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(zhù)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(lái)源，通過(guò)理論計算和實(shí)驗驗證提出了各種自激振蕩的抑制方法，并在實(shí)踐中得到驗證。
