Article

Applied Physics A

, Volume 101, Issue 3, pp 487-490

First online:

Enhanced machining of steel using femtosecond pulse pairs

  • Carl M. LiebigAffiliated withSchool of Mechanical Engineering and Birck Nanotechnology Center, Purdue University
  • , P. SrisungsitthisuntiAffiliated withSchool of Mechanical Engineering and Birck Nanotechnology Center, Purdue University
  • , A. M. WeinerAffiliated withSchool of Electrical and Computer Engineering, Purdue University
  • , X. XuAffiliated withSchool of Mechanical Engineering and Birck Nanotechnology Center, Purdue University Email author 

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Abstract

In this study we report on the ablation of steel using femtosecond double-pulse trains. Double-pulse trains with pulse-to-pulse separations between 1 ps and 1 ns were used to machine micro-channels in a steel sample. The depths of the laser-ablated channels were measured to characterize the efficiency of the ablation process. Results show that using a double-pulse train with an optimal separation time dramatically increases the ablation depth and does not deposit unwanted material that may require additional post-processing of the machined surface.