基于像散与理想光源成像原理的高亮度半导体激光器光纤耦合设计方法

Design of High-brightness Fiber-coupled Diode Laser System Based on Astigmatism and Ideal Imaging Theories

运用像散原理和理想光源成像原理,讨论了半导体激光器消像散设计.提出了一种基于消像散的高亮度半导体激光器光纤耦合系统的设计方法.以波长为808nm,输出功率为10W的半导体激光器的光纤耦合为例,给出了详细的计算方法和设计步骤.结果表明:采用该方法将半导体激光器光束耦合入数值孔径为0.22,芯径为50μm的光纤中,耦合后输出功率为9.712W,耦合效率为97.12%,功率密度为1.1224×106 W/cm2.该方法不仅原理简单,而且设计的耦合系统耦合效率高、体积小,具有较强的实用价值.

A high-brightness fiber-coupled diode laser system is designed,based on the principle of astigmatism and ideal light source imaging theory.As an example,details of the calculation methods and design steps of the fiber coupled laser diode are given whose wavelength is 808 nm and output power is 10 W.Semiconductor laser beam can be coupled into the 50 μm core diameter optical fiber with a numerical aperture of 0.22.It is found that this fiber-coupled system has an output power of 9.712 W,a coupling efficiency of 97.12% and a power density of 1.1224×106 W/cm2.The proposed method is simple in principle,and the designed fiber-coupled system has high coupling efficiency,small size and strong practical value.