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Photonics
Special Issues
Fiber Lasers: Recent Advances and Applications
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Fiber Lasers: Recent Advances and Applications

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optoelectronics and Optical Materials".

Deadline for manuscript submissions: 30 April 2025 | Viewed by 2931

Special Issue Editors

Dr. Lau Kuen Yao

E-Mail Website
Guest Editor
State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
Interests: optical fibers; fiber laser; nonlinear optics
Special Issues, Collections and Topics in MDPI journals
Dr. Jiancheng Zheng

E-Mail
Guest Editor
College of Information Engineering, Sanming University, Sanming 365004, China
Interests: fiber laser; laser technology

Special Issue Information

Dear Colleagues,

As one of the most popular laser sources today, fiber lasers are well developed for a plethora of applications, such as optical communications, sensing, biomedical, spectroscopy and imaging, material processing, micromachining, etc. A fiber laser can be a linear or ring-type laser with doped fiber as gain medium, operating in narrow linewidths, single frequencies, as well as Q-switched and mode-locked regimes. To date, there is a growing demand for a high-performance fiber laser with higher operating powers, higher slope efficiency, better beam quality, and more.

The fiber laser concept is developed by realizing upconversion lasers due to the need for high pump intensities during laser transition operations. Such high pump intensities can be well maintained over long lengths, which offers a higher gain efficiency for operations across low-gain transitions. The gain transitions are achieved through the use of active optical fibers (such as doped silica fibers) and heavy-metal fluoride fibers (such as ZBLAN).

The Special Issue aims to present original state-of-the-art research articles dealing with recent advances and applications of fiber lasers. Researchers are invited to submit their contributions to this Special Issue. Topics include, but are not limited to, the following:

  • Fiber lasers;
  • Narrow linewidth fiber lasers;
  • Single longitudinal mode fiber lasers;
  • Q-switched fiber lasers;
  • Mode-locked fiber lasers;
  • Multiwavelength fiber lasers;
  • Brillouin fiber lasers;
  • Raman fiber lasers;
  • Fiber lasers with semiconductor optical amplifiers;
  • High-power fiber lasers;
  • Modeling of fiber lasers;
  • Supercontinuum fiber lasers;
  • Applications of fiber lasers.

Dr. Lau Kuen Yao
Dr. Jiancheng Zheng
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. Photonics 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 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

  • fiber lasers
  • optical fibers
  • laser resonators
  • advances of fiber laser
  • fiber laser applications

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Published Papers (3 papers)

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Research

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15 pages, 4852 KiB  
Article
Characterization of Holmium-Doped Fiber Using AOM and Considering Pair-Induced Quenching and Fiber Length
by Yuri Barmenkov, Pablo Muniz-Cánovas, José-Luis Cruz and Miguel V. Andrés
Photonics 2024, 11(11), 1043; https://doi.org/10.3390/photonics11111043 - 7 Nov 2024
Viewed by 473
Abstract
In this paper, we present the results of an experimental study on the characterization of holmium-doped silica fiber. A standard acousto-optic modulator controls the output power of the ytterbium-doped fiber laser operating at 1134.5 nm and serving as a pump source of the [...] Read more.
In this paper, we present the results of an experimental study on the characterization of holmium-doped silica fiber. A standard acousto-optic modulator controls the output power of the ytterbium-doped fiber laser operating at 1134.5 nm and serving as a pump source of the holmium-doped fiber under test. This technique allows us to measure the lifetimes of 5I7 and 5I8 energy levels of Ho3+ ions. The effects of the fiber length and the concentration-dependent pair-induced quenching on the accuracy of the fluorescence lifetime measurement are considered. The results of this study are compared with those obtained using the exponential and Förster decay functions used for such types of measurements. It is demonstrated that the knowledge of two fiber parameters, the pump saturation power and the fluorescence saturation power, together with the fiber absorption spectrum, permits one to obtain the absorption cross-sections at the pump and other key wavelengths, the effective concentration of the active ions, and the quantum efficiency of the fluorescence from the laser level. The results of this study are applicable to the reliable characterization of any type of heavily doped gain fibers and to the further numerical modeling and optimization of fiber lasers. Full article
(This article belongs to the Special Issue Fiber Lasers: Recent Advances and Applications)
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19 pages, 5647 KiB  
Article
Experimental State Observer of the Population Inversion of a Multistable Erbium-Doped Fiber Laser
by Daniel Alejandro Magallón-García, Didier López-Mancilla, Rider Jaimes-Reátegui, Juan Hugo García-López, Guillermo Huerta Cuellar, Luis Javier Ontañon-García and Fabian Soto-Casillas
Photonics 2024, 11(10), 951; https://doi.org/10.3390/photonics11100951 - 10 Oct 2024
Viewed by 481
Abstract
In this work, numerical and experimental implementation of a state observer applied to an erbium-doped fiber laser (EDFL) has been developed. The state observer is designed through the mathematical model of the EDFL to estimate the non-measurable variable; however, in numerical estimation, the [...] Read more.
In this work, numerical and experimental implementation of a state observer applied to an erbium-doped fiber laser (EDFL) has been developed. The state observer is designed through the mathematical model of the EDFL to estimate the non-measurable variable; however, in numerical estimation, the state variables can be measurable given the mathematical model. Only the laser intensity variable was experimentally measured. The state observer estimated the population inversion through the obtained experimental laser intensity time series fitted with their numerical laser intensity using the mean square error (MSE) tool. A bifurcation diagram of the population inversion time series local maximum was built from the state observer. The state space of the experimental laser intensity versus observed population inversion was built. Full article
(This article belongs to the Special Issue Fiber Lasers: Recent Advances and Applications)
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Review

