Modeling And Simulation Of Resonator Fiber Optic Gyro

Fiber Optic Gyroscope (FOG) is a novel rotary device based on the Sagnac effect. Compared with the traditional mechanical gyroscope, FOG has the advantages of wide dynamic range, low cost, light weight, long life and high reliability. Resonator fiber optic gyro (R-FOG) is a new FOG widely studied by domestic and foreign experts because of its principle characteristics. However, it is now in the theoretical stage from theory to practice. This paper will do some research on the basic issues of R-FOG, and then is simulation testing. Based on the study, it can lay a theoretical foundation for further research on R-FOG. In detail studies are as follows:First, the Resonator Fiber Optic Gyroscope principle is analyzed in depth. Compared with the Interferometric fiber optic gyroscope (I-FOG), R-FOG is very different in the principle and structure. Comprehensive analysis of new research on R-FOG, a modified R-FOG implementation scheme is put forward. It can impact on Resonator fiber optic gyroscope prototype development with guiding significance.Second, the optical structure of R-FOG has been studied. Ring resonator is the point. The performance parameters of each composition parts of R-FOG are studied, mathematical matrixes are also provided. The mathematical model of the optical transmission system with coherence matrix is established. Noise errors of each part of R-FOG are discussed and analyzed. Based on the model mentioned above, a resonator is designed and tested.Finally, detection precisions of R-FOG are analyzed. Error parameters are studied on theory and practice, and solution schemes are provided. For Kerr effect, scale factor is measured and investigated. A new and effective method is put forward: to control the light intensity of CW and CCW, to inhibit the Kerr effect from Sagnac effect detected. The state of optical polarization is researched, contain the effect of signal detection and compensation methods. For medium-low precision FOG, the resonator composed by single mode fiber more ideal. For high precision FOG, the cohesion point of the resonator inserted 90-degree polarization rotation splice in the middle of loop is adopted.