提出了一种基于光纤重叠光栅的双波长光子晶体光纤激光器。激光器采用线形腔结构,掺铒光子晶体光纤为激光器的增益介质,反射率均高于99%的光纤重叠光栅用作激光器的波长选择器件。基于增益均衡技术,抑制谐振腔内的模式竞争,在室温下获得了稳定的双波长激光同时输出。实验结果表明:其3 dB线宽小于0.02 nm,30 dB线宽小于0.25 nm,SMSR为54.34 dB,双波长激光的中心波长间隔为0.932 nm。该双波长激光器输出的双波长激光具有较好的稳定性。 A dual-wavelength photonic crystal fiber laser based on fiber overlapped grating is proposed. The laser adopts the linear cavity structure, and the erbium-doped photonic crystal fiber is the gain medium of the laser, and the optical fiber overlapping grating whose reflectivity is higher than 99% is used as the wavelength selection device of the laser. Based on the gain equalization technique, the mode competition in the cavity is suppressed and a stable dual-wavelength laser output is obtained at room temperature. The experimental results show that the 3 dB linewidth is less than 0.02 nm, the 30 dB linewidth is less than 0.25 nm, the SMSR is 54.34 dB, and the center wavelength of dual wavelength laser is 0.932 nm. The dual-wavelength laser output of the dual-wavelength laser has better stability.