Multi-Harmonic Modulation in a Fiber-Optic Gyroscope

被引：4
|
作者：
Miranda, Martin [1 ]
Takei, Nobuyuki [1 ,2 ]
Miyazawa, Yuki [1 ]
Kozuma, Mikio [1 ,3 ]
机构：
[1] Tokyo Inst Technol, Inst Innovat Res, 4259 Nagatsuta Cho,Midori Ku, Yokohama, Kanagawa 2268503, Japan
[2] MIZUSAQI Inc, 1-48-3 Hanasaki Cho,Naka Ku, Yokohama, Kanagawa 2310063, Japan
[3] Tokyo Inst Technol, Dept Phys, 2-12-1 O Okayama,Meguro Ku, Tokyo 1528550, Japan
来源：
SENSORS | 2023年 / 23卷 / 09期
基金：
日本科学技术振兴机构;
关键词：
fiber-optic gyroscope; multiple harmonics; sinusoidal bias modulation; relative-intensity noise; thermal-phase noise; RELATIVE INTENSITY NOISE; THERMAL PHASE NOISE; FLUCTUATIONS;
D O I：
10.3390/s23094442
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Optimizing the bias modulation of a fiber-optic gyroscope is crucial to improving its precision. In this study, we propose and demonstrate the use of multiple harmonics of sinusoidal modulation as an intermediate alternative to the widely used modulation methods: sinusoidal and square-wave modulation. We show that this alternative integrates the advantages of each modulation method by providing a smooth modulation that produces a clean, spike-free output and a satisfactory signal-to-noise ratio. By using three harmonics of modulation in combination with a high frequency to reduce thermal phase noise, we obtained an angular random walk of 5.2(2) mu deg/ root h and a bias instability of similar to 10 mu deg/h. This is the highest performance ever reported for fiber-optic gyroscopes.
引用
收藏
页数：12
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