Partially Overlapped Dual Laser Beams to Reduce Ablation Craters

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（1）
• 页码范围: 29-33
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/1/015202

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 (～589.95 nm) 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.