Partially Overlapped Dual Laser Beams to Reduce Ablation Craters  

作　　者：Meng-Han Wang Jun-Le Qu Ming Zhu 王梦涵;屈军乐;祝铭(Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Optoelectronic Engineering,Shenzhen University,Shenzhen 518060;Shenzhen Yuanqing Environmental Technology Service Co.,Ltd,Shenzhen 518071;Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518000)

机构地区：[1]Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Optoelectronic Engineering,Shenzhen University,Shenzhen 518060 [2]Shenzhen Yuanqing Environmental Technology Service Co.,Ltd,Shenzhen 518071 [3]Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518000

出　　处：《Chinese Physics Letters》2020年第1期29-33,共5页中国物理快报（英文版）

基　　金：the National Natural Science Foundation of China under Grant Nos 61525503 and 41603059;the National Key Research and Development Project of China under Grant No 2016YFC14000701;the Shenzhen Basic Research Project(JCY20160428092445411).

摘　　要：We present our experimental ablation results for partially overlapped dual nanosecond laser beams(PO-DB)on metal and glass surfaces.Numerical simulations are performed to evaluate the crater reduction potential of the PO-DB setup.Damage probability experiments proved the collaboration of two beams within the overlap region.Bright-field and three-dimensional profile measurements verify the reduced ablation area from the proposed PODB scheme.Laser-induced plasma is generated when transparent glass is ablated.Atomic emission of Na I(~589.95nm)shows comparable signal between the PO-DB set and the traditional single laser beam set.The proposed PO-DB ablation mechanism could also be applied to femtosecond laser systems.

关 键 词：DUAL TRANSPARENT OVERLAP 

分 类 号：O657.3[理学—分析化学]