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Article

Active Optical Fibers and Components for Fiber Lasers Emitting in the 2-μm Spectral Range

1
Institute of Photonics and Electronics of the Czech Academy of Sciences, Chaberská 57, 182 51 Prague, Czech Republic
2
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic
3
Optoelectronic Research Center, University of Southampton, Southampton, Hampshire SO17 1BJ, UK
4
SQS Vláknová Optika, a.s., 509 01 Nova Paka, Czech Republic
*
Author to whom correspondence should be addressed.
Materials 2020, 13(22), 5177; https://doi.org/10.3390/ma13225177
Received: 9 October 2020 / Revised: 7 November 2020 / Accepted: 12 November 2020 / Published: 17 November 2020
(This article belongs to the Special Issue Infrared Fiber Lasers and Their Applications in Materials Processing)
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. View Full-Text
Keywords: rare-earth (RE) doped optical fibers; nanoparticle doping; fiber lasers; preform shaping; fused fiber components; Bragg gratings; mode-locked fiber lasers; self-swept fiber lasers; fiber laser material processing rare-earth (RE) doped optical fibers; nanoparticle doping; fiber lasers; preform shaping; fused fiber components; Bragg gratings; mode-locked fiber lasers; self-swept fiber lasers; fiber laser material processing
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MDPI and ACS Style

Todorov, F.; Aubrecht, J.; Peterka, P.; Schreiber, O.; Jasim, A.A.; Mrázek, J.; Podrazký, O.; Kamrádek, M.; Kanagaraj, N.; Grábner, M.; Baravets, Y.; Cajzl, J.; Koška, P.; Fišar, A.; Kašík, I.; Honzátko, P. Active Optical Fibers and Components for Fiber Lasers Emitting in the 2-μm Spectral Range. Materials 2020, 13, 5177. https://doi.org/10.3390/ma13225177

AMA Style

Todorov F, Aubrecht J, Peterka P, Schreiber O, Jasim AA, Mrázek J, Podrazký O, Kamrádek M, Kanagaraj N, Grábner M, Baravets Y, Cajzl J, Koška P, Fišar A, Kašík I, Honzátko P. 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

Chicago/Turabian Style

Todorov, Filip, Jan Aubrecht, Pavel Peterka, Ondřej Schreiber, Ali A. Jasim, Jan Mrázek, Ondřej Podrazký, Michal Kamrádek, Nithyanandan Kanagaraj, Martin Grábner, Yauhen Baravets, Jakub Cajzl, Pavel Koška, Adam Fišar, Ivan Kašík, and Pavel Honzátko. 2020. "Active Optical Fibers and Components for Fiber Lasers Emitting in the 2-μm Spectral Range" Materials 13, no. 22: 5177. https://doi.org/10.3390/ma13225177

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