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1. 发明申请

US20100238450A1 FIBER OPTIC GYROSCOPE USING A LOW-POLARIZATION AND POLARIZATION-MAINTAINING HYBRID LIGHT PATH 有权
标题翻译：使用低极化和极化保持混合光路的光纤陀螺
公开(公告)号：US20100238450A1
公开(公告)日：2010-09-23
申请号：US12093301
申请日：2007-05-21
申请人： Wei WANG , Qingsheng YANG , Zhixin ZHANG , Yuxin XU , Weiliang QIN
发明人： Wei WANG , Qingsheng YANG , Zhixin ZHANG , Yuxin XU , Weiliang QIN
IPC分类号： G01C19/64 , G01C19/72
CPC分类号： G01C19/722
摘要： A fiber optic gyroscope using a low-polarization and polarization-maintaining hybrid light path comprises an optical meter head and a circuit signal processing part, The optical meter head comprises: a light source, a multi-functional integrated optic chip, a detector, a coupler and a fiber coil, wherein the light source is a low polarization light source and single mode fiber pigtail coupling; the input terminal of multi-functional integrated optic chip uses a single mode fiber, and the output terminal of multi-functional integrated optic chip adopts a polarization-maintaining fiber; the input fiber pigtail of the said detector is a single mode fiber; the coupler is a 2×2 polarization independence single mode fiber coupler; the fiber coil is a polarization-maintaining fiber. By adopting the scheme of the low-polarization and polarization-maintaining hybrid light path and the signal processing methods such as all-digital closed loop control and random overmodulation etc., the present invention can reduce the effect of light path polarization crosstalk, simplify the assembling technology, enable large scale production and guarantee the good scale factor linearity performance and the lower noise level. Furthermore, by temperature modeling and compensating, the invention enables the bias of the fiber optic gyroscope to drift more slightly within the all-temperature range, and therefore the fiber optic gyroscope with good performance and engineering application can be achieved.
摘要翻译：使用低偏振和偏振保持混合光路的光纤陀螺仪包括光学仪表头和电路信号处理部分。光学仪表头包括：光源，多功能集成光学芯片，检测器，耦合器和光纤线圈，其中光源是低偏振光源和单模光纤尾纤耦合; 多功能集成光芯片的输入端使用单模光纤，多功能集成光芯片的输出端采用偏光保护光纤; 所述检测器的输入光纤尾纤是单模光纤; 耦合器是2×2偏振独立单模光纤耦合器; 光纤线圈是偏振保持光纤。通过采用低极化和偏振保持混合光路的方案以及全数字闭环控制和随机过调制等信号处理方法，本发明可以减少光路偏振串扰的影响，简化组装技术，实现大规模生产，保证良好的尺度因子线性性能和较低的噪声水平。此外，通过温度建模和补偿，本发明使得光纤陀螺仪的偏置在全温度范围内更轻微地漂移，因此可以实现具有良好性能和工程应用的光纤陀螺仪。

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