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Advanced Optics and Photonics Technologies for Sensing Applications

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: 15 December 2024 | Viewed by 1900

Special Issue Editors


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Guest Editor
Center of Physics of the Universities of Minho and Porto, School of Sciences, University of Minho, 4710-057 Braga, Portugal
Interests: optical metrology; image processing; thin films, micro- and nanostructures and systems; optics and science education
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
INESC TEC—Institute for Systems and Computer Engineering, Technology and Science, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
Interests: fiber optic sensors; fiber optic interferometry; interrogation systems; fiber optic lasers; Raman spectroscopy
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
INESC TEC—Institute for Systems and Computer Engineering, Technology and Science, Rua do Campo Alegre 687, 4150-179 Porto, Portugal
Interests: fiber optic sensors; microcavities; Fabry-Perot interferometer; biomedical applications; Raman spectroscopy

Special Issue Information

Dear Colleagues,

The 6th International Conference on the Applications of Optics and Photonics (AOP2024) will be held in Aveiro, Portugal, 16–29 July 2024. Since its first edition in 2011, the AOP conference has provided an excellent opportunity to foster, in an open and friendly environment, the establishment of the widest range of cooperation projects and relationships with colleagues and institutions involved in optics and photonics research worldwide. With this conference open to contributions in all domains of optics and photonics and application fields, we expect to review the state of the art in these subjects and discuss the future directions of research in optics and photonics. Many plenary and keynote lectures by world-renowned researchers in all fields of optics and photonics will set the quality standards of a varied and exciting scientific program.

We are honored to serve as Guest Editors of this Special Issue of Sensors, which will contain a selection of relevant papers submitted and accepted at the AOP2022 conference. Its main scope is to provide a timely and broad collection of the most innovative topics discussed in the latest edition of the conference related to the applications of optics and photonics. We warmly invite researchers to submit their contributions, both original research articles and review papers, to this Special Issue. Topics include but are not limited to the following:

  • Nanophotonics, plasmonics, theoretical optics, and quantum and nonlinear optics;
  • Optical communications and sensors;
  • Optical fibers and applications;
  • Biophotonics and biomedical and medical applications of optics and photonics;
  • Ultrafast lasers, ultrafast optics, and power lasers;
  • Optical metrology, image processing, and industrial applications;
  • Optometry, ophthalmic optics, and color and visual sciences;
  • Optoelectronics;
  • Microwave photonics;
  • Photonics and optical instrumentation for space and astronomy;
  • Optics and photonics for smart mobility and smart cities.

Dr. Manuel Filipe P. C. M. Costa
Dr. Susana Silva
Dr. Susana Novais
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (2 papers)

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Research

20 pages, 4229 KiB  
Article
Comparison of Refractive Index Matching Techniques and PLIF40 Measurements in Annular Flow
by Yago Rivera, Dorian Bascou, David Blanco, Lucas Álvarez-Piñeiro, César Berna, José-Luis Muñoz-Cobo and Alberto Escrivá
Sensors 2024, 24(7), 2317; https://doi.org/10.3390/s24072317 - 05 Apr 2024
Viewed by 356
Abstract
This paper investigates non-invasive techniques for annular two-phase flow analysis, focusing on liquid film characterization to understand the interfacial phenomena that are crucial for heat and mass transfer. Limited methods allow the study of the temporal and spatial evolution of liquid film, such [...] Read more.
This paper investigates non-invasive techniques for annular two-phase flow analysis, focusing on liquid film characterization to understand the interfacial phenomena that are crucial for heat and mass transfer. Limited methods allow the study of the temporal and spatial evolution of liquid film, such as Planar Laser-Induced Fluorescence (PLIF). However, this method possesses optical challenges, leading to the need for improved techniques to mitigate refraction and reflection, such as Refractive Index Matching (RIM). This study utilizes an experimental annular flow facility to analyze both RIM and non-RIM PLIF over a range of liquid Reynolds numbers from 4200 to 10,400. Three configurations—PLIF RIM90, PLIF RIM40, and PLIF nRIM40—are compared from both qualitative and quantitative perspectives. In the quantitative analysis, key variables of the liquid film are measured, namely mean film thickness, disturbance wave height, and frequency. Variations in the analyzed variables indicate minor deviations, which are not likely to be caused by the technique used. However, all three methodologies exhibited errors that are estimated to be within a maximum of 10%, with a mean value of approximately 8%. Full article
(This article belongs to the Special Issue Advanced Optics and Photonics Technologies for Sensing Applications)
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14 pages, 5506 KiB  
Article
Enhanced Sensitivity in Optical Sensors through Self-Image Theory and Graphene Oxide Coating
by Cristina Cunha, Catarina Monteiro, António Vaz, Susana Silva, Orlando Frazão and Susana Novais
Sensors 2024, 24(3), 891; https://doi.org/10.3390/s24030891 - 30 Jan 2024
Viewed by 1096
Abstract
This paper presents an approach to enhancing sensitivity in optical sensors by integrating self-image theory and graphene oxide coating. The sensor is specifically engineered to quantitatively assess glucose concentrations in aqueous solutions that simulate the spectrum of glucose levels typically encountered in human [...] Read more.
This paper presents an approach to enhancing sensitivity in optical sensors by integrating self-image theory and graphene oxide coating. The sensor is specifically engineered to quantitatively assess glucose concentrations in aqueous solutions that simulate the spectrum of glucose levels typically encountered in human saliva. Prior to sensor fabrication, the theoretical self-image points were rigorously validated using Multiphysics COMSOL 6.0 software. Subsequently, the sensor was fabricated to a length corresponding to the second self-image point (29.12 mm) and coated with an 80 µm/mL graphene oxide film using the Layer-by-Layer technique. The sensor characterization in refractive index demonstrated a wavelength sensitivity of 200 ± 6 nm/RIU. Comparative evaluations of uncoated and graphene oxide-coated sensors applied to measure glucose in solutions ranging from 25 to 200 mg/dL showed an eightfold sensitivity improvement with one bilayer of Polyethyleneimine/graphene. The final graphene oxide-based sensor exhibited a sensitivity of 10.403 ± 0.004 pm/(mg/dL) and demonstrated stability with a low standard deviation of 0.46 pm/min and a maximum theoretical resolution of 1.90 mg/dL. Full article
(This article belongs to the Special Issue Advanced Optics and Photonics Technologies for Sensing Applications)
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