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The FPI is fabricated by simple and cost-effective techniques, including fiber cleaving, splicing, and tapering. Due to the ultra-long cantilever beam with an effective length of 2.33 mm and the ultra-short Fabry\u2013P\u00e9rot (FP) cavity with an actual length of 13.98 \u03bcm, the sensor exhibits an ultra-high strain sensitivity of 544.57 pm\/\u03bc\u03b5 in experimental results. The sensor boasts a small temperature sensitivity of 1.02 pm\/\u00b0C and a cross-temperature sensitivity of 0.0019 \u00b5\u03b5\/\u00b0C in the temperature range of 25\u2013200 \u00b0C. Furthermore, the sensor has good stability and repeatability. Owing to the symmetry-enhanced design, simple fabrication process, high strain sensitivity, as well as a stable, linearly proportional response over an extensive strain regime, the device has large potential in various sensing applications.<\/jats:p>","DOI":"10.3390\/sym17081284","type":"journal-article","created":{"date-parts":[[2025,8,11]],"date-time":"2025-08-11T08:10:32Z","timestamp":1754899832000},"page":"1284","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Symmetric Taper Fiber Cleaving for Centered Waist-Inserted FPI: Temperature-Compensated High-Sensitivity Strain Sensor"],"prefix":"10.3390","volume":"17","author":[{"given":"Xuntao","family":"Yu","sequence":"first","affiliation":[{"name":"School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weijie","family":"Kong","sequence":"additional","affiliation":[{"name":"School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yunfeng","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongqi","family":"Yuan","sequence":"additional","affiliation":[{"name":"School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jingwei","family":"Lv","sequence":"additional","affiliation":[{"name":"School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chao","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miao","family":"Liu","sequence":"additional","affiliation":[{"name":"Qinhuangdao Campus, Northeast Petroleum University, Qinhuangdao 066044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5581-4883","authenticated-orcid":false,"given":"Paul K.","family":"Chu","sequence":"additional","affiliation":[{"name":"Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,8,10]]},"reference":[{"key":"ref_1","first-page":"9196","article-title":"Vernier Effect-Based Strain Sensor with Cascaded Fabry-Perot Interferometers","volume":"20","author":"Lashari","year":"2020","journal-title":"IEEE Sens. 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