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Applied Sciences
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Silica-Based Optical Fibers Technologies
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Silica-Based Optical Fibers Technologies

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6664

Special Issue Editor

Dr. Antonino Alessi

E-Mail Website
Guest Editor
Laboratoire des Solides irradiés, CEA/DRF/IRAMIS, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91128 Palaiseau, France
Interests: optical fibers; radiation–matter interactions; glasses; point defects; magnetic and optical properties; nano-systems; material characterization

Special Issue Information

Dear Colleagues,

In recent decades, we have witnessed the growing use of optical fibers in many fields of applied sciences. Such increasing use is related to the great availability of raw materials; the physical properties of silica; the large adjustability of fiber features during manufacturing; the enormous number of employable dopants and their possible micro-structuration; and to all the additional functionalizations obtained by post-production treatments, their small dimensions and light-guiding properties, as well as their possible combination with other materials. Considering optical fibers´ impact on modern technology, it is a pleasure to present a Special Issue devoted to the state of art of silica-based optical fibers.

The aims of this Special Issue include the following:

  • To collect the experiences and expertise of researchers of different fields;
  • To provide a broad overview of the current topics in the applicative domain;
  • To deeply consider basic research and its impacts on applications;
  • To discuss modern experiences that have presented new opportunities.

Since one of our main targets is to give to the readers an overview of the hot topics and the state of the art of this interdisciplinary theme, both experimental and the theoretical manuscripts, even in review form, are welcome.

Dr. Antonino Alessi
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. Applied Sciences 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 2400 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 properties
  • Manufacturing
  • Sensors
  • Radiation effects
  • Telecommunication
  • Laser and amplifier
  • Basic mechanism simulation
  • Silica
  • Point defects
  • Laser inscription
  • Waveguide
  • Characterization techniques
  • Nano-fibers
  • Composite devices
  • Networks
  • Market

Published Papers (3 papers)

