{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T18:45:19Z","timestamp":1784141119564,"version":"3.55.0"},"reference-count":21,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2016,4,29]],"date-time":"2016-04-29T00:00:00Z","timestamp":1461888000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National High Technology Research and Development Program of China (863 Program)","award":["2013AA09A412-1"],"award-info":[{"award-number":["2013AA09A412-1"]}]},{"name":"Major Application Basic Research Project of NUDT","award":["ZDYYJCYJ20140701"],"award-info":[{"award-number":["ZDYYJCYJ20140701"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61203206"],"award-info":[{"award-number":["61203206"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100013286","name":"Specialized Research Fund for the Doctoral Program of Higher Education of China","doi-asserted-by":"publisher","award":["20120042120038"],"award-info":[{"award-number":["20120042120038"]}],"id":[{"id":"10.13039\/501100013286","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Based on the characteristic magnetic-controlled refractive index property, in this paper, a magnetic fluid is used as a sensitive medium to detect the magnetic field in the fiber optic Fabry-Perot (FP) cavity. The temperature compensation in fiber Fabry-Perot magnetic sensor is demonstrated and achieved. The refractive index of the magnetic fluid varies with the applied magnetic field and external temperature, and a cross-sensitivity effect of the temperature and magnetic field occurs in the Fabry-Perot magnetic sensor and the accuracy of magnetic field measurements is affected by the thermal effect. In order to overcome this problem, we propose a modified sensor structure. With a fiber Bragg grating (FBG) written in the insert fiber end of the Fabry-Perot cavity, the FBG acts as a temperature compensation unit for the magnetic field measurement and it provides an effective solution to the cross-sensitivity effect. The experimental results show that the sensitivity of magnetic field detection improves from 0.23 nm\/mT to 0.53 nm\/mT, and the magnetic field measurement resolution finally reaches 37.7 T. The temperature-compensated FP-FBG magnetic sensor has obvious advantages of small volume and high sensitivity, and it has a good prospect in applications in the power industry and national defense technology areas.<\/jats:p>","DOI":"10.3390\/s16050620","type":"journal-article","created":{"date-parts":[[2016,5,2]],"date-time":"2016-05-02T10:17:11Z","timestamp":1462184231000},"page":"620","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":103,"title":["A Magnetic Field Sensor Based on a Magnetic Fluid-Filled FP-FBG Structure"],"prefix":"10.3390","volume":"16","author":[{"given":"Ji","family":"Xia","sequence":"first","affiliation":[{"name":"Academy of Ocean Science and Engineering &amp; College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fuyin","family":"Wang","sequence":"additional","affiliation":[{"name":"Academy of Ocean Science and Engineering &amp; College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong","family":"Luo","sequence":"additional","affiliation":[{"name":"Academy of Ocean Science and Engineering &amp; College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1328-8571","authenticated-orcid":false,"given":"Qi","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Information Science and Engineering, Northeastern University, Shenyang 110819, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuidong","family":"Xiong","sequence":"additional","affiliation":[{"name":"Academy of Ocean Science and Engineering &amp; College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2016,4,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1904","DOI":"10.1109\/LPT.2014.2341662","article-title":"Magnetic Field Sensor Based on Nonadiabatic Tapered Optical Fiber with Magnetic Fluid","volume":"26","author":"Layeghi","year":"2014","journal-title":"IEEE Photonics Technol. 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