High power tandem-pumped thulium-doped fiber laser.
Opt Express
; 23(3): 2991-8, 2015 Feb 09.
Article
in En
| MEDLINE
| ID: mdl-25836159
ABSTRACT
We propose a cascaded tandem pumping technique and show its high power and high efficient operation in the 2-µm wavelength region, opening up a new way to scale the output power of the 2-µm fiber laser to new levels (e.g. 10 kW). Using a 1942 nm Tm(3+) fiber laser as the pump source with the co- (counter-) propagating configuration, the 2020 nm Tm(3+) fiber laser generates 34.68 W (35.15W) of output power with 84.4% (86.3%) optical-to-optical efficiency and 91.7% (92.4%) slope efficiency, with respect to launched pump power. It provides the highest slope efficiency reported for 2-µm Tm(3+)-doped fiber lasers, and the highest output power for all-fiber tandem-pumped 2-µm fiber oscillators. This system fulfills the complete structure of the proposed cascaded tandem pumping technique in the 2-µm wavelength region (~1900 nm â ~1940 nm â ~2020 nm). Numerical analysis is also carried out to show the power scaling capability and efficiency of the cascaded tandem pumping technique.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Opt Express
Journal subject:
OFTALMOLOGIA
Year:
2015
Document type:
Article