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Research

13 pages, 3357 KiB  
Article
O2 Loaded Germanosilicate Optical Fibers: Experimental In Situ Investigation and Ab Initio Simulation Study of GLPC Evolution under Irradiation
by Imene Reghioua, Luigi Giacomazzi, Antonino Alessi, Blaz Winkler, Layla Martin-Samos, Sylvain Girard, Diego Di Francesca, Mattia Fanetti, Nicolas Richard, Philippe Paillet, Melanie Raine, Simonpietro Agnello, Matjaz Valant, Aziz Boukenter and Youcef Ouerdane
Appl. Sci. 2022, 12(8), 3916; https://0-doi-org.brum.beds.ac.uk/10.3390/app12083916 - 13 Apr 2022
Viewed by 1286
Abstract
In this work we present a combined experimental and ab initio simulation investigation concerning the Germanium Lone Pair Center (GLPC), its interaction with molecular oxygen (O2), and evolution under irradiation. First, O2 loading has been applied here to Ge-doped optical [...] Read more.
In this work we present a combined experimental and ab initio simulation investigation concerning the Germanium Lone Pair Center (GLPC), its interaction with molecular oxygen (O2), and evolution under irradiation. First, O2 loading has been applied here to Ge-doped optical fibers to reduce the concentration of GLPC point defects. Next, by means of cathodoluminescence in situ experiments, we found evidence that the 10 keV electron irradiation of the treated optical fibers induces the generation of GLPC centers, while in nonloaded optical fibers, the irradiation causes the bleaching of the pre-existing GLPC. Ab initio calculations were performed to investigate the reaction of the GLPC with molecular oxygen. Such investigations suggested the stability of the dioxagermirane (DIOG) bulk defect, and its back conversion into GLPC with a local release of O2 under irradiation. Furthermore, it is also inferred that a remarkable portion of the O2 passivated GLPC may form Ge tetrahedra connected to peroxy bridges. Such structures may have a larger resistance to the irradiation and not be back converted into GLPC. Full article
(This article belongs to the Special Issue Silica-Based Optical Fibers Technologies)
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14 pages, 3088 KiB  
Article
Radiation Effects on Pure-Silica Multimode Optical Fibers in the Visible and Near-Infrared Domains: Influence of OH Groups
by Cosimo Campanella, Vincenzo De Michele, Adriana Morana, Gilles Mélin, Thierry Robin, Emmanuel Marin, Youcef Ouerdane, Aziz Boukenter and Sylvain Girard
Appl. Sci. 2021, 11(7), 2991; https://0-doi-org.brum.beds.ac.uk/10.3390/app11072991 - 26 Mar 2021
Cited by 10 | Viewed by 2272
Abstract
Signal transmission over optical fibers in the ultraviolet to near-infrared domains remains very challenging due to their high intrinsic losses. In radiation-rich environments, this is made even more difficult due to the radiation-induced attenuation (RIA) phenomenon. We investigated here how the number of [...] Read more.
Signal transmission over optical fibers in the ultraviolet to near-infrared domains remains very challenging due to their high intrinsic losses. In radiation-rich environments, this is made even more difficult due to the radiation-induced attenuation (RIA) phenomenon. We investigated here how the number of hydroxyl groups (OH) present in multi-mode (MM) pure-silica core (PSC) optical fibers influences the RIA levels and kinetics. For this, we tested three different fiber samples: one “wet”, one “dry” and one with an intermediate “medium” OH content. The RIA of the three samples was measured in the 400–900 nm (~3 eV to ~1.4 eV) spectral range during and after an X-ray irradiation at a dose rate of 6 Gy(SiO2) s−1 up to a total accumulated dose of 300 kGy(SiO2). Furthermore, we evaluated the H2-pre-loading efficiency in the medium OH sample to permanently improve both its intrinsic losses and radiation response in the visible domain. Finally, the spectral decomposition of the various RIA responses allows us to better understand the basic mechanisms related to the point defects causing the excess of optical losses. Particularly, it reveals the relationship between the initial OH groups content and the generation of non-bridging oxygen hole centers (NBOHCs). Moreover, the presence of hydroxyl groups also affects the contribution from other intrinsic defects such as the self-trapped holes (STHs) to the RIA in this spectral domain. Full article
(This article belongs to the Special Issue Silica-Based Optical Fibers Technologies)
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11 pages, 2817 KiB  
Article
Thermal Stability of Type II Modifications Inscribed by Femtosecond Laser in a Fiber Drawn from a 3D Printed Preform
by Yitao Wang, Shuen Wei, Maxime Cavillon, Benjamin Sapaly, Bertrand Poumellec, Gang-Ding Peng, John Canning and Matthieu Lancry
Appl. Sci. 2021, 11(2), 600; https://0-doi-org.brum.beds.ac.uk/10.3390/app11020600 - 09 Jan 2021
Cited by 5 | Viewed by 2294
Abstract
Fiber drawing from a 3D printed perform was recently discussed to go beyond the limitations of conventional optical fiber manufacturing in terms of structure and materials. In this work, the photosensitivity of silica optical fibers to femtosecond laser light, and fabricated by 3D [...] Read more.
Fiber drawing from a 3D printed perform was recently discussed to go beyond the limitations of conventional optical fiber manufacturing in terms of structure and materials. In this work, the photosensitivity of silica optical fibers to femtosecond laser light, and fabricated by 3D printing a preform, is investigated. The writing kinetics and the thermal performance of Type II modifications are studied by varying the laser pulse energy and investigating the birefringence response of the femtosecond (fs)-laser written structures. Compared with a conventional telecom single mode fiber (SMF28), the fiber made by 3D printing is found to have similar writing kinetics and thermal performance. Additionally, the thermal stability of the imprinted fs-laser induced nanostructures is investigated based on the Rayleigh–Plesset equation, describing a model of nanopores dissolution underpinning Type II modifications with thermal annealing. Full article
(This article belongs to the Special Issue Silica-Based Optical Fibers Technologies)
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