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Advances in Optical Fibers II
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Advances in Optical Fibers II

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

Deadline for manuscript submissions: closed (31 March 2017) | Viewed by 63909

Special Issue Editors

Dr. Giancarlo C. Righini

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Guest Editor
"Nello Carrara" Institute of Applied Physics—National Research Council (IFAC-CNR), I-50019 Firenze, Italy
Interests: glassy and glass-ceramic materials; nanostructured materials; microfabrication; integrated optics; optical microresonators
Special Issues, Collections and Topics in MDPI journals
Dr. Shibin Jiang

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Guest Editor
AdValue Photonics, Tucson (AZ), USA
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Francesco Prudenzano

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Guest Editor
Department of Electrical Engineering and Information, Entries Polytechnic University of Bari, Via Orabona, 4-70125 Bari, Italy
Interests: fiber optics; long period grating (LPG) fiber devices; rare-earth doped fiber laser; microwave photonics; microwave devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Optical fibers have largely demonstrated a central role in a growing number of current technologies and applications. The continuous advances in fabrication methods, materials and structures, combined with researchers’ ingenuity, have led to an impressive amount of new components and applications in the last decade, especially in optical communications, sensing, defense and security, automotive, and biomedicine. Three years after the successful first Special Issue (SI) of this journal devoted to “Advances in Optical Fibers”, the purpose of the present SI is again to collate contributions by experts from academia, industry, and the public/government sector to survey the most recent advances and prospects in optical fiber materials, designs, and applications.

Topics include: materials, processing, fabrication technologies, measurements, propagation properties, modeling, fiber designs, microstructured and photonic-crystal fibers, fiber devices and passive components, fiber gratings and their applications, specialty fibers, micro and nano-fibers, fiber sensors, fiber optic probes, fiber amplifiers and lasers, IR and THz fibers, novel applications.

Dr. Giancarlo C. Righini
Dr. Shibin Jiang
Prof. Dr. Francesco
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. 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

  • fiber optics
  • design and theory
  • advanced fiber materials
  • fiber characterization
  • photonic crystal fibers
  • micro and nano fibers
  • THz fibers
  • fiber sensors
  • fiber lasers
  • nonlinear processes in fibers
  • ultrafast processes in fibers

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Published Papers (6 papers)

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Research

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4052 KiB  
Article
Manufacturing and Spectral Features of Different Types of Long Period Fiber Gratings: Phase-Shifted, Turn-Around Point, Internally Tilted, and Pseudo-Random
by Francesco Chiavaioli, Francesco Baldini and Cosimo Trono
Fibers 2017, 5(3), 29; https://doi.org/10.3390/fib5030029 - 8 Aug 2017
Cited by 14 | Viewed by 7608
Abstract
The manufacturing and spectral features of different types of long period fiber gratings (LPFGs), ranging from phase-shifted, turn-around point, and internally tilted gratings, to pseudo-random gratings, are described and discussed in detail. LPFGs were manufactured on boron-germanium co-doped photosensitive optical fibers with the [...] Read more.
The manufacturing and spectral features of different types of long period fiber gratings (LPFGs), ranging from phase-shifted, turn-around point, and internally tilted gratings, to pseudo-random gratings, are described and discussed in detail. LPFGs were manufactured on boron-germanium co-doped photosensitive optical fibers with the point-by-point technique using an excimer KrF laser operating at 248 nm. The developed experimental setup to manufacture high-quality LPFGs was designed to totally customize any type of gratings with the possibility of setting different parameters, such as the grating period (or pitch), the number of grating planes, the number of laser shots for each plane, etc. Some important spectral features of the LPFGs’ spectra were taken into account. This allows realizing homemade devices useful in several fiber-based applications, such as optical filtering, coupling systems, random lasers, physical and chemical sensing, and biosensing. Full article
(This article belongs to the Special Issue Advances in Optical Fibers II)
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2361 KiB  
Article
Compact Narrow Linewidth Actively Q-Switched Er–Yb Double-Clad Fiber Laser
by Berenice Posada-Ramírez, Manuel Durán-Sánchez, Ricardo I. Alvarez-Tamayo, Jared Alaniz-Baylón, Guillermo Salceda-Delgado, Evgeny A. Kuzin and Baldemar Ibarra-Escamilla
Fibers 2017, 5(2), 21; https://doi.org/10.3390/fib5020021 - 3 Jun 2017
Cited by 7 | Viewed by 7859
Abstract
Actively Q-switched laser operation of a narrow linewidth compact fiber laser based on an Er–Yb double-clad fiber is presented. The laser linewidth as a function of the repetition rate and the Q-switched pulses characteristics for different pump powers are experimentally analyzed. Stable Q-switched [...] Read more.
Actively Q-switched laser operation of a narrow linewidth compact fiber laser based on an Er–Yb double-clad fiber is presented. The laser linewidth as a function of the repetition rate and the Q-switched pulses characteristics for different pump powers are experimentally analyzed. Stable Q-switched laser operation with spectral laser linewidth of 73 pm in a repetition rate range from 90 to 270 kHz is obtained. The minimum pulse duration of 178 ns, maximum peak power of 30.5 W, and maximum pulse energy of 5.4 µJ are observed. The maximum average power reached is 1.1 W. Full article
(This article belongs to the Special Issue Advances in Optical Fibers II)
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2195 KiB  
Article
Luminescent Properties of Oxazine 170 Perchlorate Doped PMMA Fiber
by Piotr Miluski
Fibers 2017, 5(2), 15; https://doi.org/10.3390/fib5020015 - 19 Apr 2017
Cited by 11 | Viewed by 9831
Abstract
The article presents fabrication and luminescent properties of poly(methyl methacrylate) (PMMA) fiber doped by Oxazine 170 perchlorate. The bright fluorescence of polymeric fiber (at molar fluorescent organic dye concentration 4.3 × 10−5) was characterized in terms of spectrum and signal attenuation [...] Read more.
The article presents fabrication and luminescent properties of poly(methyl methacrylate) (PMMA) fiber doped by Oxazine 170 perchlorate. The bright fluorescence of polymeric fiber (at molar fluorescent organic dye concentration 4.3 × 10−5) was characterized in terms of spectrum and signal attenuation vs. the fiber length. The significant changes in fluorescence spectrum (λmax red shift average slope 4.6 nm/cm and Full Width at Half Maximum (FWHM) increasing slope 6.7 nm/cm) have been noticed for the length of the fiber (0.02–0.08 m) which corresponds to a high overlapping region of absorption and emission spectra of used dye. The red shift of λmax (c.a. 80 nm) was presented in fabricated polymeric fiber at distance 0.85 m. The obtained characteristics can be used for luminescent properties optimization of fluorescent organic-dye-doped PMMA fiber. Full article
(This article belongs to the Special Issue Advances in Optical Fibers II)
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Review

