瓦级100nm可调谐中红外Er∶ZBLAN光纤激光器

Watt-Level 100 nm Tunable Mid-Infrared Er∶ZBLAN Fiber Laser

报道了输出功率为瓦级,调谐范围超过100 nm的中红外2.8 mm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 mm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 mm处输出功率为1.02 W,斜率效率为21.6%。

A watt-level 100 nm tunable 2.8 mm-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 heavily 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 mm of the fiber laser is 1.02 W corresponding to the slope efficiency as high as 21.6%.