A miniaturized tunable optical attenuator with ultrawide bandwidth based on evanescent-field coupling between nanofibers

A miniaturized tunable optical attenuator with ultrawide bandwidth based on evanescent-field coupling between nanofibers | 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 Article A miniaturized tunable optical attenuator with ultrawide bandwidth based on evanescent-field coupling between nanofibers Changjiang Fan, Yunfei Zhang, Jianbin Zhang, Lijun Guo, Mengwei Li, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3838677/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 09 Aug, 2024 Read the published version in Scientific Reports → Version 1 posted 14 You are reading this latest preprint version Abstract We propose a novel miniaturized optical attenuator based on the evanescent-field coupling between two nanofibers. Benefiting from a wavelength-dependent waveguiding property of the coupled structure, a tunable attenuation with maximum extinction ratio of ∼ 20 dB is demonstrated with an ultrawide optical bandwidth up to 0.7 µm in experiment. The wavelength-depended waveguiding properties of both one single nanofiber and coupled nanofibers are investigated in both theory and simulation. Using an adiabatic coupling structure, an attenuation range from -0.16 dB to -18.46 dB is obtained within a spectrum from 1.2 µm-1.7 µm experimentally. Moreover, the simulated results indicate that, the attenuation only shows a slight change of ∼ 0.1 dB with a lateral misalignment of 0.5 µm between the two nanofibers, indicating a high tolerance of this attenuator to the lateral misalignment. Considering the wide bandwidth as well as the ultracompact structure, this attenuator shows high potential in applications such as all-fiber optical sensing and communicating. Physical sciences/Engineering Physical sciences/Optics and photonics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 09 Aug, 2024 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 12 Jun, 2024 Reviews received at journal 12 Jun, 2024 Reviewers agreed at journal 02 Jun, 2024 Reviews received at journal 22 May, 2024 Reviewers agreed at journal 22 May, 2024 Reviews received at journal 06 May, 2024 Reviewers agreed at journal 20 Apr, 2024 Reviewers agreed at journal 18 Apr, 2024 Reviewers agreed at journal 18 Apr, 2024 Reviewers invited by journal 05 Feb, 2024 Editor assigned by journal 05 Feb, 2024 Editor invited by journal 17 Jan, 2024 Submission checks completed at journal 17 Jan, 2024 First submitted to journal 05 Jan, 2024 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. 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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-3838677","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":267803780,"identity":"c1d88a97-6b00-4e56-b934-45c767fc47bf","order_by":0,"name":"Changjiang Fan","email":"","orcid":"","institution":"School of Instrument and Electronics, North University of China","correspondingAuthor":false,"prefix":"","firstName":"Changjiang","middleName":"","lastName":"Fan","suffix":""},{"id":267803781,"identity":"aaa6e14a-d9b3-4c1e-b1a7-80d752e7ee44","order_by":1,"name":"Yunfei Zhang","email":"","orcid":"","institution":"School of Instrument and 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