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7869 KiB  
Review
Granulated Silica Method for the Fiber Preform Production
by Sönke Pilz, Hossein Najafi, Manuel Ryser and Valerio Romano
Fibers 2017, 5(3), 24; https://doi.org/10.3390/fib5030024 - 11 Jul 2017
Cited by 11 | Viewed by 12389
Abstract
During the past few years, we have studied the granulated silica method as a versatile and cost effective way of fiber preform production and the sol-gel method. Until now, we have used the sol-gel technology together with an iterative re-melting and milling step [...] Read more.
During the past few years, we have studied the granulated silica method as a versatile and cost effective way of fiber preform production and the sol-gel method. Until now, we have used the sol-gel technology together with an iterative re-melting and milling step in order to produce rare earth or transition metal doped granular material for the granulated silica method. Here, we present that the iterative re-melting (laser-assisted) and milling step is no longer needed to reach a high homogeneity. The sol-gel method also offers a high degree of compositional flexibility with respect to dopants; it further facilitates achieving high concentrations, even in cases when several dopants are used. We employed optical active doped sol-gel derived granulate for the fiber core, whereas pure or index-raised granulated silica has been employed for the cladding. Based on the powder-in-tube technique, where silica glass tubes are appropriately filled with these granular materials, fibers has been directly drawn (“fiber rapid prototyping”), or eventually after an additional optional quality enhancing vitrification step. The powder-in-tube technique is also ideally suited for the preparation of microstructured optical fibers. Full article
(This article belongs to the Special Issue Advances in Optical Fibers II)
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3523 KiB  
Review
Advances in Mid-IR Fiber Lasers: Tellurite, Fluoride and Chalcogenide
by Mario Christian Falconi, Dario Laneve and Francesco Prudenzano
Fibers 2017, 5(2), 23; https://doi.org/10.3390/fib5020023 - 15 Jun 2017
Cited by 37 | Viewed by 8510
Abstract
A review on the recent progress in modeling and fabrication of medium infrared (Mid-IR) fiber lasers is reported. The main objective is to illustrate some recent examples of continuous wave optical sources at wavelengths longer than those commonly employed in telecom applications and [...] Read more.
A review on the recent progress in modeling and fabrication of medium infrared (Mid-IR) fiber lasers is reported. The main objective is to illustrate some recent examples of continuous wave optical sources at wavelengths longer than those commonly employed in telecom applications and allowing high beam quality. A small number of Mid-IR lasers, among the large variety of schemes, glasses, dopants and pumping schemes reported in literature, is selected on the basis of their slope efficiency and threshold pump power. In particular, tellurite, fluoride and chalcogenide fiber lasers are considered. More details are given with reference to the novel pumping schemes. Full article
(This article belongs to the Special Issue Advances in Optical Fibers II)
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3285 KiB  
Review
Glass and Process Development for the Next Generation of Optical Fibers: A Review
by John Ballato, Heike Ebendorff-Heidepriem, Jiangbo Zhao, Laeticia Petit and Johann Troles
Fibers 2017, 5(1), 11; https://doi.org/10.3390/fib5010011 - 10 Mar 2017
Cited by 59 | Viewed by 16399
Abstract
Applications involving optical fibers have grown considerably in recent years with intense levels of research having been focused on the development of not only new generations of optical fiber materials and designs, but also on new processes for their preparation. In this paper, [...] Read more.
Applications involving optical fibers have grown considerably in recent years with intense levels of research having been focused on the development of not only new generations of optical fiber materials and designs, but also on new processes for their preparation. In this paper, we review the latest developments in advanced materials for optical fibers ranging from silica, to semi-conductors, to particle-containing glasses, to chalcogenides and also in process-related innovations. Full article
(This article belongs to the Special Issue Advances in Optical Fibers II)
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