Photodarkening as a heat source in ytterbium doped fiber amplifiers

Šušnjar, Peter (author), Agrež, Vid (author), Petkovšek, Rok (author)

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.

• Language: English
• Keywords: fiber lasers, photodarkening, ytterbium fibers, fiber characterization, thermal effects
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2018
• Number of pages: Str. 6420-6426
• Numbering: Vol. 26, no. 5, art. 314114
• PID: 20.500.12556/RUL-105145
• UDC: 535(045)
• ISSN on article: 1094-4087
• DOI: 10.1364/OE.26.006420
• COBISS.SI-ID: 15925531

Copyright

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).

• Publication date in RUL: 29.10.2018

Record is a part of a journal

• Title: Optics express
• Shortened title: Opt. express
• Publisher: Optica
• ISSN: 1094-4087
• COBISS.SI-ID: 8636438

Secondary language

• Language: Slovenian
• Keywords: vlakenski laserji, foto potemnenje, iterbijeva vlakna, karakterizacija vlaken, toplotni učinki