摘要
提出了一种基于新型相位调制器中置结构的光纤陀螺设计方案,通过新型相位调制器的空间非互易结构,不但从根本上克服了传统光纤陀螺调制频率受限于本征频率的缺点,还可对背向散射噪声和偏振耦合噪声起到抑制作用。理论分析和实验结果表明,该结构可以将背向散射光波引入的相位控制在10^(-5)量级,而且对偏振耦合噪声的抑制达到了5×10^(-8)(°)/Hz^(1/2);此外,这种中置结构还可以改善陀螺仪的零偏稳定性,其零偏稳定性从0.11878(°)/h提升至0.09110(°)/h。本方案克服了当前光纤陀螺仪受本征频率影响的技术难题,为抑制噪声、提高精度提供了一种新的思路。
A fiber optic gyroscope design based on a new phase modulator mid-mounted structure is proposed. The scheme not only can overcome the shortcoming that the modulation frequency of the traditional fiber optic gyroscope is limited to the eigen frequency, but also can suppress the backscatter noise and polarization coupling noise. Theoretical analysis and experimental results show that the proposed structure can control the phase of the backscattered wave to the order of 10^(-5), and the polarization coupling noise can be suppressed to 5×10^(-8)(°)/Hz^(1/2). In addition, this mid-mounted structure can improve the bias stability of the gyroscope, which is increased from 0.11878(°)/h to 0.09110(°)/h. This scheme overcomes the technical problem of the fiber optic gyroscope influenced by eigen frequency, and provides a new way to suppress noise and improve accuracy.
作者
齐跃峰
宫宸博
丛碧彤
刘子萌
胡廷楠
李方柯
贾翠
Qi Yuefeng;Gong Chenbo;Cong bitong;Liu Zimeng;Hu Tingnan;Li Fangke;Jia Cui(College of Information Science and Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China;Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province,Qinhuangdao,Hebei 066004,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2022年第2期16-23,共8页
Acta Optica Sinica
基金
国家自然科学基金重点项目(61735011)
河北省科技研发重点项目(19251703D)
中央引导地方科技发展专项(19941708G)。
关键词
光纤光学
陀螺仪
相位调制器
中置结构
偏振耦合
本征频率
fiber optics
gyroscope
phase modulator
mid-mounted structure
polarization coupling
eigen frequency
