国产化掺铥光纤激光振荡器性能研究

The optical fibers and devices used in thulium-doped fiber lasers(TDFL) are mostly produced by foreign companies. Therefore, it is necessary to develop TDFL based on homemade materials and devices. In this paper, the performance of continuous-wave thulium-doped fiber oscillators using a homemade gain fiber is reported. During the experiment, using a domestic thulium-doped fiber with a core diameter of 10 μm, homemade LD(laser diode) pump sources and fiber gratings, three oscillators were developed to generate laser output with central wavelengths of 1 918 nm, 1 941 nm and 2 013 nm, respectively. In addition, the laser output characteristics of the homemade and imported thulium-doped gain fibers were compared. The experimental results indicate that the output efficiency of the homemade thulium-doped fiber(TDF) is 6-11% lower than the imported TDF, but the homemade TDF has a similar spectral linewidth(about 0.1 nm) and a better near-field spot.