{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T16:53:04Z","timestamp":1791132784620,"version":"4.1.0"},"reference-count":41,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T00:00:00Z","timestamp":1791072000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T00:00:00Z","timestamp":1791072000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52322208"],"award-info":[{"award-number":["52322208"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Science"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Ratiometric flexible fluorescent fiber\u2010optic sensors, featuring self\u2010calibration and precise spatial localization, are emerging as a robust platform for in situ thermal monitoring, advancing applications such as battery safety management and biomedical diagnostics. However, measurement artifacts induced by the inherent photothermal effect remain largely overlooked, posing a challenge to high\u2010accuracy temperature sensing. Here, we propose a partial\u2010inner\u2010cladding optical fiber (PICOF) to suppress photothermal artifacts by isolating the sensing layer from the coupling interface and the fiber core, where self\u2010heating predominantly occurs. Compared with conventional fiber structures, the PICOF extends the allowable excitation power from \u2264 15 to 61\u00a0mW and improves the luminescence signal\u2010to\u2010noise ratio from 36.6 to 42\u00a0dB, enabling high\u2010fidelity readout with a relative standard deviation below 0.09% even under power fluctuations and deformation disturbances. Consequently, the LuVO\n                    <jats:sub>4<\/jats:sub>\n                    :25%Yb\n                    <jats:sup>3+<\/jats:sup>\n                    \/Er\n                    <jats:sup>3+<\/jats:sup>\n                    \u2010composite PICOF achieves record\u2010high accuracy (maximum absolute error\n                    <jats:italic>\u03b4<\/jats:italic>\n                    <jats:sub>max<\/jats:sub>\n                    = 0.104\u00b0C), precision (standard deviation\n                    <jats:italic>\u03c3<\/jats:italic>\n                    = 0.05\u00b0C), and temperature resolution (\n                    <jats:italic>T<\/jats:italic>\n                    <jats:sub>R<\/jats:sub>\n                    = 0.2\u00b0C) among reported fluorescent fiber\u2010optic sensors. Furthermore, practical demonstrations underscore its utility for early warning of thermal hazards and incipient failure in sodium\u2010ion batteries, and as an in situ diagnostic reference for the B\u00e1r\u00e1ny caloric test. This work provides an effective and generalizable strategy for the advancement of high\u2010accuracy fluorescent thermometry.\n                  <\/jats:p>","DOI":"10.1002\/advs.78130","type":"journal-article","created":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T16:28:32Z","timestamp":1791131312000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Suppressing Photothermal Artifacts in Flexible Fluorescent Fiber\u2010Optic Sensors for Accurate and Precise In Situ Temperature Monitoring"],"prefix":"10.1002","author":[{"given":"Sijie","family":"Su","sequence":"first","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinjian","family":"Yu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pengyuan","family":"Dong","sequence":"additional","affiliation":[{"name":"Guangdong Energy Group Science and Technology Research Institute Co., Ltd.  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Lyu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9842-0510","authenticated-orcid":false,"given":"Jiulin","family":"Gan","sequence":"additional","affiliation":[{"name":"School of Materials and Engineering Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices South China University of Technology  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1666-0532","authenticated-orcid":false,"given":"Enhai","family":"Song","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology  Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6544-4735","authenticated-orcid":false,"given":"Qinyuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology  Guangzhou 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