@ARTICLE{Grábner_Martin_Formula_2021,
 author={Grábner, Martin and Peterka, Pavel and Honzátko, Pavel},
 volume={29},
 number={4},
 journal={Opto-Electronics Review},
 pages={126-132},
 howpublished={online},
 year={2021},
 publisher={Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology},
 abstract={High power fibre lasers need to be cooled efficiently to avoid their thermal damage. Temperature distribution in fibre should be estimated during the fibre laser design process. The steady-state heat equation in a cylindrical geometry is solved to derive a practical formula for temperature radial distribution in multi-layered optical fibres with arbitrary number of the layers. The heat source is located in one or more cylindrical domains. The validity of the analytical formula is tested by comparison with static heat transfer simulations of typical application examples including octagonal double clad fibre, air-clad fibre, fibre with nonuniform, microstructured core. The accuracy sufficient for practical use is reported even for cases with not exactly cylindrical domains.},
 type={Article},
 title={Formula for temperature distribution in multi-layer optical fibres for high-power fibre lasers},
 URL={http://journals.pan.pl/Content/121424/PDF/OPELRE_2021_29_4_M.%20Grabner.pdf},
 doi={10.24425/opelre.2021.139482},
 keywords={high-power fibre lasers, active optical fibres, temperature distribution, heat transfer},
}