Advanced Optical Fiber LSPR Sensor for High-Sensitivity Salinity Detection: Theoretical and Experimental Insights

Advanced Optical Fiber LSPR Sensor for High-Sensitivity Salinity Detection: Theoretical and Experimental Insights | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Advanced Optical Fiber LSPR Sensor for High-Sensitivity Salinity Detection: Theoretical and Experimental Insights Mohammed S. Sada, Mohammed Salim Jasim AL-Taie, Ahmed M. Hameed, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8310996/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 11 You are reading this latest preprint version Abstract A reflective salinity sensor based on the Localized Surface Plasmon Resonance (LSPR) effect with a no-core fiber (NCF) structure has been simulated and designed. First, the sensing mechanism of the optical fiber SPR sensor was analyzed. Next, the influence of the metal type, the thickness of the metal film, and the length of the sensing area on the SPR spectrum were simulated and compared. Based on the simulation results, the sensor was designed and experimentally implemented to achieve optimal performance. Experimental results demonstrate that the sensor achieves a sensitivity of 1.939 nm% within a concentration range of 0% to 25%. Additionally, it surpasses previous systems in terms of performance, mechanical durability, and repeatability. As a result, the reflective SPR fiber-based salinity sensor holds significant potential for future applications in environmental monitoring and ensuring the safety of drinking water. Localized Surface Plasmon Resonance Optical Fiber No-core Fiber Sensor salinity Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 08 May, 2026 Reviews received at journal 07 May, 2026 Reviewers agreed at journal 06 May, 2026 Reviewers agreed at journal 05 May, 2026 Reviews received at journal 24 Jan, 2026 Reviewers agreed at journal 20 Jan, 2026 Reviewers agreed at journal 17 Jan, 2026 Reviewers invited by journal 16 Jan, 2026 Editor assigned by journal 10 Dec, 2025 Submission checks completed at journal 10 Dec, 2025 First submitted to journal 08 Dec, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8310996","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":576009349,"identity":"6e93dfe9-f6e4-4342-8e04-b71e2673a213","order_by":0,"name":"Mohammed S. 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