提出一种基于双芯光纤滤波器和非线性偏振旋转效应（NPR）的多波长掺铒光纤激光器。使用双芯光纤构成紧凑型全光纤马赫曾德尔(Mach-Zehnder)干涉仪型滤波器作为波长选择滤波器件，利用激光谐振腔中的非线性偏振旋转效应，通过调整光纤偏振控制器(PC)，在室温下得到稳定的多波长激光输出。输出激光的工作波长左右漂移小于0.02 nm，输出峰值功率波动小于0.4 dB，具有良好的功率和波长稳定性。

Multi-wavelength erbium-doped fiber laser based on twin-core fiber filter and nonlinear polarization rotation at room temperature is proposed. The compact in-fiber Mach-Zehnder comb-filter is formed by splicing a section of twin-core fiber (TCF) with two single mode fibers (SMFs). Due to the nonlinear polarization rotation (NPR) effect in the laser cavity, the laser can be made to operate in stable multi-wavelength lasing states by adjusting the states of the polarization controller (PC) appropriately. The wavelength shift is less than 0.02 nm, and the power amplitude variation is less than 0.4 dB, which shows the fiber laser has a good stability.