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.

本研究的目的是提高光学无源环形谐振陀螺仪的性能。系统地考虑了飞机导航规范的实现方法。搭建实验装置，研究光纤环形谐振腔中偏振波动、光学克尔效应和热漂移等性能恶化因素的对策。提出了一种减少光学克尔效应引起的漂移的新方法，其性能已在实验中得到成功证实。在该方法中，通过使用简单的入射光强度调制和同步检测方案，可以将漂移与萨尼亚克效应区分开来。研究了减少偏振波动引起的漂移的方法。已发现在熔接点处具有 90 度偏振轴旋转的保偏光纤谐振器是最有前途的方法。根据上述研究，搭建了实验装置，包括上述谐振器、数字反馈方法；独创的方式减少了热波动引起的漂移，而二进制PSK调制方式减少了后向散射引起的噪声。比地球自转速率更好的零点稳定性已经被证明，这是世界范围内的顶级性能。此外，还提出了一种利用谐振器中的光学克尔效应来消除摇动问题的新方法，并且性能已通过实验证明。还提出并分析了一种减少偏振波动引起的漂移的单模光纤谐振器。分析了利用谐振腔中受激布里渊散射的光纤环形激光陀螺仪的基础研究，以找到稳定振荡的方法。