报道了高功率、窄线宽、全光纤结构的2 μm波段掺铥连续光纤激光器。该掺铥连续光纤激光器采用了主振荡功率放大(MOPA)结构设计，通过采用790 nm的多模半导体激光器抽运双包层单模掺铥光纤，获得了稳定的中心波长为1963 nm的窄线宽、连续激光输出，最大输出功率为20 mW。利用该低功率连续激光作为种子源经过两级掺铥光纤放大器后，平均输出功率达到了22 W，相应的斜率效率为44%，激光中心波长为1963 nm，3 dB光谱线宽仅为0.24 nm。

A high-power narrow-bandwidth all-fiber thulium-doped silica fiber master oscillator power amplifier (MOPA) system that consists of a low power thulium-doped continuous wave fiber laser seed and two-stage thulium-doped double-clad fiber amplifiers pumped by fiber-pigtailed multimode diodes at 790 nm is reported. The center wavelength of the fiber laser is 1963 nm and the 3 dB bandwidth is 0.24 nm. The maximum output power is 22 W at a slope efficiency of 44% with respect to the launched pump power.