{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T20:10:21Z","timestamp":1783714221265,"version":"3.55.0"},"reference-count":29,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2022,8,7]],"date-time":"2022-08-07T00:00:00Z","timestamp":1659830400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["61805191"],"award-info":[{"award-number":["61805191"]}]},{"name":"National Natural Science Foundation of China","award":["202000190U1002"],"award-info":[{"award-number":["202000190U1002"]}]},{"name":"National Natural Science Foundation of China","award":["2021JM-438"],"award-info":[{"award-number":["2021JM-438"]}]},{"name":"National Natural Science Foundation of China","award":["2021JQ-653"],"award-info":[{"award-number":["2021JQ-653"]}]},{"name":"National Natural Science Foundation of China","award":["SKLLIM2007"],"award-info":[{"award-number":["SKLLIM2007"]}]},{"DOI":"10.13039\/501100001809","name":"Aviation Science Foundation of China","doi-asserted-by":"publisher","award":["61805191"],"award-info":[{"award-number":["61805191"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"Aviation Science Foundation of China","doi-asserted-by":"publisher","award":["202000190U1002"],"award-info":[{"award-number":["202000190U1002"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"Aviation Science Foundation of China","doi-asserted-by":"publisher","award":["2021JM-438"],"award-info":[{"award-number":["2021JM-438"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"Aviation Science Foundation of China","doi-asserted-by":"publisher","award":["2021JQ-653"],"award-info":[{"award-number":["2021JQ-653"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"Aviation Science Foundation of China","doi-asserted-by":"publisher","award":["SKLLIM2007"],"award-info":[{"award-number":["SKLLIM2007"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Natural Science Basic Research Plan in Shaanxi Province of China","award":["61805191"],"award-info":[{"award-number":["61805191"]}]},{"name":"Natural Science Basic Research Plan in Shaanxi Province of China","award":["202000190U1002"],"award-info":[{"award-number":["202000190U1002"]}]},{"name":"Natural Science Basic Research Plan in Shaanxi Province of China","award":["2021JM-438"],"award-info":[{"award-number":["2021JM-438"]}]},{"name":"Natural Science Basic Research Plan in Shaanxi Province of China","award":["2021JQ-653"],"award-info":[{"award-number":["2021JQ-653"]}]},{"name":"Natural Science Basic Research Plan in Shaanxi Province of China","award":["SKLLIM2007"],"award-info":[{"award-number":["SKLLIM2007"]}]},{"name":"Foundation of State Key Laboratory of Laser Interaction with Matter","award":["61805191"],"award-info":[{"award-number":["61805191"]}]},{"name":"Foundation of State Key Laboratory of Laser Interaction with Matter","award":["202000190U1002"],"award-info":[{"award-number":["202000190U1002"]}]},{"name":"Foundation of State Key Laboratory of Laser Interaction with Matter","award":["2021JM-438"],"award-info":[{"award-number":["2021JM-438"]}]},{"name":"Foundation of State Key Laboratory of Laser Interaction with Matter","award":["2021JQ-653"],"award-info":[{"award-number":["2021JQ-653"]}]},{"name":"Foundation of State Key Laboratory of Laser Interaction with Matter","award":["SKLLIM2007"],"award-info":[{"award-number":["SKLLIM2007"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A high-precision cross-correlation cavity length demodulation method for fiber-optic Fabry\u2013Perot (F\u2013P) sensors based on two different wavelength superluminescent diodes (SLDs) was proposed. This method can solve the problem of low demodulation accuracy caused by the difficulty in identifying the maximum cross-correlation coefficient when the cavity length of the fiber-optic F\u2013P fiber sensor is too short, or when the spectral bandwidth of the illuminating single-light source is too narrow. This demodulation method is based on the principle that the two main peaks of the two cross-correlation curves corresponding to two different spectral ranges should match, and the average value of the two calculated cavity lengths corresponding to the two matched peaks is determined as the real cavity length. The cavity length demodulation of fiber-optic F\u2013P sensors in the range of 20\u2013200 \u03bcm shows a maximum measurement deviation of 0.008 \u03bcm, which is significantly smaller than the demodulation result obtained with a single light source, and the standard deviation of the measurement results is only approximately 0.0005 \u03bcm, indicating the high precision and stability of a dual SLD cross-correlation demodulation method.<\/jats:p>","DOI":"10.3390\/s22155898","type":"journal-article","created":{"date-parts":[[2022,8,9]],"date-time":"2022-08-09T04:16:55Z","timestamp":1660018615000},"page":"5898","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["High-Precision Cavity Length Demodulation Method for Fiber-Optic Fabry\u2013Perot Sensors Based on Dual Superluminescent Diodes"],"prefix":"10.3390","volume":"22","author":[{"given":"Weiguang","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jia","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiongxing","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2978-7359","authenticated-orcid":false,"given":"Haibin","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Junying","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8501-8036","authenticated-orcid":false,"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1016\/j.yofte.2006.03.004","article-title":"Recent progress in fiber-optic extrinsic Fabry\u2013Perot interferometric sensors","volume":"12","author":"Rao","year":"2006","journal-title":"Opt. 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