Energy transfer coefficients in thulium-doped silica fibers

0543288 - ÚFE 2022 RIV US eng J - Journal Article
Kamrádek, Michal - Aubrecht, Jan - Vařák, Petr - Cajzl, J. - Kubeček, V. - Honzátko, Pavel - Kašík, Ivan - Peterka, Pavel
Energy transfer coefficients in thulium-doped silica fibers.
Optical Materials Express. Roč. 11, č. 6 (2021), s. 1805-1814. ISSN 2159-3930
R&D Projects: GA ČR(CZ) GA19-03141S
Institutional support: RVO:67985882
Keywords : Energy transfer * Fiber lasers * Silica * Thulium
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.074, year: 2021
Method of publishing: Open access
https://doi.org/10.1364/OME.427456

Energy transfer coefficients in thulium-doped silica fibers are key parameters for a reliable numerical modeling and optimization of high-power fiber lasers pumped at 790 nm and emitting around eye-safer wavelength of 2 mu m. We report on determination of the energy transfer coefficients by comparing experimental values and rate-equation-based modeling of thulium fluorescence decays. The study was performed using two pump, 792 nm and 1620 nm, and two signal, 800 nm and 2 mu m, wavelengths. The following values were obtained k(3011) = (1.9 +/- 0.2) x 10(-22 )m(3 )S(-1),( ) k(1130) = (1.4 +/- 0.2) x 10(-23) m(3) S-1 and k(1120) = (3.5 +/- 0.1) x 10(-23) m(3) s(-1). To the best of our knowledge, this study involves so far the most comprehensive comparison of various fluorescence decays in terms of excitation and detection wavelengths as well as excitation powers
Permanent Link: http://hdl.handle.net/11104/0320521