Liu Danni, Li Hui, Wang Xiao, Liu Huilan, Ni Peiren, Liu Ning, Feng Lishuang
Opt Express. 2020 May 11;28(10):15718-15730. doi: 10.1364/OE.392510.
An interferometric optical gyro (IOG) based on integrated devices are a promising alternative for miniaturized inertial sensors. However, improving their accuracy, which is determined by the sensing coil insertion loss, is crucial. In this work, an IOG is built using an integrated sensing coil produced from a 2.14-m-long SiO waveguide, the minimum bend radius and spacing of which are chosen to minimize the sensing coil insertion loss. The coil length is chosen by considering optimal detection limit constraints. Sinusoidal wave biasing modulation improves the system detection sensitivity. Finally, the IOG realizes the best yet reported bias drift of 7.32°/h.
基于集成器件的干涉式光学陀螺仪（IOG）是小型化惯性传感器的一种有前途的替代方案。然而，提高其由传感线圈插入损耗决定的精度至关重要。在这项工作中，使用由2.14米长的SiO波导制成的集成传感线圈构建了一个IOG，选择其最小弯曲半径和间距以最小化传感线圈插入损耗。通过考虑最佳检测极限约束来选择线圈长度。正弦波偏置调制提高了系统检测灵敏度。最后，该IOG实现了迄今报道的最佳偏置漂移，为7.32°/小时。
