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Development of pedestal-free large mode area fibers withTm3+ doped silica nanostructured core
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SYSNO ASEP 0580712 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Development of pedestal-free large mode area fibers withTm3+ doped silica nanostructured core Author(s) Peterka, Pavel (URE-Y) RID, ORCID
Aubrecht, Jan (URE-Y) RID, ORCID
Pysz, D. (PL)
Franczyk, M. (PL)
Schreiber, Ondřej (URE-Y)
Kamrádek, Michal (URE-Y) RID
Kašík, Ivan (URE-Y) RID
Buczyński, R. (PL)Number of authors 8 Source Title Optics Express. - : Optical Society of America - ISSN 1094-4087
Roč. 31, č. 26 (2023), s. 43004-43016Number of pages 13 s. Publication form Print - P Language eng - English Country US - United States Keywords Fibers ; Nano-structured ; Doped silicas ; Fiber lasers Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GA23-05701S GA ČR - Czech Science Foundation (CSF) GF21-45431L GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support URE-Y - RVO:67985882 UT WOS 001155842300007 EID SCOPUS 85180270097 DOI https://doi.org/10.1364/OE.503047 Annotation We present the pedestal-free thulium doped silica fiber with a large nanostructured core optimized for fiber lasers. The fiber is composed of over 6 thousand thulium doped silica nanorods with a diameter of 71 nm each which form a nanostructured step-index core. We study the influence of non-continuous distribution in nanoscale active areas on gain, beam quality, and fiber laser performance. The proof-of-concept fiber is effectively single mode for wavelength above 1.8 μm. We demonstrate the performance of the fiber in a laser setup pumped at 792 nm. Single mode laser emission with a slope efficiency of 29% at quasi-continuous output power of 4 W with M2= 1.3 at the emission spectrum 1880-1925 nm is achieved Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2024 Electronic address https://doi.org/10.1364/OE.503047
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