中文摘要：

为研究条形波导激光器泵浦光的耦合效率，建立了耦合效率和泵浦实验间的直观联系。通过几何光学法追迹泵浦光线在波导中的传播，系统地分析了泵浦光束与波导相对位置变化对泵浦耦合效率的影响，进而确定最佳耦合条件。最后，通过实验验证了计算与分析的正确性。

英文摘要：

The relationship between the launching efficiency and the pumping experimental setup has been studied to investigate the launching efficiency of graded-index channel waveguide. By the ray tracing in the channel waveguide, the dependency of the launching efficiency on the relative position of the pumping beam to the waveguide is analyzed and the coupling conditions are optimized. At last, it is proved that our calculation and analysis are reasonable and correct by the results of the experiments.