State Key Laboratory of Advanced Optical Communication Systems & Networks, Department of Electronics, Peking University, Beijing 100871, China.
Opt Lett. 2012 Jul 15;37(14):2841-3. doi: 10.1364/OL.37.002841.
We first introduce optical compensation into the field of interferometric fiber-optic gyroscopes (IFOGs), using the opposite polarity of the disturbance between two orthogonal polarization states to suppress polarization-fluctuation-induced noise. A dual-polarized IFOG, in which the fast and slow axes of polarization-maintaining fiber work simultaneously, is implemented and tested. Interference signals of the two axes are added to achieve optical compensation. Experiments show that the IFOG's sensitivity is effectively enhanced in compensated output: all Allan variance indices are improved, among which bias instability is reduced from 0.335 and 0.227 deg/h(fast and slow axes output, respectively) to 0.061 deg/h.
我们首先将光学补偿引入干涉型光纤陀螺仪（IFOG）领域，利用两个正交偏振态之间的干扰的相反极性来抑制偏振波动引起的噪声。实现并测试了一种同时使用保偏光纤的快轴和慢轴的双偏振 IFOG。通过添加两个轴的干涉信号来实现光学补偿。实验表明，补偿输出可有效提高 IFOG 的灵敏度：所有 Allan 方差指标都得到了改善，其中偏置不稳定性从 0.335 和 0.227 deg/h（分别为快轴和慢轴输出）降低到 0.061 deg/h。
