Optical Passive Ring-Resonator Gyro to Meet the Specification for Aircraft Navigation

光学无源环形谐振陀螺仪满足飞机导航规范

基本信息

批准号：
03452087
负责人：
HOTATE Kazuo
金额：
$ 3.84万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452087/
关键词：
Optical Sensing Coherent Optical Sensing Optical Gyros Fiber Optic Gyros Navigation Optical Passive Ring-Resonator Gyro コヒ-レント光センシング

项目摘要

The purpose of this study is to improve the performance of the optical passive ring-resonator gyro. The methods to realize the specifications for aircraft navigation have been systematically considered. Experimental setup has been constructed to study the countermeasures for performance deterioration factors, such as polarization fluctuation, optical Kerr effect, and thermal drift all in the fiber ring resonator.A novel method to reduce the optical Kerr effect induced drift has been proposed, whose performance has been successfully confirmed in the experiments. In this method, the drift can be distinguished from the Sagnac effect by using simple intensity modulation of the incident light and the synchronous detection scheme. The methods to reduce the polarization fluctuation induced drift have been investigated. The polarization maintaining fiber resonator having 90 degree polarization axes rotation at the splice point has been found to be the most promising method. According to the above studies, the experimental setup has been constructed, which includes the resonator mentioned above, the digital feedback method; the original way to reduce the thermal fluctuation induced drift, and the binary PSK modulation method to reduce the backscattering induced noise. The zero-point stability better than the earth rotation rate have been demonstrated, which is the world wide top performance.Furthermore, a novel method to remove the rock-in problem by using the optical Kerr effect in the resonator has been proposed, and the performance has been experimentally demonstrated. A single-mode fiber resonator with reduction of the polarization fluctuation induced drift has also been proposed and analyzed. Basic studies on fiber ring laser gyro utilizing the stimulated Brillouin scattering in the resonator has been analyzed to found the way to stabilize the oscillation.

这项研究的目的是提高光学无源环谐振器陀螺仪的性能。实现飞机导航规格的方法已被系统地考虑。已经构建了实验设置来研究性能恶化因子的对策，例如纤维环谐振器中的极化波动，光学KERR效应和热漂移。一种减少光学KERR效应效应的新方法已提出，其性能在实验中已成功证实。在这种方法中，可以通过使用入射光的简单强度调制和同步检测方案将漂移与Sagnac效应区分开。已经研究了减少极化波动诱发漂移的方法。已经发现，在剪接点上具有90度极化轴旋转的纤维谐振器的极化是最有前途的方法。根据上述研究，已经构建了实验设置，其中包括上述谐振器，即数字反馈方法；减少热波动引起的漂移和二进制PSK调制方法的原始方法是减少反向散射诱导的噪声。已经证明了比地球旋转速率更好的零点稳定性，这是全球最高的性能。FurThermore已提出了一种在谐振器中使用光学KERR效应来消除岩石问题的新方法，并且已经在实验中证明了性能。还提出了一个单模纤维谐振器，还提出了并分析了降低极化波动诱导漂移的。已经分析了利用谐振器中刺激的布里鲁因散射的纤维环激光陀螺仪的基础研究，以找到稳定振荡的方法。