Development of pedestal-free large mode area fibers withTm3+ doped silica nanostructured core

0580712 - ÚFE 2024 RIV US eng J - Journal Article
Peterka, Pavel - Aubrecht, Jan - Pysz, D. - Franczyk, M. - Schreiber, Ondřej - Kamrádek, Michal - Kašík, Ivan - Buczyński, R.
Development of pedestal-free large mode area fibers withTm3+ doped silica nanostructured core.
Optics Express. Roč. 31, č. 26 (2023), s. 43004-43016. ISSN 1094-4087
R&D Projects: GA ČR(CZ) GA23-05701S; GA ČR(CZ) GF21-45431L
Institutional support: RVO:67985882
Keywords : Fibers * Nano-structured * Doped silicas * Fiber lasers
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.8, year: 2022
Method of publishing: Open access
https://doi.org/10.1364/OE.503047

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
Permanent Link: https://hdl.handle.net/11104/0349465