报道了输出功率为瓦级，调谐范围超过100 nm 的中红外2.8 μm 波段光纤激光器。采用中心波长为975 nm 半导体激光器抽运高掺铒氟化物(Er:ZBLAN)双包层光纤，以闪耀光栅为调谐元件，室温下实现了功率大于1 W、宽范围可调谐的2.8 μm 波段光纤激光输出，最大调谐范围达122 nm。激光器在波长2.831 μm 处输出功率为1.02 W，斜率效率为21.6%。

A watt-level 100-nm tunable 2.8 μm-band mid-infrared fiber laser is demonstrated. By employing a blazing grating as the feedback, output power exceeding 1 W, tuning range of higher than 100 nm from heavi ly Er3+-doped ZBLAN double-clad fiber pumped by a laser-diode centered at 975 nm is obtained in continuous wave regime. Output power at 2.831 μm of the fiber laser is 1.02 W corresponding to the slope efficiency as high as 21.6%.