提出一种基于中阶梯光栅和数字微镜器件(DMD)的高分辨率C波段可调谐光纤激光器。利用DMD的灵活波长调谐性能和中阶梯光栅的高分辨率特性,在该激光器中设计了具有交叉色散结构的光路准直系统,实现了激光器高精度波长调谐功能。研究结果表明:通过在DMD上远程加载全息图,该激光器可实现1542~1558 nm波长范围内的灵活调谐,调谐精度为0.036 nm,输出信号的3 dB线宽小于0.02 nm,边模抑制比超过40 dB。在室温下,1 h内信号中心波长的漂移小于0.013 nm,功率涨落小于0.07 dB。

Herein, we propose a high-resolution C-band tunable fiber laser based on an echelle grating and a digital micromirror device (DMD). By employing the wavelength tuning performance of DMD and the high-resolution characteristics of an echelle grating, we design a cross-dispersion structure based optical alignment system, realizing the high-resolution wavelength tuning capability. Experimental results show that the laser demonstrates flexible tuning in 1542-1558-nm region by remotely loading holograms onto the DMD. The wavelength tuning resolution is approximately 0.036 nm, and the 3-dB linewidth of the output signal is less than 0.02 nm. The side-mode suppression ratio exceeds 40 dB, the center wavelength drift is less than 0.013 nm, and the power fluctuation is less than 0.07 dB within 1 h at room temperature.