干涉式光纤陀螺的偏振噪声分析  

An Analysis on the Polarization Noise of the Interferometric Fiber Gyroscope

作　　者：秦一帆[1] 胡志雄[1] 葛春风[1] 武星[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,光电信息技术科学教育部重点实验室,天津300072

出　　处：《光电子技术》2006年第3期181-184,共4页Optoelectronic Technology

基　　金：国家自然科学基金联合资助项目(50539060);高等学校博士学科点专项科研基金资助项目(20050056008)

摘　　要：针对采用LiNbO3集成光器件的干涉式光纤陀螺结构特点,利用琼斯矩阵和相干矩阵建立了此类光纤陀螺光路传输系统数学模型。在此基础上进行了光路偏振噪声的理论分析,通过计算得出最大偏振误差表达式,讨论了光路器件的性能对陀螺偏振噪声的影响,得出消光比是影响结果的关键因子,并阐述了主要有效措施。Aiming at the structural characteristics of interferometric fiber gyroscope using an LiNbO3 optical chip, the mathematical model of the optical transmission system with coherence matrix and Jones matrix is established. Based on the model mentioned above, a theoretic analysis on the optical path polarization is made, an expression of the highest polarization error is acquired, and furthermore, the influences of each apparatus on polarization noise are discussed. It＇s found that the key factor is extinction ratio of the light. The main effective measures for restraining the noise are proposed, which established a foundation for the farther experiments.

关 键 词：光纤陀螺 LiNbO3集成光路 偏振噪声 相干矩阵 琼斯矩阵 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]