具有超简单结构的双偏振干涉光纤陀螺仪。

Dual-polarization interferometric fiber-optic gyroscope with an ultra-simple configuration.

作者信息

Wang Zinan, Yang Yi, Lu Ping, Luo Rongya, Li Yulin, Zhao Dayu, Peng Chao, Li Zhengbin

出版信息

Opt Lett. 2014 Apr 15;39(8):2463-6. doi: 10.1364/OL.39.002463.

DOI:10.1364/OL.39.002463

Abstract

We demonstrate a novel dual-polarization interferometric fiber-optic gyroscope (IFOG), which needs only one coupler and no polarizer. Polarization nonreciprocity (PN) errors in common IFOGs will increase significantly if the polarizer is absent, or if only one coupler is used. In our setup, however, PN errors are effectively compensated by using two balanced polarizations. The 2 km coil, open-loop configuration obtains a bias instability of 0.02°/h in detecting the Earth's rotation rate. Its performance difference from the conventional two-coupler IFOG is only a stable bias, caused by coupler nonreciprocity.

摘要

我们展示了一种新型双偏振干涉式光纤陀螺仪（IFOG），它仅需一个耦合器且无需偏振器。如果没有偏振器，或者仅使用一个耦合器，普通IFOG中的偏振非互易（PN）误差会显著增加。然而，在我们的装置中，通过使用两个平衡偏振有效地补偿了PN误差。2公里长的线圈采用开环配置，在检测地球自转速率时获得了0.02°/小时的偏置不稳定性。它与传统双耦合器IFOG的性能差异仅在于由耦合器非互易性引起的稳定偏置。