10-year back file (where available). Shown in Fig. You will only need to do this once. The results of this work suggest that such a simple optical fiber sensor can be used for detection of liquid–solid phase changes in other materials with similar to n-octadecane thermo-optic properties. Resultant Transmission losses (on the order of 4% per interface) can be virtually eliminated by use of anti-reflection coatings or index matching material. Wei Han1, Marek Rebow2, Dejun Liu1, Gerald Farrell1, Yuliya Semenova1 and Qiang Wu3, Published 16 November 2018 • The sensor probe consists of a single-mode fiber with a cleaved end which is immersed in the material sample under test. Since the RI of n-octadecane during its phase transition changes discontinuously, inflection in the reflected light power ratio dependence indicates the phase change of the sample in the vicinity of the sensor probe. The sensor probe consists of a single-mode fiber with a cleaved end which is immersed in the material sample under test. Resultant Transmission losses (on the order of 4% per interface) can be For some fiber lasers, the Fresnel reflection … Please choose one of the options below. having different refractive indices. The time coefficients of the curing process are estimated and explained explicitly. Export citation and abstract The proposed cure monitoring sensor has a reliable and concise structure. The computer you are using is not registered by an institution with a subscription to this article. Copyright © 2020 Elsevier B.V. or its licensors or contributors. To measure the refractive index, an optical fiber sensor based on relative Fresnel-reflection ratio is developed. Find out more about journal subscriptions at your site. To gain access to this content, please complete the Recommendation Fresnel reflection occurs at the air-glass interfaces at entrance and 2. A fiber-optic relative sensor for real-time UV cure monitoring is presented. Technol. Screened for originality? 29 125107. The reflectivity can vanish due to destructive interference (e.g. virtually eliminated by use of anti-reflection coatings or index matching material. 1. The reflection that Fresnel reflections are essential for the operation principle of birefringent tuners. ( 188) Note 1: Fresnel reflection occurs at the air- glass interfaces at the entrance and exit ends of an optical fiber. We use cookies to help provide and enhance our service and tailor content and ads. Tualatin, OR 97062, Harsh Environment & Defense Cable Assemblies, Stainless Steel Fiber Optic Cable Assemblies, Stainless Steel Polarization Maintaining Cables, MIL-DTL-83526/20 & MIL-DTL-83526/21 Expanded Beam Connectors, MTP® / MPO Fiber Optic Cables & Breakouts, Multi-Fiber Distribution Cable Assemblies, Mode Conditioning Fiber Optic Cable Assemblies, Glass Processing Solutions: Shaped and Fused Fiber, Fresnel Reflection on The Free Dictionary. Fresnel reflection occurs at the air-glass interfaces at entrance and exit ends of an optical fiber. Accepted 23 October 2018 © 2018 IOP Publishing Ltd https://doi.org/10.1016/j.optcom.2020.126099. Sci. Fresnel reflection: In optics, the reflection of a portion of incident light at a discrete interface between two media having different refractive indices. Fresnel Reflection - EXFO animated glossary of Fiber Optics exit ends of an optical fiber. The dashed line shows the reflectivity of a single fiber–air interface. In 1815, the dependence of the polarizing angle on the refractive index was determined experimentally by David Brewster. 1. Its operational principle is based on the density-dependent variation on the refractive index of materials along with the Fresnel reflections from the interface between the fiber end and UV adhesive. You do not need to reset your password if you login via Athens or an Institutional login. Revisions: 1 This site uses cookies. © 2020 Elsevier B.V. All rights reserved. As the n-octadecane changes from solid to liquid or from liquid to solid, its refractive index (RI) changes resulting in changes of the light power ratio reflected by the probe. Reflection of a portion of the Light incident on a planar Interface between two homogeneous media having different refractive indices. He later coined the term polarization to describe this behavior. The experimental data of refractive indices are measured during the curing processes under different UV intensities, which can be fit with two-term exponential equations. management contact at your company. Reflection of a portion of the Light incident on a planar Interface between two homogeneous media As observed, it shows less time consumption with higher UV intensity. Measurement Science and Technology, Yes, Wei Han et al 2018 Meas. Published 16 November 2018, Method: Single-blind Both the experimental and theoretical analyses are investigated in detail. Institutional subscribers have access to the current volume, plus a In 1808, Étienne-Louis Malus discovered that when a ray of light was reflected off a non-metallic surface at the appropriate angle, it behaved like one of the two rays emerging from a doubly-refractive calcite crystal. To find out more, see our, Browse more than 100 science journal titles, Read the very best research published in IOP journals, Read open access proceedings from science conferences worldwide. 20245 SW 95th Avenue An all optical fiber Fresnel reflection sensor for detecting the solid–liquid phase change in n-octadecane is proposed and experimentally demonstrated. For corporate researchers we can also follow up directly with your R&D manager, or the information ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Fresnel-reflection-based fiber sensor for UV adhesive cure monitoring. But the reason for that dependence was such a deep mystery that in late 1817, Thomas Young was moved to write: RIS. By continuing you agree to the use of cookies. occurs at the planar Junction of two materials having different refractive indices. If you have a user account, you will need to reset your password the next time you login. Find out more. © 1997–2020 Timbercon, Inc. Figure 1: Effective reflectivity at an air gap between two optical fibers vs. gap width. BibTeX An all optical fiber Fresnel reflection sensor for detecting the solidliquid phase change in – n-octadecane is proposed and experimentally demonstrated. Volume 29, for close to zero width) or get enhanced by constructive interference. Fresnel reflection is not a function of the angle of incidence. By continuing to use this site you agree to our use of cookies. Form and we will follow up with your librarian or Institution on your behalf. Resultant transmission losses, on the order of 4% per interface, can be reduced considerably by the use of index-matching materials. Purchase this article from our trusted document delivery partners. Number 12, 1 Photonics Research Centre, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland, 2 College of Engineering and Built environment, Dublin Institute of Technology, Bolton Street, Dublin 1, Ireland, 3 Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle Upon Tyne, NE1 8ST, United Kingdom, Wei Han https://orcid.org/0000-0002-6675-4775, Qiang Wu https://orcid.org/0000-0002-2901-7434, Received 19 June 2018

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