Next Article in Journal / Special Issue
Droplet-Assisted Laser Direct Nanoscale Writing on Silicon
Previous Article in Journal
Terahertz and Cultural Heritage Science: Examination of Art and Archaeology
Article Menu

Export Article

Open AccessArticle
Technologies 2016, 4(1), 7; doi:10.3390/technologies4010007

Drilling of Copper Using a Dual-Pulse Femtosecond Laser

1
Department of Mechanical Engineering, National Chiao Tung University, No. 1001, Ta Hsueh Road, Hsinchu 30010, Taiwan
2
Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Chia-Lung Kuo, Jin-Chen Hsu, Chao-Ching Ho and Yuan-Jen Chang
Received: 23 December 2015 / Revised: 4 February 2016 / Accepted: 19 February 2016 / Published: 23 February 2016
(This article belongs to the Special Issue Laser Percussion Drilling Technology)
View Full-Text   |   Download PDF [2057 KB, uploaded 23 February 2016]   |  

Abstract

The drilling of copper using a dual-pulse femtosecond laser with wavelength of 800 nm, pulse duration of 120 fs and a variable pulse separation time (0.1–150 ps) is investigated theoretically. A one-dimensional two-temperature model with temperature-dependent material properties is considered, including dynamic optical properties and the thermal-physical properties. Rapid phase change and phase explosion models are incorporated to simulate the material ablation process. Numerical results show that under the same total laser fluence of 4 J/cm2, a dual-pulse femtosecond laser with a pulse separation time of 30–150 ps can increase the ablation depth, compared to the single pulse. The optimum pulse separation time is 85 ps. It is also demonstrated that a dual pulse with a suitable pulse separation time for different laser fluences can enhance the ablation rate by about 1.6 times. View Full-Text
Keywords: femtosecond laser; dual pulse; two-temperature model femtosecond laser; dual pulse; two-temperature model
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Cheng, C.-W.; Chen, J.-K. Drilling of Copper Using a Dual-Pulse Femtosecond Laser. Technologies 2016, 4, 7.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Technologies EISSN 2227-7080 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top