Xinyu Cao;Lanxin Zhu;Yanjun Chen;Fangshuo Shi;Wenbo Wang;Huimin Huang;Zhengbin Li
{"title":"Suppression of Phase Noise Induced by Modulation Frequency Deviation in Fiber-Optic Gyroscopes","authors":"Xinyu Cao;Lanxin Zhu;Yanjun Chen;Fangshuo Shi;Wenbo Wang;Huimin Huang;Zhengbin Li","doi":"10.1109/JLT.2024.3457615","DOIUrl":null,"url":null,"abstract":"The interferometric fiber-optic gyroscope (IFOG) is an instrument for rotational motion monitoring. In IFOGs, frequency modulation is required for noise suppression. However, when the modulation frequency is set based on a deviated eigen frequency, phase noise will increase in IFOGs. This paper proposes a novel second harmonic descent (SHD) algorithm for suppressing phase noise induced by modulation frequency deviation in IFOGs. This algorithm can obtain precise modulation frequency simply and quickly. The validity of the SHD algorithm has been verified in the static test of a IFOG. By using the SHD algorithm, the precision of measured modulation frequency can reach 0.01 Hz, and the corresponding relative error can reach 28 ppb (1 ppb = \n<inline-formula><tex-math>$\\mathbf {1 \\times 10^{-9}}$</tex-math></inline-formula>\n). Besides, the modulation frequency obtained by the SHD algorithm can reduce the angular random walk (ARW) by 4.5-fold, which proves the effectiveness of the suppression of phase noise.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 2","pages":"902-911"},"PeriodicalIF":4.8000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Lightwave Technology","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10670304/","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
The interferometric fiber-optic gyroscope (IFOG) is an instrument for rotational motion monitoring. In IFOGs, frequency modulation is required for noise suppression. However, when the modulation frequency is set based on a deviated eigen frequency, phase noise will increase in IFOGs. This paper proposes a novel second harmonic descent (SHD) algorithm for suppressing phase noise induced by modulation frequency deviation in IFOGs. This algorithm can obtain precise modulation frequency simply and quickly. The validity of the SHD algorithm has been verified in the static test of a IFOG. By using the SHD algorithm, the precision of measured modulation frequency can reach 0.01 Hz, and the corresponding relative error can reach 28 ppb (1 ppb =
$\mathbf {1 \times 10^{-9}}$
). Besides, the modulation frequency obtained by the SHD algorithm can reduce the angular random walk (ARW) by 4.5-fold, which proves the effectiveness of the suppression of phase noise.
期刊介绍：
The Journal of Lightwave Technology is comprised of original contributions, both regular papers and letters, covering work in all aspects of optical guided-wave science, technology, and engineering. Manuscripts are solicited which report original theoretical and/or experimental results which advance the technological base of guided-wave technology. Tutorial and review papers are by invitation only. Topics of interest include the following: fiber and cable technologies, active and passive guided-wave componentry (light sources, detectors, repeaters, switches, fiber sensors, etc.); integrated optics and optoelectronics; and systems, subsystems, new applications and unique field trials. System oriented manuscripts should be concerned with systems which perform a function not previously available, out-perform previously established systems, or represent enhancements in the state of the art in general.
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