High power resonant pumping of Tm-doped fiber amplifiers in core- and cladding-pumped configurations.
We have demonstrated ultra-high efficiency amplification in Tm-doped fiber with both core- and cladding-pumped configurations using a resonant tandem-pumping approach. These Tm-doped fiber amplifiers are pumped in-band with a 1908 nm Tm-doped fiber laser and operate at 1993 nm with >90% slope efficiency. In a core-pumped configuration, we have achieved 92.1% slope efficiency and 88.4% optical efficiency at 41 W output power. In a cladding-pumped configuration, we have achieved 123.1 W of output power with 90.4% optical efficiency and a 91.6% slope efficiency. We believe these are the highest optical efficiencies achieved in a Tm-doped fiber amplifier operating in the 2-micron spectral region.
Daniel
D
Creeden
Benjamin R
BR
Johnson
Glen A
GA
Rines
Scott D
SD
Setzler
D000669:Amplifiers, Electronic; D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State