采用光束整形的方法, 研制出高效率单阵列光纤耦合半导体激光模块。将波长为976 nm连续工作的标准半导体激光阵列, 经过快轴准直, 阶梯镜组进行快慢轴光束旋转, 慢轴准直, 以及耦合透镜聚焦, 耦合入芯径300 μm, 数值孔径0.22的光纤。测量结果显示: 光纤的出光功率最大可达到63 W, 对应的亮度为1.2 MW/cm2·sr, 光纤耦合效率大于90%。上述结果为进一步实现多个阵列的耦合, 研制数百瓦量级的高效率半导体激光器光纤耦合模块奠定了基础。

We had made the high coupling-efficiency fiber coupled diode laser module by beam shaping. The wavelength of the CW diode laser bar is 976 nm, and the bar has been collimated by fast axis collimation lens. Then the beam is transformed by micro-step mirrors, collimated by slow axis collimation optics, and focused into a multimode fiber (300 μm core diameter, NA＝0.22). Experiment results showed that the laser output from fiber could reach to 63 W, the brightness is 1.2 MW/cm2·sr, the coupling-efficiency is more than 90%.Experiment results demonstrated that this module laid a foundation to couple multiple bars into fiber and develop the high coupling efficiency diode laser module with CW hundreds watts class output power.