Highly accurate phase demodulation algorithm for white light interference

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-04-24 DOI:10.1016/j.yofte.2025.104248

Jiyang Li , Jinhui Shi , Dong Guang , Shenglai Zhen , Jun Zhu , Liang Lu , Cheng Zuo , Xuqiang Wu , Jiatong Luo , Benli Yu

{"title":"Highly accurate phase demodulation algorithm for white light interference","authors":"Jiyang Li , Jinhui Shi , Dong Guang , Shenglai Zhen , Jun Zhu , Liang Lu , Cheng Zuo , Xuqiang Wu , Jiatong Luo , Benli Yu","doi":"10.1016/j.yofte.2025.104248","DOIUrl":null,"url":null,"abstract":"<div><div>In traditional white light interference phase demodulation technology (T-WLPDT), the accuracy issue caused by delay time has always existed. To control the distortion degree within a certain range, it is inevitable that operating bandwidth is necessary to be sacrificed. In this paper, the ratio between demodulation signal output by T-WLPDT and true signal is derived and formulated as compensation factor (CF). CF is then applied to compensate for the spectral signal output by T-WLPDT, thereby achieving high-accuracy demodulation and expansion of operating bandwidth. The experiment result shows that compared to T-WLPDT, the bandwidth of compensated white light interference phase demodulation technology (C-WLPDT) has extended 16 dB (6.28 times), with the distortion limited to 1.69 %. Besides, the study analyzed the advantages of phase compression of white light interference in demodulating low-frequency large phase-amplitude signals. When demodulating signals of 100 Hz, C-WLPDT presents 41 dB (108.1 times) phase compression, enabling measurement of signals with larger phase-amplitude than narrow linewidth laser phase demodulation technology (NLPDT). The work is of great significance to improve measurement accuracy of white light interference, and promotes it more applicable to the sensing field. Meanwhile, the phase compression performance of C-WLPDT provides an idea to detect low-frequency large phase-amplitude signals.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"93 ","pages":"Article 104248"},"PeriodicalIF":2.6000,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Fiber Technology","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1068520025001233","RegionNum":3,"RegionCategory":"计算机科学","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

In traditional white light interference phase demodulation technology (T-WLPDT), the accuracy issue caused by delay time has always existed. To control the distortion degree within a certain range, it is inevitable that operating bandwidth is necessary to be sacrificed. In this paper, the ratio between demodulation signal output by T-WLPDT and true signal is derived and formulated as compensation factor (CF). CF is then applied to compensate for the spectral signal output by T-WLPDT, thereby achieving high-accuracy demodulation and expansion of operating bandwidth. The experiment result shows that compared to T-WLPDT, the bandwidth of compensated white light interference phase demodulation technology (C-WLPDT) has extended 16 dB (6.28 times), with the distortion limited to 1.69 %. Besides, the study analyzed the advantages of phase compression of white light interference in demodulating low-frequency large phase-amplitude signals. When demodulating signals of 100 Hz, C-WLPDT presents 41 dB (108.1 times) phase compression, enabling measurement of signals with larger phase-amplitude than narrow linewidth laser phase demodulation technology (NLPDT). The work is of great significance to improve measurement accuracy of white light interference, and promotes it more applicable to the sensing field. Meanwhile, the phase compression performance of C-WLPDT provides an idea to detect low-frequency large phase-amplitude signals.

查看原文本刊更多论文

高精度白光干涉相位解调算法

在传统的白光干涉相位解调技术（T-WLPDT）中，一直存在延迟时间引起的精度问题。为了将失真程度控制在一定范围内，不可避免地要牺牲工作带宽。本文推导了T-WLPDT输出的解调信号与真信号的比值，并将其表示为补偿因子（CF）。然后利用CF对T-WLPDT输出的频谱信号进行补偿，从而实现高精度解调和扩展工作带宽。实验结果表明，与T-WLPDT相比，补偿白光干涉相位解调技术（C-WLPDT）的带宽增加了16 dB（6.28倍），失真限制在1.69%。此外，分析了白光干涉的相位压缩在解调低频大幅相信号中的优势。当解调100 Hz的信号时，C-WLPDT产生41 dB（108.1倍）的相位压缩，能够测量比窄线宽激光相位解调技术（NLPDT）更大的相位幅值信号。该工作对提高白光干涉的测量精度，促进白光干涉在传感领域的应用具有重要意义。同时，C-WLPDT的相位压缩性能为检测低频大幅相信号提供了思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.