20.500.12556/RUL-105145 Photodarkening as a heat source in ytterbium doped fiber amplifiers Theoretical and experimental evaluation of the photodarkening effect as a heat source in ytterbium doped fibers is presented. An additional non-radiative decay channel that opens after photodarkening the fiber is identified via fluorescence lifetime reduction and as an additional heat source proportional to inversion. It is included in the heat source model which was tested on a core-pumped fiber amplifiers. High temperature elevation at low pump powers shows potential heat-related problems in high inversion systems that are more susceptible to photodarkening. fiber lasers photodarkening ytterbium fibers fiber characterization thermal effects vlakenski laserji foto potemnenje iterbijeva vlakna karakterizacija vlaken toplotni učinki true false true Angleški jezik Slovenski jezik V članku navedeno: "© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement"; s povezavo https://www.osapublishing.org/library/license_v1.cfm (26. 3. 2021). Članek v reviji 2018-10-29 14:22:24 2018-10-29 14:22:26 2023-05-30 03:27:14 0000-00-00 00:00:00 2018 0 0 Str. 6420-6426 no. 5, art. 314114 Vol. 26 2018 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 535(045) 1094-4087 10.1364/OE.26.006420 15925531 8636438 RAZ_Susnjar_Peter_i2018.pdf RAZ_Susnjar_Peter_i2018.pdf 1 E1E3F84D373DE7885475CF1A082B66E0 22f47fa43554f350cffea9ebf957e079ca1f90ea448248e43f1af905b8fa38a1 26853cc4-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=115861 https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-26-5-6420&id=382306 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=115749 Fakulteta za strojništvo 0 0 0