{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T03:02:25Z","timestamp":1760151745308,"version":"build-2065373602"},"reference-count":24,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2022,4,14]],"date-time":"2022-04-14T00:00:00Z","timestamp":1649894400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002858","name":"China Postdoctoral Science Foundation","doi-asserted-by":"publisher","award":["2021M691742"],"award-info":[{"award-number":["2021M691742"]}],"id":[{"id":"10.13039\/501100002858","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62105278"],"award-info":[{"award-number":["62105278"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"publisher","award":["ZR2021QF139"],"award-info":[{"award-number":["ZR2021QF139"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A high-resolution and high-sensitivity fiber optic sensor based on the quasi-linear distribution of the core refractive index is designed and fabricated, which enables decouple measurement of bending and of temperature. First, single-mode fiber doped with Al2O3, Y2O3, and P2O5 was drawn through a fiber drawing tower. The fiber grating was engraved on the fiber by a femtosecond laser. Modeling analysis was conducted from quantum theory. Experimental results show that the bending sensitivity of the grating can reach 21.85 dB\/m\u22121, which is larger than the reported sensitivity of similar sensors. In the high temperature range from room temperature to 1000 \u00b0C, the temperature sensitivity was 14.1 pm\/\u00b0C. The doped grating sensor can achieve high temperature measurement without annealing, and it has a distinguished linear response from low temperature to high temperature. The bending resolution can reach 0.0004 m\u22121, and the temperature resolution can reach 0.007 \u00b0C. Two-parameter decoupling measurement can be realized according to the distinctive characteristic trends of the spectrum. What\u2019s more, the sensor exhibits excellent stability and a fast response time.<\/jats:p>","DOI":"10.3390\/s22083007","type":"journal-article","created":{"date-parts":[[2022,4,19]],"date-time":"2022-04-19T02:39:31Z","timestamp":1650335971000},"page":"3007","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["An Ultra-High-Resolution Bending Temperature Decoupled Measurement Sensor Based on a Novel Core Refractive Index-like Linear Distribution Doped Fiber"],"prefix":"10.3390","volume":"22","author":[{"given":"Yunshan","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Aerospace Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yulin","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Aerospace Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiafen","family":"Hu","sequence":"additional","affiliation":[{"name":"System Design Institute of Hubei Aerospace Technology Academy, Wuhan 430040, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dan","family":"Wu","sequence":"additional","affiliation":[{"name":"System Design Institute of Hubei Aerospace Technology Academy, Wuhan 430040, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Fan","sequence":"additional","affiliation":[{"name":"Beijing Tianji Space Technology Co., Ltd., Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhaokui","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Aerospace Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Linxing","family":"Kong","sequence":"additional","affiliation":[{"name":"School of Opto-Electronic Information Science and Technology, Yantai University, Yantai 264005, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"26461","DOI":"10.1364\/OE.398794","article-title":"Selective fiber Bragg grating inscription in four-core fiber for two-dimension vector bending sensing","volume":"28","author":"Bao","year":"2020","journal-title":"Opt. 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