200W级高亮度半导体激光器光纤耦合模块

光纤激光器系统需要高可靠性、高亮度、高功率光纤耦合输出二极管激光器模块作为泵浦源。基于mini-bar二极管激光器芯片,采用光束精密准直技术、自由空间合束技术来获得高亮度、高功率光纤耦合输出,针对光纤芯径为200μm、数值孔径为0.22的多模光纤,开展了线偏振二极管激光光纤耦合实验,实验结果表明:光纤稳定输出功率达280 W,对应亮度为5.87 MW/(cm2·sr),电-光效率为45.0%。采用偏振合束技术,光纤预期输出功率可达500 W,对应亮度超过10 MW/(cm2·sr)。该方法可应用于研制数百瓦级高亮度二极管激光光纤耦合输出激光器模块。

High brightness fiber coupled diode laser module with 200 W class output power

Pumping fiber laser systems requires high brightness and high power fiber coupled diode laser module. In this paper, a method to get the high brightness and high power fiber coupled diode laser module is proposed, which is achieved by technologies of precision beam collimation and free space beam combining based on mini-bar diode laser chip. Experiment is carried out on linear polarization diode laser using the multimode fiber with 200 m core diameter and 0.22 numerical apertures. The laser output from fiber is 280 W, equalizing brightness of 5.87 MW/(cm2sr) and the wall plug efficiency is 45.0%. With polarization beam combining method, output power can reach 500 W and brightness will exceed 10 MW/(cm2sr). The experiment results show that this method can be used in developing high brightness fiber coupled diode laser module with multi-hundred watts class output power.