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16 pages, 9500 KiB  
Review
Bismuth-Doped Fiber Lasers and Amplifiers Operating from O- to U-Band: Current State of the Art and Outlook
by Sergey Alyshev, Aleksandr Khegai, Andrey Umnikov and Sergei Firstov
Photonics 2024, 11(7), 663; https://doi.org/10.3390/photonics11070663 - 17 Jul 2024
Viewed by 1282
Abstract
The development of unique optical materials that provide amplification and lasing in new wavelength ranges is a major scientific problem, the solution of which is becoming the basis for the emergence of new optical technologies, which are primarily targeting the expanding of operating [...] Read more.
The development of unique optical materials that provide amplification and lasing in new wavelength ranges is a major scientific problem, the solution of which is becoming the basis for the emergence of new optical technologies, which are primarily targeting the expanding of operating wavelengths in silica glass. In fact, one of the notable advances in the field of fiber optics over the past two decades has been the production of a new type of laser-active fibers (namely bismuth-doped fibers), which has made it possible to cover previously inaccessible (for rare-earth-doped fibers) spectral ranges, in particular O-, E-, S-, and U-telecom bands. The advance in this direction has led to further growth of the technological capabilities in the telecom industry for amplification and generation of optical radiation in various wavelength bands, which will result in the near future to overcoming the problem known as “capacity crunch” by means of expanding the data transmission range. Recently, bismuth-doped fibers have been actively studying in order to improve their characteristics, which would allow for efficient implementation of optical devices based on bismuth-doped fibers (BDFs) with deployed telecommunications systems. This is one of the dynamically developing areas, where progress has already manifested in form of emergence of new achievements, in particular commercially available various types of BDFs, as well as a series of novel fiber-optic amplifiers for the O- and E-bands. In this review, a number of scientific studies that have already led to a noticeable progress in the field of optical properties of BDFs and the practical implementation of optical devices (lasers and amplifiers) based on them are presented and discussed, with much attention to the achievements of recent years. Full article
(This article belongs to the Special Issue Fiber Lasers: Recent Advances and Applications)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Characterization of holmium-doped fiber using an acousto-optic modulator and considering the pair-induced quenching and fiber length
Authors: Yuri Barmenkov; Pablo Muniz-Cánovas; José-Luis Cruz; Miguel V. Andrés
Affiliation: Centro de Investigaciones en Optica A.C., Loma del Bosque 115, 37150 Leon, Gto., Mexico
Abstract: In this paper, we present the results of an experimental study relating to the characterization of holmium-doped silica fiber. We proposed to apply a standard acousto-optic modulator permitting rapid modulation of the ytterbium-doped fiber laser power at 1134.5 nm, which pumps the holmium-doped fiber under test. This technique allows measuring the lifetimes of 5I7 and 5I8 energy levels of Ho3+ ions. We studied the effects of the fiber length and the concentration-dependent pair-induced quenching on the accuracy of measuring the fluorescence lifetime. The results of this study were compared with those obtained using the Förster decay function used for such types of measurements. We also demonstrated that knowledge of two fiber parameters, the pump saturation power, and the fluorescence saturation power, together with the fiber absorption spectrum, permits one to obtain the absorption cross-sections at the pump and other key wavelengths, the effective concentration of the active ions, and the quantum efficiency of the fluorescence from the laser level. The results of the presented work are applicable for more reliable characterization of heavily doped gain fibers, as well as for further numerical modeling and optimization of fiber lasers.

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