Thulium Cross Sections Temperature Dependence and its Effect on Fiber Laser Operation

0583903 - ÚFE 2024 RIV PL eng C - Conference Paper (international conference)
Peterka, Pavel - Jiříčková, Bára - Schreiber, Ondřej - Grábner, Martin
Thulium Cross Sections Temperature Dependence and its Effect on Fiber Laser Operation.
23rd International Conference on Transparent Optical Networks, ICTON 2023. Varšava: IEEE, 2023 - (Jaworski, M.; Marciniak, M.), č. článku Mo.C6.3. ISBN 979-835030303-2. ISSN 2162-7339.
[23rd International Conference on Transparent Optical Networks, ICTON 2023. Bukurešť (RO), 02.07.2024-06.07.2024]
R&D Projects: GA ČR(CZ) GA23-05701S
Institutional support: RVO:67985882
Keywords : cooling * cross sections * fiber lasers * fluorescence lifetime * heating * temperature effect * thulium
OECD category: Optics (including laser optics and quantum optics)
https://ieeexplore.ieee.org/document/10207214

Thulium fiber lasers operating at wavelengths at around 2 micrometers have many unique applications in medicine, material processing, nonlinear frequency conversion, defense etc., but their output power significantly lags behind its potential, looking for laser technology breakthroughs that would eventually enable further increase of their output power. The main power limiting factors are associated with thermal and temperature effects. In this paper, recently reported temperature-dependent thulium cross sections are reviewed as well as application of these cross-section spectra for prediction of thulium fiber laser operation using two models. Firstly, closed-form expressions for the laser threshold and slope efficiency of thulium fiber lasers pumped at 790 nm by an ideal and realistic two-for-one process are derived. Secondly, comprehensive spatially and spectrally resolved numerical model is used
Permanent Link: https://hdl.handle.net/11104/0351885