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Fibers
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Optical Fibers Sensors 2019
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Optical Fibers Sensors 2019

A special issue of Fibers (ISSN 2079-6439).

Deadline for manuscript submissions: closed (30 September 2019) | Viewed by 20786

Special Issue Editor

Dr. Paulo Caldas

E-Mail Website
Guest Editor
1. School of Technology and Management, Polytechnic Institute of Viana do Castelo, 4900-348 Viana do Castelo, Portugal
2. Centre for Applied Photonics (CAP), Institute for Systems and Computer Engineering, Technology and Science – INESC TEC, 4150-179 Porto, Portugal
Interests: long-period gratings; optical fibers; optical fiber sensors; interferometers; whispering gallery modes; microresonators; optical fiber communications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Sensors based on optical technology and in particular those based on optical fibers have been gaining importance in recent years, not only for measuring physical parameters but also biochemical parameters. The reasons for this are manifold: immunity to electromagnetic interference, small size, robustness, potential remote operation, potential intrinsic multiplexing, high sensitivity and great versatility associated with the large number of independent parameters that characterize the radiation, as is the case for intensity, wavelength, frequency, phase and polarization, all of which are potentially sensitive to physical, chemical and biological measurands. These characteristics led to the application of this technology to the fields of physical, chemical and biochemical measurement, often at a competitive cost and with an increased level of performance.

In this Special Issue, dedicated to optical fibers sensors, original research papers, as well as reviews, are welcome. The goal is to gather contributions on various aspects related to optical fiber sensors, namely new types of optical fibers, optical sources, devices in optical fibers (FBG, LPG, interferometers, etc.) and applications.

I hope that this Special Issue will provide to the scientific community with a thorough overview of the current research on optical fibers sensors.

Dr. Paulo Caldas
Guest Editor

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. Fibers is an international peer-reviewed open access monthly 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 2000 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.

Keywords

  • Optical fibers
  • Sensors
  • Optical Sources
  • Bragg Grating
  • Long Period Grating
  • Interferometers

Published Papers (3 papers)

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Research

7 pages, 3161 KiB  
Article
Fiber Microsphere Coupled in a Taper for a Large Curvature Range
by Paulo Robalinho and Orlando Frazão
Fibers 2019, 7(10), 87; https://doi.org/10.3390/fib7100087 - 09 Oct 2019
Cited by 1 | Viewed by 4206
Abstract
This work consists of using an optical fiber microsphere as a sensor for a wide range of curvature radii. The microsphere was manufactured in a standard fiber with an electric arc. In order to maximize system efficiency, the microsphere was spliced in the [...] Read more.
This work consists of using an optical fiber microsphere as a sensor for a wide range of curvature radii. The microsphere was manufactured in a standard fiber with an electric arc. In order to maximize system efficiency, the microsphere was spliced in the center of a taper. This work revealed that the variations of the wavelength where the maxima and minima of the spectrum are located varies linearly with the curvature of the system with a maximum sensitive of 580 ± 20 (pm km). This is because the direction of the input beam in the microsphere depends on the system curvature, giving rise to interferometric variations within the microsphere. Full article
(This article belongs to the Special Issue Optical Fibers Sensors 2019)
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7 pages, 2441 KiB  
Article
A Novel Approach to Realizing Low-Cost Plasmonic Optical Fiber Sensors: Light-Diffusing Fibers Covered by Thin Metal Films
by Nunzio Cennamo, Luigi Zeni, Francesco Arcadio, Ester Catalano and Aldo Minardo
Fibers 2019, 7(4), 34; https://doi.org/10.3390/fib7040034 - 17 Apr 2019
Cited by 13 | Viewed by 4911
Abstract
We have investigated, in a numerical and experimental way, a refractive index (RI) sensor based on surface plasmon resonance (SPR) in a silver-coated light-diffusing fiber (LDF). The experimental tests were conducted using water-glycerine mixtures with refractive indices ranging from 1.332 to 1.388. In [...] Read more.
We have investigated, in a numerical and experimental way, a refractive index (RI) sensor based on surface plasmon resonance (SPR) in a silver-coated light-diffusing fiber (LDF). The experimental tests were conducted using water-glycerine mixtures with refractive indices ranging from 1.332 to 1.388. In the considered refractive index range, the experimental results show a sensitivity of the SPR wavelength to the outer medium’s RI ranging from ~2600 to ~4700 nm/RIU, which is larger than the sensitivity recently reported for a gold-coated LDF sensor (~1200 to ~4000 nm/RIU). The silver-coated sensor is also shown to ensure a higher signal-to-noise ratio (SNR) compared to the gold-coated sensor. Full article
(This article belongs to the Special Issue Optical Fibers Sensors 2019)
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12 pages, 8431 KiB  
Article
Design and Performance Analysis of the WDM Schemes for Radio over Fiber System With Different Fiber Propagation Losses
by Adnan Hussein Ali and Alaa Desher Farhood
Fibers 2019, 7(3), 19; https://doi.org/10.3390/fib7030019 - 26 Feb 2019
Cited by 49 | Viewed by 11121
Abstract
The integration of optical and wireless networks increases mobility and capacity and decreases costs in access networks. Fibre optic communication can be considered optical communication that combines the methodologies of two communications, and it may be utilised in systems of wired and wireless [...] Read more.
The integration of optical and wireless networks increases mobility and capacity and decreases costs in access networks. Fibre optic communication can be considered optical communication that combines the methodologies of two communications, and it may be utilised in systems of wired and wireless communication. The solution for many problems is radio over fibre (RoF) because it can control many base stations (BS) that are connected to a central station (CS) with an optical fibre. The received RoF signal head for in a low quality; thus, many factors will result in some problems such as a high bit error rate (BER) and low Q-factor values, and the receiver might not be operating in a high data rate network. Wavelength division multiplexing (WDM) network can offer a solution to these problems where the transmission of different signals can be done with a single-mode fibre. BER should be reduced to assured values, and the Q-factor must be increased. The investigation of WDM-RoF with different lengths of fibre at various channel spacing will be simulated using Optisystem software, and the RoF’s receiver performance is measured and analyzed depending on the acquired BER, the value of the Q-factor, and the height of the opening of the eye diagram. The degradation factors effect such as attenuation and dispersion are significantly limited with the addition of an EDFA amplifier to a Single Mode Fibre (SMF). Full article
(This article belongs to the Special Issue Optical Fibers Sensors 2019)
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