{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,9]],"date-time":"2024-08-09T16:30:06Z","timestamp":1723221006594},"reference-count":29,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2022,4,15]],"date-time":"2022-04-15T00:00:00Z","timestamp":1649980800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Special projects in key fields of colleges and universities in Guangdong Province","award":["2020ZDZX3035","2020ZDZX3037","NTF19023","NTF18016","2020LKSFG01B","2020LKSFG14B","2021B1515140029"]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"In the paper based on surface plasmon resonance (SPR) in a tilted fiber Bragg grating (TFBG), a novel algorithm is proposed, which facilitates demodulation of surrounding refractive index (SRI) via cladding mode interrogation and accelerates calibration and measurement of SRI. Refractive indices with a tiny index step of 2.2 \u00d7 10\u22125 are prepared by the dilution of glucose aqueous solution for the test and the calibration of this fiber sensor probe. To accelerate the calibration process, automatic selection of the most sensitive cladding mode is demonstrated. First, peaks of transmitted spectrum are identified and numbered. Then, sensitivities of several potentially sensitive cladding modes in amplitude adjacent to the left of the SPR area are calculated and compared. After that, we focus on the amplitudes of the cladding modes as a function of a SRI, and the highest sensitivity of \u22126887 dB\/RIU (refractive index unit) is obtained with a scanning time of 15.77 s in the range from 1520 nm to 1620 nm. To accelerate the scanning speed of the optical spectrum analyzer (OSA), the wavelength resolution is reduced from 0.028 nm to 0.07 nm, 0.14 nm, and 0.28 nm, and consequently the scanning time is shortened to 6.31 s, 3.15 s, and 1.58 s, respectively. However, compared to 0.028 nm, the SRI sensitivity for 0.07 nm, 0.14 nm, and 0.28 nm is reduced to \u22125685 dB\/RIU (17.5% less), \u22125415 dB\/RIU (21.4% less), and \u22124359 dB\/RIU (36.7% less), respectively. Thanks to the calculation of parabolic equation and weighted Gauss fitting based on the original data, the sensitivity is improved to \u22126332 dB\/RIU and \u22126721 dB\/RIU, respectively, for 0.07 nm, and the sensitivity is increased to \u22125850 dB\/RIU and \u22126228 dB\/RIU, respectively, for 0.14 nm.<\/jats:p>","DOI":"10.3390\/s22083032","type":"journal-article","created":{"date-parts":[[2022,4,19]],"date-time":"2022-04-19T06:39:31Z","timestamp":1650350371000},"page":"3032","source":"Crossref","is-referenced-by-count":9,"title":["Cladding Mode Fitting-Assisted Automatic Refractive Index Demodulation Optical Fiber Sensor Probe Based on Tilted Fiber Bragg Grating and SPR"],"prefix":"10.3390","volume":"22","author":[{"given":"Wenwei","family":"Lin","sequence":"first","affiliation":[{"name":"Research Center for Advanced Optics and Photoelectronics, Department of Physics, College of Science, Shantou University, Shantou 515063, China"},{"name":"Key Laboratory of Intelligent Manufacturing Technology of MOE, Shantou University, Shantou 515063, China"}]},{"given":"Weiying","family":"Huang","sequence":"additional","affiliation":[{"name":"Guangdong Provincial Key Laboratory of Digital, Signal and Image Processing, Department of Electronic and Information Engineering, College of Engineering, Shantou University, Shantou 515063, China"}]},{"given":"Yingying","family":"Liu","sequence":"additional","affiliation":[{"name":"Research Center for Advanced Optics and Photoelectronics, Department of Physics, College of Science, Shantou University, Shantou 515063, China"},{"name":"Key Laboratory of Intelligent Manufacturing Technology of MOE, Shantou University, Shantou 515063, China"}]},{"ORCID":"http:\/\/orcid.org\/0000-0002-7431-3734","authenticated-orcid":false,"given":"Xiaoyong","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan 523808, China"}]},{"given":"Hang","family":"Qu","sequence":"additional","affiliation":[{"name":"Research Center for Advanced Optics and Photoelectronics, Department of Physics, College of Science, Shantou University, Shantou 515063, China"},{"name":"Key Laboratory of Intelligent Manufacturing Technology of MOE, Shantou University, Shantou 515063, China"}]},{"ORCID":"http:\/\/orcid.org\/0000-0003-0239-6144","authenticated-orcid":false,"given":"Xuehao","family":"Hu","sequence":"additional","affiliation":[{"name":"Research Center for Advanced Optics and Photoelectronics, Department of Physics, College of Science, Shantou University, Shantou 515063, China"},{"name":"Key Laboratory of Intelligent Manufacturing Technology of MOE, Shantou University, Shantou 515063, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/j.trac.2020.115892","article-title":"Recent advances in fiber-optic evanescent wave sensors for monitoring organic and inorganic pollutants in water","volume":"127","author":"Jiao","year":"2020","journal-title":"Trends Anal. 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