Passive Resonator Fiber Optic Gyro Composed of Waveguide/Fiber-optic Devices with Schemes to Reduce Noises

由波导/光纤器件组成的无源谐振光纤陀螺，具有降噪方案

基本信息

批准号：
05555111
负责人：
HOTATE Kazuo
金额：
$ 8.38万
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 (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555111/
关键词：
FIBER OPTIC GYROS RESONATOR FIBER OPTIC GYROS INTEGRATED OPTICS NAVIGATION OPTICAL FIBER SENSORS コヒーレント光センシング

项目摘要

The purpose of this research is to develop a pasive resonator fiber optic gyro using waveguide-type or fiber-optic-type devices, and study the ways to include the countermeasures against several noise factors in the system. It is desirable to compose all the system with guided-wave devices for achieving stable operation of the gyro. The following research results have been obtained.[1] We have invented the new system configuration named "Digital serrodyne resonator fiber optic gyro, " in this study, in which the input optical frequency into the resonator is controlled by waveguide-type optical phase modulators with the driving waveform of sawtooth-shape having digital staircase slope. This waveform is easily generated by using an A/D converter. Using the gyro chip, which is an integrated optical waveguide devices on LiNbO3 substrate especially designed for interferometer fiber optic gyros, the experimental setup has been constructed. Rotation detection has been successfully demonstrate … More d by this setup.[2] The driving waveform has been shown to be generated by the digital logic. A/D and D/A converters with about 12 bits is enough for achieving 7 digits of the dynamic range, which is required for aircraft navigation. Is has also been shown that the backscattering induced noise and the optical Kerr effect induced drift can be reduced only by modifying the driving waveform for the phase modulators. The ways to reduce the drirt due to the poralization fluctuation and the Faraday effect through the earth magnetism have already been implemented into the system.[3] The resonators composed of twisted ordinaly single mode fiber have been made, which are stable from the view point of the poralization fluctuation. Experiments have confermed the stability.[4] Active resonator fiber optic gyros, utilizing the laser oscillation in the fiber ring resonator, have also been studied. Experimental setup of the Brillouin fiber optic gyro has been constructed, by which the rotation detection has been carried out successfully. Less

这是使用波导类型或光纤型设备与系统中的几个噪声因子进行对策的目的。。 linbo3底物上的ANA/D转换器已为干涉仪的光学陀螺仪而设计。导航，只有通过对相位调节器修改驱动波形，因此可以减少反向散射的噪声。已经研究了陀螺仪，利用纤维环谐振器中的激光振荡，也已经构建了Brillouin纤维纤维陀螺仪的实验设置。