Fundamental investigations of ps-laser burst-mode on common metals for an enhanced ablation process

Nicolai Hänel; M. Stolze; T. Herrmann; J. A. Lhuillier

doi:10.1117/12.2079652

12 March 2015 Fundamental investigations of ps-laser burst-mode on common metals for an enhanced ablation process

Nicolai Hänel, M. Stolze, T. Herrmann, J. A. Lhuillier

Proceedings Volume 9351, Laser-based Micro- and Nanoprocessing IX; 93510E (2015) https://doi.org/10.1117/12.2079652
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

In this study, ps-laser micromachining of different types of metals like copper, aluminum, titanium, tungsten and zinc have been investigated. Their single-pulse damage thresholds for the laser wavelengths of 355 nm, 532 nm and 1064 nm were experimentally determined. The laser-induced surface morphology both in the low and high fluence regime, as well as in the transition area, were examined for all investigated metals by scanning electron microscopy. Single pulse experiments and multi-pulse ablation experiments for up to 6 pulses using time-delays between successive pulses of 1 s and 20 ns were carried out. Our observations show that the surface morphologies significantly change from single-pulse ablation to the application of a second pulse. By comparing different separation times in the multi-pulse experiments we show that the burst-mode in ps-laser processing accumulates heat. This results in strong arising melting films, smoothing of the ablation craters and melt splashes outside of the crater. We found out, that copper and aluminum as well as titanium and zinc show similar ablation behavior by using the burst mode.

Citation Download Citation

Nicolai Hänel, M. Stolze, T. Herrmann, and J. A. Lhuillier "Fundamental investigations of ps-laser burst-mode on common metals for an enhanced ablation process", Proc. SPIE 9351, Laser-based Micro- and Nanoprocessing IX, 93510E (12 March 2015); https://doi.org/10.1117/12.2079652

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available