用光偏转技术研究铜的激光烧蚀阈值

Study on the Laser Ablation Threshold of Copper Using Laser Beam Deflection Technique

用基于光偏转原理的三种方法(它们分别利用光声信号的能量、渡越时间及光偏转信号正峰峰值与入射激光能量密度的关系)测量了Cu的烧蚀阈值,并对这三种方法进行了比较。

Based on the principle of probe beam deflection, three methods have been used to measure the ablation threshold of Cu. The laser ablation threshold of the solid is determined according to the variation of the energy and transit time of photoacoustic signal and the relation of the positive amplitude deflection signals to the laser fluence. A comparison of these methods is made and the conditions for their applications are given.