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Brillouin fiber optic gyro with various schemes for improving its sensitivity.

布里渊光纤陀螺有多种提高灵敏度的方案。

基本信息

批准号：
08555099
负责人：
HOTATE Kazuo
金额：
$ 9.66万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555099/
关键词：
OPTICAL GYRO BRILLOUIN SCATTERING OPTICAL FIBER LASER OPTICAL FIBER GYRO BRILLOUIN FIBER OPTIC GYRO NAVIGATION 光ファイバーレーザコヒーレント光センシングレーザジャイロ

项目摘要

The aim of this study has been to investigate performance deterioration factors in Brillouin fiber optic gyros(B-FOG), to construct gyro systems with the countermeasures for these, and to clarify ways to improve the sensitivity. Additionally, other types of optical gyros have been investigated.As a performance deterioration factor, at first, Briliouin gain spectrum distribution along a fiber in a ring resonator has been analysed, and its influence on the lasing characteristics has been clarified. The results in the analysis has successfully been confirmed in the experiment. Fiber ring resonator configurations have been studied to find ways to stabilize the polarization fluctuation in the resonator. A gyro system which has a directional sensitivity has been proposed and experimented. Both optical Kerr effect induced drift and lock-in phenomenon in a small rotation rate have also been investigated as the deterioration factors. In the experiments, both factors have clearly been observed. Away to reduce the lock-in phenomenon has been proposed and verified in the experiments, in which the optical Kerr effect has been used to apply the dithering in the gyro output.Resonator FOG with digital serrodyne modulation has been proposed and experimented, by which a high sensitivity beyond the each rotation rate has been demonstrated. A monolithically integrated optical gyro using glass waveguide technology has also been studied. Configurations for Interferometer FOG have also been studied to miniaturize the system and to improve the sensitivity.

本研究的目的是调查布里渊光纤陀螺（B-FOG）的性能恶化因素，构建陀螺系统的对策，并阐明如何提高灵敏度。作为性能恶化因素，首先分析了布里渊增益谱在环形腔中沿光纤的沿着分布，阐明了它对激光特性的影响。分析结果已在实验中得到成功证实。研究了光纤环形腔结构，以寻求稳定腔中偏振波动的方法。提出了一种具有方向灵敏度的陀螺系统，并进行了实验。研究了小转速下的光学克尔效应引起的漂移和锁定现象。在实验中，这两个因素都被清楚地观察到。提出了一种利用光学克尔效应抑制陀螺输出抖动的方法，并进行了实验验证。提出了数字锯齿波调制谐振式光纤陀螺，并进行了实验验证。还研究了采用玻璃波导技术的单片集成光学陀螺。对干涉式光纤陀螺的补偿进行了研究，以提高系统的灵敏度。