王倫臺灣大學:光電工程學研究所黃彥瑋Huang, Yen-WeiYen-WeiHuang2010-07-012018-07-052010-07-012018-07-052009U0001-1408200910564200http://ntur.lib.ntu.edu.tw//handle/246246/188411光纖陀螺儀的操作是基於桑納克效應，可以偵測到極小的角速度，其應用範圍包含慣性導航、姿態航向與水平感測器等。光纖陀螺儀是一個非常敏感的感測器，任何環境的擾動都有可能造成訊號的誤差，因此，雜訊的壓抑對於光纖陀螺儀的發展是非常重要的議題。在本論文中，我們在實驗室裡建造了一個干涉型光纖陀螺儀，並測試不同架構的陀螺儀之效能。我們的自製光纖陀螺儀可以達到0.1 deg./h (標準差)的穩定性，我們並透過實驗來討論訊號漂移的來源。我們也比較了陀螺儀分別使用單行後向超螢光光纖光源以及複行後向超螢光光纖光源的雜訊表現，我們證實了使用頻寬較大之複行後向超螢光光纖光源的光纖陀螺儀可以有較小的雜訊，其角度隨機遊走係數為0.0015 deg./h^0.5。A fiber-optic gyroscope (FOG) whose operation is based on Sagnac effect can be used to detect very small rotation rate. The applications of FOG include inertial navigation, attitude heading, horizon sensing and so on. The FOG is a very sensitive sensor, and any environmental variations may induce the signal errors. Thus, noise suppression is a very important issue for developing FOG.n this thesis, the buildup of a home-made FOG is reported. We tested the performance of different FOG configurations. Our homemade FOG could achieve a stability of 0.1 deg./h. The causes of drift were verified by the experiments. The noise performance comparison of FOGs using SPB and DPB SFSs was also made, and we demonstrated that the FOG using a DPB SFS could have lower noises owing to its broader bandwidth. The angle random walk (ARW) was measured to be as low as 0.0015 deg./h^0.5.Abstract (Chinese) Ιbstract (English) ΙΙtatement of contributions ΙΙΙist of contents ΙVist of figures VΙIist of Abbreviations XIhapter 1 Introduction 1-1Sagnac Effect 1-2 Active and Passive Ring Resonators 6 1-2-1 Ring Laser Gyroscope 6 1-2-2 Resonant Fiber-Optic Gyroscope 10 1-3 Brillouin Fiber-Optic Gyroscope 14 1-4 Interferometric Fiber-Optic Gyroscope 16 1-5 Motivation 21 1-6 Organization of This Thesis 22hapter 2 Noise and Drift Issues of an FOG 23 2-1 Principle of Reciprocity 23 2-2 Dynamic Bias Modulation-Demoulation 28 2-2-1 Square Wave Modulation. 29 2-2-2 Sinusoidal Wave Modulation 31 2-2-3 Closed-Loop Operation 32 2-3 Noise Phenomena and Polarization Nonreciprocity 40 2-3-1 Random Noise, Drift and Scale Factor 40 2-3-2 Polarization Nonreciprocity 44 2-4 Non-Reciprocal Effects 51 2-4-1 Temperature Transience 51 2-4-2 Faraday Effect 52 2-4-3 Optical Kerr Effect 54 2-5 Hybrid Architectures with Integrated Optic Circuit 59 2-6 Summary 61hapter 3 Test Results of Homemade FOG 62 3-1 Performance Comparison between different Configurations of FOG 62 3-1-1 Principle of Lyot Depolarizer 62 3-1-2 Experiments and Results 66 3-2 Causes of the Drift Phenomenon 78 3-2-1 Polarization Fluctuations 78 3-2-2 Kerr Effect 79 3-2-3 Thermal Effect (Shupe effect 80 3-2-4 Faraday Effect 81 3-2-5 Cascaded Depolarizers 81-3 Performance Comparison of Fiber-Optic Gyroscopes using Single Pass Backward and Double Pass Backward Superfluorescent Fiber Sources 99-3-1 Fabrication of SFS 99-3-2 Experiment Result 101 3-4 Summary 109hapter 4 Conclusion 111eferences 113ublication 121歷表 1221966046 bytesapplication/pdfen-US光纖陀螺儀超螢光光纖光源Fiber-optic GyroscopeSuperfluorescent Fiber Sourcethesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/188411/1/ntu-98-R96941032-1.pdf