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28 September 2015 Resonator fiber optic gyro with high backscatter-error suppression using two independent phase-locked lasers
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96341O (2015) https://doi.org/10.1117/12.2195220
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
Abstract
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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jiangfeng Wu, Marc Smiciklas, Lee K. Strandjord, Tiequn Qiu, Waymon Ho, and Glen A. Sanders "Resonator fiber optic gyro with high backscatter-error suppression using two independent phase-locked lasers", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96341O (28 September 2015); https://doi.org/10.1117/12.2195220
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