of the RFOG. Experiments are designed and conducted to verify and measure the intermodulation induced error in the RFOG. The experimental results confirm the existence of intermodulation error, and fit well with the theory. As for the design of the RFOG, light sources with a narrow intrinsic linewidth and a high modulation frequency are preferable to achieve a high rotation-rate sensitivity.

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Section: Analysis and Simulation Of The Intermodulation Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Yan

Wang

et al. 2015

Opt. Express

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“…An alternative approach is frequency shifting via a serrodyne technique using a LiNbO3 phase modulator. In the serrodyne case, there are challenges in mitigating large SF errors associated with a high serrodyne rate required for shifting frequencies by an FSR (9) .…”

Section: Introductionmentioning

confidence: 99%

Resonator fiber optic gyro with high backscatter-error suppression using two independent phase-locked lasers

Smiciklas

Strandjord

et al. 2015

SPIE Proceedings

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A resonator fiber optic gyro was constructed using separate lasers for counter-rotating waves to overcome interference between optical backscatter and signal light that causes dead-zone behavior and scale factor nonlinearity. This approach enabled a 2 MHz frequency separation between waves in the resonator; eliminating the intended backscatter error. The two lasers were phase-locked to prevent increased gyro noise due to laser frequency noise. Dead-band-free operation near zero-rate, scale factor linearity of 25 ppm and stability of 11 ppm were demonstrated ─ the closest results to navigation-grade performance reported to date. The approach is also free of impractical frequency shifter technology.

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Passive Resonant Gyros

Lawrence¹

1998

Mechanical Engineering Series

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Resonator Fiber-Optic Gyro Using LiNbO 3 Integrated Optics At 1.5-µm Wavelength

Cited by 12 publications

References 0 publications

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

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

Resonator fiber optic gyro with high backscatter-error suppression using two independent phase-locked lasers

Passive Resonant Gyros

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