Open AccessNumerical analysis of 2.7 μm lasing in Er3+-doped tellurite fiber lasers
Author(s) -
Weichao Wang,
LI Li-xiu,
Dongdan Chen,
Qinyuan Zhang
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep31761
Subject(s) - fiber laser , slope efficiency , lasing threshold , materials science , laser , optics , multi mode optical fiber , fiber , rate equation , power (physics) , optoelectronics , optical fiber , physics , quantum mechanics , kinetics , composite material
The laser performance of Er 3+ -doped tellurite fiber lasers operating at 2.7 μm due to 4 I 11/2 → 4 I 13/2 transition has been theoretically studied by using rate equations and propagation equations. The effects of pumping configuration and fiber length on the output power, slope efficiency, threshold, and intracavity pump and laser power distributions have been systematically investigated to optimize the performance of fiber lasers. When the pump power is 20 W, the maximum slope efficiency (27.62%), maximum output power (5.219 W), and minimum threshold (278.90 mW) are predicted with different fiber lengths (0.05–5 m) under three pumping configurations. It is also found that reasonable output power is expected for fiber loss below 2 dB/ m. The numerical modeling on the two- and three-dimensional laser field distributions are further analyzed to reveal the characteristics of this multimode step-index tellurite fiber. Preliminary simulation results show that this Er 3+ -doped tellurite fiber is an excellent alternative to conventional fluoride fiber for developing efficient 2.7 μm fiber lasers.