Femtosecond and picosecond laser drilling of metals at high repetition rates and average powers
Optics Letters, Vol. 34, Issue 21, pp. 3304-3306 (2009)
http://dx.doi.org/10.1364/OL.34.003304
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Abstract
The influence of pulse duration on the laser drilling of metals at repetition rates of up to 1 MHz and average powers of up to 70 W has been experimentally investigated using an ytterbium-doped-fiber chirped-pulse amplification system with pulses from 800 fs to 19 ps. At a few hundred kilohertz particle shielding causes an increase in the number of pulses for breakthrough, depending on the pulse energy and duration. At higher repetition rates, the heat accumulation effect overbalances particle shielding, but significant melt ejection affects the hole quality. Using femtosecond pulses, heat accumulation starts at higher repetition rates, and the ablation efficiency is higher compared with picosecond pulses.
© 2009 Optical Society of America
OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
ToC Category:
Ultrafast Optics
History
Original Manuscript: July 6, 2009
Revised Manuscript: August 31, 2009
Manuscript Accepted: September 4, 2009
Published: October 23, 2009
Citation
A. Ancona, S. Döring, C. Jauregui, F. Röser, J. Limpert, S. Nolte, and A. Tünnermann, "Femtosecond and picosecond laser drilling of metals at high repetition rates and average powers," Opt. Lett. 34, 3304-3306 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-21-3304
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