Creeden Daniel, Johnson Benjamin R, Rines Glen A, Setzler Scott D
Opt Express. 2014 Nov 17;22(23):29067-80. doi: 10.1364/OE.22.029067.
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.
我们通过共振串联泵浦方法，在采用纤芯泵浦和包层泵浦配置的掺铥光纤中实现了超高效率放大。这些掺铥光纤放大器由1908 nm掺铥光纤激光器进行带内泵浦，并在1993 nm波长下工作，斜率效率大于90%。在纤芯泵浦配置中，我们在41 W输出功率下实现了92.1%的斜率效率和88.4%的光效率。在包层泵浦配置中，我们实现了123.1 W的输出功率，光效率为90.4%，斜率效率为91.6%。我们认为这些是在2微米光谱区域工作的掺铥光纤放大器中所实现的最高光效率。
