Welding depth measurement for different mode lasers using optical coherence tomography  

作　　者：谢冠明 王三宏 张跃强 李由 胡彪 傅愉 于起峰 Guanming Xie;Sanhong Wang;Yueqiang Zhang;You Li;Biao Hu;Yu Fu;Qifeng Yu(Institute of Intelligent Optical Measurement and Detection,Shenzhen University,Shenzhen 518060,China;College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;Shenzhen Sincevision Technology Co.,Ltd.,Shenzhen 518055,China;National Key Laboratory of Human Factors Engineering,China Astronaut Research and Training Center,Beijing 100094,China;College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]Institute of Intelligent Optical Measurement and Detection,Shenzhen University,Shenzhen 518060,China [2]College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China [3]Shenzhen Sincevision Technology Co.,Ltd.,Shenzhen 518055,China [4]National Key Laboratory of Human Factors Engineering,China Astronaut Research and Training Center,Beijing 100094,China [5]College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Optics Letters》2024年第1期41-46,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.12002215);the China Postdoctoral Science Foundation(No.2022T150437);the National Key Research and Development Program of China(No.2019YFC1511102)。

摘　　要：Optical coherence tomography(OCT)allows a direct and precise measurement of laser welding depth by coaxially measuring the keyhole depth and can be used for process monitoring and control.When OCT measurement was taken during single-beam laser welding,the keyhole instability of aluminum welding resulted in highly scattered OCT data and complicated the welding depth extraction methods.As a combination of an inner core beam and an outer ring beam,a novel adjustable ring mode(ARM)laser for producing a stable keyhole was applied to the OCT measurement.Different ARM laser power arrangements were conducted on aluminum and copper.The results indicated that the ring beam greatly improved the stability of the core beam-induced keyhole,and smooth welding depth can be extracted from the concentrated OCT data.

关 键 词：optical coherence tomography adjustable ring mode laser laser welding welding depth 

分 类 号：TN248[电子电信—物理电子学] TG456.7[金属学及工艺—焊接]