Dual waveband signals in high power laser welding were recorded and analyzed, especially, the law between the signals magnitude and the defocusing was discussed. 記錄和分析了高功率激光焊接中工作區的紫外和紅外信號，著重分析了雙波段信號與離焦量變化的對應規律。
There are various kinds of the self-oscillations in the preamplifier system of the high power laser facility, the origins of them were analyzed in theory. 摘要分析了高功率激光裝置預放大系統內外各種自激振蕩的來源，通過理論計算和實驗驗證提出了各種自激振蕩的抑制方法，並在實踐中得到驗證。
