随着单管半导体激光器光纤耦合技术的不断发展, 为了进一步提高多单管半导体激光器的输出功率, 本文采用曲面空间排列方式对多个单管半导体激光器进行合束研究, 使更多数量的单管半导体激光器耦合进入同一光纤中, 获得更高的输出功率。文中利用ZEMAX光学设计软件进行仿真模拟, 将34只波长为975 nm、输出功率为10 W的单管半导体激光器合束聚焦后耦合进芯径200 μm、数值孔径0.22的光纤中, 获得耦合效率91.76%、输出功率312.03 W的激光系统。实验中, 将17只单管半导体激光器耦合进芯径200 μm、数值孔径0.22的光纤中, 在10.5 A的驱动电流下, 输出功率为100.5 W, 系统耦合效率为68.46%。

With the development of single emitter diode laser fiber coupling technology, in order to improve the output power of the multi-single emitters diode laser, the curved surface spatial combination, as a special way, was introduced to coupling the multi-single diode laser emitters into the fiber, which can combine the most number of single emitters in same optical fiber for increasing the output power. In simulation, with ZEMAX optical design software, 34 single emitters diode lasers with a center wavelength of 975 nm and 10 W output power are coupled into a fiber with core diameter of 200 μm and NA of 0.22. The simulation results of the maximum output power of 312.03 W and the coupling efficiency of 91.76% were obtained. We assembled a multiple single emitter diode laser based on 17 single emitters and coupled the beam into the optical fiber of which the core diameter is 200 μm and the numerical aperture is 0.22. Under 10.5 A driving current, the output power is 100.5 W and the coupling efficiency to be 68.46%.