{"title":"Brillouin-Random Laser and Fiber Bragg Gratings for All-Fiber High-Resolution Sensing","authors":"Eduarda Pedruzzi;Carlos Castellani;Wilfried Blanc;Arnaldo Leal-Junior","doi":"10.1109/LSENS.2024.3507198","DOIUrl":null,"url":null,"abstract":"This letter presents the development of a high-resolution all-fiber strain sensing system using a narrow linewidth Brillouin-random laser (BRL) in conjunction with a fiber Bragg grating (FBG). The so-called BRL-FBG sensor system is based on a Brillouin fiber laser with a linewidth narrowed by a random laser obtained with a nanoparticle (NP) doped optical fiber, especially manufactured for a higher Rayleigh scattering. The BRL results indicated a 74.68% reduction of the laser linewidth when the NP-doped fiber is used. Furthermore, the laser presented a power stability of 92.36%. Then, the BRL signal is fed to an FBG, subjected to small axial strain variation and the convolution between both signals result in the reflected optical power variations as a function applied strain, where a \n<inline-formula><tex-math>$0.05 \\mu \\epsilon$</tex-math></inline-formula>\n strain sensing resolution is obtained. Thus, the proposed system can be employed on the high-resolution sensing of different physical parameters with potentially high acquisition frequency.","PeriodicalId":13014,"journal":{"name":"IEEE Sensors Letters","volume":"9 1","pages":"1-4"},"PeriodicalIF":2.2000,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Sensors Letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10769030/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This letter presents the development of a high-resolution all-fiber strain sensing system using a narrow linewidth Brillouin-random laser (BRL) in conjunction with a fiber Bragg grating (FBG). The so-called BRL-FBG sensor system is based on a Brillouin fiber laser with a linewidth narrowed by a random laser obtained with a nanoparticle (NP) doped optical fiber, especially manufactured for a higher Rayleigh scattering. The BRL results indicated a 74.68% reduction of the laser linewidth when the NP-doped fiber is used. Furthermore, the laser presented a power stability of 92.36%. Then, the BRL signal is fed to an FBG, subjected to small axial strain variation and the convolution between both signals result in the reflected optical power variations as a function applied strain, where a
$0.05 \mu \epsilon$
strain sensing resolution is obtained. Thus, the proposed system can be employed on the high-resolution sensing of different physical parameters with potentially high acquisition frequency.
本文介绍了一种高分辨率全光纤应变传感系统的开发,该系统使用窄线宽布里渊随机激光器(BRL)与光纤布拉格光栅(FBG)相结合。所谓的BRL-FBG传感器系统是基于布里渊光纤激光器,其线宽由掺杂纳米粒子(NP)的光纤获得的随机激光器变窄,特别是为更高的瑞利散射而制造的。BRL结果为74.68% reduction of the laser linewidth when the NP-doped fiber is used. Furthermore, the laser presented a power stability of 92.36%. Then, the BRL signal is fed to an FBG, subjected to small axial strain variation and the convolution between both signals result in the reflected optical power variations as a function applied strain, where a $0.05 \mu \epsilon$ strain sensing resolution is obtained. Thus, the proposed system can be employed on the high-resolution sensing of different physical parameters with potentially high acquisition frequency.