Special Issue "Infrared Fiber Lasers and Their Applications in Materials Processing"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: 31 December 2021.

Special Issue Editors

Dr. Lukasz Sójka
Website
Guest Editor
Telecommunications and Teleinformatics Department, Wroclaw University of Technology, Wybrzeze, Wyspianskiego 27, 50-370 Wroclaw, Poland
Interests: fiber lasers;mid-infrared photonics;fiber optics
Prof. Slawomir Sujecki
Website
Guest Editor
Department of Telecommunications and Teleinformatics, Wroclaw University of Technology, Wybrzeze, Wyspianskiego 27, 50-370 Wroclaw, Poland
Interests: fiber lasers;mid-infrared photonics;fiber optics;DWDM systems
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Special Issue Information

Dear Colleagues,

Progress in laser technology has always been stimulated by the development of new materials. This is also true for fiber lasers. Fiber lasers can be characterized by good quality of the output beam, small dimensions, high efficiency, excellent heat dissipation properties, and very good reliability. Due to these unique features, fiber lasers have been the key enabling technology for many applications. Thus, over the past decades, the availability of fiber lasers with high output beam quality at moderate cost has enabled significant progress in other fields of science, e.g., medicine, materials processing, or environmental monitoring. Spectacular progress has been achieved within the near infrared wavelength range whereby the output power produced by fiber lasers has continuously increased and has reached several kW in the continuous wave (CW) regime.

Recently, significant progress has also been achieved in the development of mid-infrared fiber lasers. The development of fiber lasers operating in the mid-infrared wavelength region can lead to novel material processing applications. For instance, mid-infrared fiber lasers are ideally suited to replace common mid-IR emitters for material processing applications, e.g., CO2 gas lasers. Furthermore, many important compounds have strong absorption bands in the mid-infrared region. Therefore, lasers operating in this spectral region can potentially provide desirable enabling technology platforms for the development of novel, more compact and reliable materials processing systems. For instance, polymers have strong absorption bands in the mid-infrared wavelength region with a particularly strong absorption band occurring around 3.4 µm, due to C–H bond stretching. Thus, fiber lasers operating close to 3.4 µm could be instrumental to plastic processing systems that weld, cut, or engrave plastic. Water-based materials also have strong mid-infrared absorption bands within the wavelength range spanning from 2 to 10.6 µm. Thus, fiber lasers operating within this spectral region might stimulate progress in the development of novel medical surgery procedures.

The purpose of this Special Issue is to present the state of the art in the field of infrared fiber lasers with a specific focus on applications in materials processing. Thus, we encourage the contribution of papers that cover topics related to this field of research, examples of which include the following keywords.

Papers that address topics not listed above but that are related to the topic of this Special Issue will be given consideration. Thus, we encourage all potential authors to contact the editors prior to manuscript preparation if in doubt as to whether the potential contribution falls within the remits of this call.

Dr. Lukasz Sójka
Prof. Slawomir Sujecki
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 papers will be 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. Materials 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 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

  • Mid-infrared fiber lasers
  • Materials processing by fiber lasers
  • Medical application of mid-infrared fiber lasers
  • Mid-infrared Raman lasers
  • Novel near-infrared fiber lasers for materials processing
  • Optical fibers used for delivering laser beams
  • Numerical modeling of novel mid-infrared fiber lasers.

Published Papers (2 papers)

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Research

Open AccessArticle
Infrared Laser Application to Wood Cutting
Materials 2020, 13(22), 5222; https://doi.org/10.3390/ma13225222 - 19 Nov 2020
Abstract
While lasers are widely used across various industries, including woodworking, few studies to date have addressed the issue of cutting fresh wood. In the present investigation, wood stemming from fresh tree branches was cut at different laser powers and beam travel speeds. A [...] Read more.
While lasers are widely used across various industries, including woodworking, few studies to date have addressed the issue of cutting fresh wood. In the present investigation, wood stemming from fresh tree branches was cut at different laser powers and beam travel speeds. A fiber laser and a CO2 laser were used for the research. The cellular structures of the cut surfaces were examined, with some of them found to be covered with a layer of compacted, charred cells. This may be a favorable phenomenon, preventing the invasion of pathogens via the wounds caused by laser beam branch cutting in nurseries, plantations, and orchards. Full article
(This article belongs to the Special Issue Infrared Fiber Lasers and Their Applications in Materials Processing)
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Open AccessArticle
Active Optical Fibers and Components for Fiber Lasers Emitting in the 2-μm Spectral Range
Materials 2020, 13(22), 5177; https://doi.org/10.3390/ma13225177 - 17 Nov 2020
Cited by 1
Abstract
Laser sources emitting in the infrared range at around 2 µm are attracting great interest for a variety of applications like processing of transparent thermoplastic polymers in industry as well as plenty of applications in medicine, spectroscopy, gas sensing, nonlinear frequency conversion to [...] Read more.
Laser sources emitting in the infrared range at around 2 µm are attracting great interest for a variety of applications like processing of transparent thermoplastic polymers in industry as well as plenty of applications in medicine, spectroscopy, gas sensing, nonlinear frequency conversion to the mid-infrared, to mention a few. Of late, fiber lasers compared to other kinds of lasers benefit from their all-fiber design, leading to a compact, robust, and well thermally manageable device. Particularly, thulium- and holmium-doped fiber lasers are the first choice in fiber lasers emitting light around 2 µm. In this paper, we give an overview of our recent results in the research on thulium- and holmium-doped optical fibers, fiber lasers, and related research topics in the 2-µm spectral range. In particular, we present, to our knowledge, the first results of improvement of pump absorption in double-clad fibers thanks to the fiber twist frozen during drawing. Finally, a brief demonstration of material processing by thulium all-fiber laser operating at 2 µm is presented. Full article
(This article belongs to the Special Issue Infrared Fiber Lasers and Their Applications in Materials Processing)
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