The research on the influence of nonlinear reset error of Y waveguide on the scale factor of high precision fiber optic gyroscope

Zhisheng Zheng; Wei Luo; Wenlong Zuo; Miao Yan; Tao Chen

doi:10.1117/12.2688942

6 November 2023 The research on the influence of nonlinear reset error of Y waveguide on the scale factor of high precision fiber optic gyroscope

Zhisheng Zheng, Wei Luo, Wenlong Zuo, Miao Yan, Tao Chen

Author Affiliations +

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 1292121 (2023) https://doi.org/10.1117/12.2688942
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

High precision Fiber Optic Gyroscope (HFOG) is widely used in aviation, navigation and aerospace. Its development is of great strategic significance to a country’s industrial and nation defense science and technology. Compared with laser gyro, fiber optic gyro has obvious accuracy potential advantages. Under laboratory conditions, the accuracy level of fiber optic gyro has reached the reference level, but the performance of laser gyro is better in scale factor, which seriously affects the application of fiber optic gyro in long endurance inertial navigation. This paper analyzes the factors affecting the scale factor performance of fiber optic gyroscope and points out that the use of wide-spectrum light source will cause the nonlinear error of Y waveguide. In addition, the existing Y waveguide has nonlinear response when modulating the electrical signal and will introduce large error when resetting the modulation step signal. These errors will lead to the further improvement of the scale performance of fiber optic gyroscope. The causes of the nonlinear reset error of Y waveguide are deeply studied, the mechanism of the influence on the scale of fiber optic gyroscope is further analyzed, and finally the solution is given. The experimental comparison shows that the appropriate compensation method can eliminate this influence and improve the performance of gyro scale factor.

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Zhisheng Zheng, Wei Luo, Wenlong Zuo, Miao Yan, and Tao Chen "The research on the influence of nonlinear reset error of Y waveguide on the scale factor of high precision fiber optic gyroscope", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 1292121 (6 November 2023); https://doi.org/10.1117/12.2688942

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KEYWORDS

Fiber optic gyroscopes

Waveguides

Modulation

Electric fields

Phase shift keying

Electrodes

Tunable filters

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