SWIR and MWIR Fiber-Based Coherent Sources

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

Deadline for manuscript submissions: closed (30 November 2018) | Viewed by 10225

Special Issue Editor


E-Mail Website1 Website2
Guest Editor
1. Institute of Systems Optimization (ITE), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 1, 76131 Karlsruhe, Germany
2. Fraunhofer Institute of Optronics, System Technologies and Image Exploitation (IOSB), Gutleuthausstr. 1, 76275 Ettlingen, Germany
Interests: near- and mid-infrared fiber lasers; fiber materials and components; solid-state lasers and laser materials; mid-infrared non-linear wavelength conversion and non-linear materials; optronics

Special Issue Information

Dear Colleagues,

Fiber lasers and fiber-based coherent sources are well known for their unique properties, important in many current and future applications: They combine efficiency and high output power, owing to their advantageous thermal management with high beam quality and high integrability and compactness as a result of the wave guiding employed.

This Special Issue focuses on SWIR and MWIR fiber lasers and fiber-based coherent sources, i.e., sources emitting in the wavelength range from 1.5 µm to beyond 5 µm, a topic with perduring interest that strongly increased in recent years and which addresses a wavelength range that becomes more and more important in the near- and mid-term future. Applications range from environmental monitoring and sensing in the unique fingerprint region of molecular absorption, over medical surgery and plastic processing employing several absorption features of water and plastic materials up to specific applications in defense and security.

The topics presented and discussed reflect the current state of the art and recent developments in novel doped fibers for direct emission, directly emitting fiber lasers, fiber lasers for pumping applications in non-linear frequency conversion and indirect fiber-based sources using non-linear fibers based on mid-IR materials.

Prof. Dr. Marc Eichhorn
Guest Editor

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Keywords

  • SWIR fiber laser
  • MWIR fiber laser
  • Erbium
  • Thulium
  • Holmium
  • Silica fibers
  • Fluoride fibers
  • Telluride fibers
  • Chalcogenide fibers
  • Fiber non-linear mid-IR frequency conversion
  • Supercontinuum generation

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Published Papers (1 paper)

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Research

15 pages, 4539 KiB  
Article
Thulium-Doped Silica Fibers with Enhanced Fluorescence Lifetime and Their Application in Ultrafast Fiber Lasers
by Jakub Cajzl, Pavel Peterka, Maciej Kowalczyk, Jan Tarka, Grzegorz Sobon, Jaroslaw Sotor, Jan Aubrecht, Pavel Honzátko and Ivan Kašík
Fibers 2018, 6(3), 66; https://doi.org/10.3390/fib6030066 - 16 Sep 2018
Cited by 39 | Viewed by 9515
Abstract
In this work we report on the thulium-doped silica-based optical fibers with increased fluorescence lifetime of the 3F4 level thanks to the modification of the local environment of thulium ions by high content of alumina. The determination of the cross-relaxation energy-transfer [...] Read more.
In this work we report on the thulium-doped silica-based optical fibers with increased fluorescence lifetime of the 3F4 level thanks to the modification of the local environment of thulium ions by high content of alumina. The determination of the cross-relaxation energy-transfer coefficients from the measurements of the fluorescence lifetimes of the 3F4 and 3H4 energy levels of Tm3+ ions in the experimentally prepared optical fiber is provided as well. Preforms of optical fibers were prepared either by conventional solution-doping of Tm3+ and Al3+ ions or by dispersion-doping of Tm3+ ions with alumina nanoparticles. Optical fibers were characterized by means of Tm, Al, and Ge concentrations, refractive index profiles, optical spectral absorption and luminescence, and by time-resolved fluorescence spectroscopy. Highly aluminium-codoped thulium silicate optical fibers exhibited fluorescence lifetimes of over ~500 μs with maximum value of 756 μs, which means a fluorescence lifetime enhancement when compared to the thulium-doped fibers reported elsewhere. We show an application of the thulium-doped fiber in a compact all-fiber ring laser that is passively mode-locked by using graphene-based saturable absorber. The output pulsewidth and repetition rate were 905 fs and 32.67 MHz, respectively. Full article
(This article belongs to the Special Issue SWIR and MWIR Fiber-Based Coherent Sources)
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