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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 30 — Oct. 20, 2005
  • pp: 6338–6344

Investigation of laser percussion hole drilling by use of speckle correlation

O. Yalukova, N. Miroshnikova, P. Gren, I. Sárady, and M. Sjödahl  »View Author Affiliations


Applied Optics, Vol. 44, Issue 30, pp. 6338-6344 (2005)
http://dx.doi.org/10.1364/AO.44.006338


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Abstract

In this paper speckle correlation is introduced as a tool to investigate the heat-influenced area during material processing with laser light. Two materials were investigated, a pure silver sheet and a sheet of SiC–diamond composite. The processing laser used in the experiments was a diode-pumped acousto-optical Q-switched Nd:YAG laser that allowed percussion hole drilling to be performed using green light through a second-harmonic crystal. The measurements were performed using a continuous-wave He–Ne laser and a digital camera. The experimental results show that the heat-influenced area is ~5000 times larger than the actual hole being drilled and that it reaches a steady-state condition toward the end of the processing cycle.

© 2005 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry
(350.3390) Other areas of optics : Laser materials processing

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: July 7, 2004
Revised Manuscript: January 12, 2005
Manuscript Accepted: February 16, 2005
Published: October 20, 2005

Citation
O. Yalukova, N. Miroshnikova, P. Gren, I. Sárady, and M. Sjödahl, "Investigation of laser percussion hole drilling by use of speckle correlation," Appl. Opt. 44, 6338-6344 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-30-6338

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