【摘要】 大功率、高能量、窄脉冲激光与光纤之间的耦合对激光的应用有着重要的作用。但是 ,由于光纤端面具有一定的损伤阈值 ,利用透镜实现上述耦合是十分困难的。本文通过分析光纤端面的损伤机理 ,设计了一种伞形端头光源 -光纤耦合器 ,实现了大功率 (10MW ) ,高能量 (2 0mJ) ,窄脉冲 (2 0ns) ,高频电光调QNd∶YAG激光与光纤之间的耦合 ,耦合效率达到 80 %以上更多还原

【Abstract】 The coupling of a high-power, high-energy and narrow pulse laser unit with the optical fiber is important and of unique value in laser applications. Existence of the damage threshold in the fiber end face makes it very difficult to realize the coupling through lenses. In this paper was designed an umbrella shaped laser-fiber coupler by analyzing the mechanism of damage of an optical fiber and realized a coupling of a high-power (10MW), high-energy (20mJ), narrow pulse (20ns) and high frequency electrooptical Q-switched Nd∶YAG laser with a multimode optical fiber. The coupling efficiency is over 80%.更多还原