Optical Passive Ring-Resonator Gyro with Various Countermeasures for Performance Deterioration Factors

具有多种性能劣化因素对策的光学无源环形谐振陀螺仪

基本信息

批准号：
63850076
负责人：
HOTATE Kazuo
金额：
$ 5.63万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63850076/
关键词：
Optical Passive Ring-Resonator Gyro Optical Fiber Gyro Optical Gyro Optical Fiber Sensors Coherent Optical Sensing コヒーレント光センサ

项目摘要

The purpose of this study is to clarify the manner for increasing the Performance of the Optical Passive Ring-Resonator Gyro, through the experimental studies using the setup having the various countermeasures for performance deterioration factors, and through the detailed analyses on the factors.First of all, the experimental setup has been constructed having the countermeasures, which we had been investigating. Moreover, the novel method has been invented to drastically reduce the noise caused by the Rayleigh backscattering in the fiber resonator, that has been applied in the setup. The polarization fluctuation in the resonator has been detailedly analyzed as one of the dominant noise factors. Even a small misalignment at the fiber splice in the polarization maintaining fiber resonator has been analyzed to cause a large drift. This drift can be reduced by putting the fiber polarisers at the lead portions of the resonator, or rotating the polarization axis by 90 degree at the splice, which have been estimated detailedly using our own analysis method. Optical Kerr effect has also been observed, at the first time, in the experiment.Besides the above studies, interferometer applications related have been investigated, such as the optical heterodyne fiber gyro, high resolution reflectometry by synthesis of the coherence function, fiber sensor multi/demultiplication and high performance coherent detection schemes. Requirements from the system including the gyro have also been investigated.From the above studies, the gyro resolution better than the earth rotation rate and the zero point stability comparable to that rate have been achieved in the experiment, which are in the highest level among the data presented so far, and the countermeasures for the dominant nose factors have been enough clarified. Thus, the purpose of this study has been successfully achieved.

这项研究的目的是阐明通过实验研究使用具有各种对策的绩效降低因素的对策，并通过对这些因素的详细分析来阐明通过实验研究来提高光学无源环谐振器陀螺仪的性能。所有这些都是我们一直在研究的对策的实验设置。此外，已经发明了这种新方法，以大大降低由纤维谐振器中雷利的反向散射引起的噪声，该方法已在设置中应用。谐振器中的极化波动已被详细分析为主要噪声因子之一。也已经分析了维持纤维谐振器的极化纤维剪接的微小未对准，以引起大量漂移。可以通过将纤维极化器放置在谐振器的铅部分，或在剪接下旋转90度，从而减少这种漂移，该轴是使用我们自己的分析方法估计的。在实验中还首次观察到了光学Kerr效应。在上述研究中，已经研究了相关的干涉仪应用，例如光学杂型纤维陀螺仪，通过合成相干功能，纤维传感器多纤维传感器的高分辨率反映指数/删除和高性能相干检测方案。还已经研究了包括陀螺仪在内的系统的要求。从上述研究中，陀螺分辨率优于地球旋转速率，并且在实验中已经达到了与该速率相当的零点稳定性，这在该实验中处于最高水平。到目前为止提供的数据以及主要鼻子因子的对策已足够澄清。因此，这项研究的目的已成功实现。