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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 26921–26928

Modulation of laser induced-cracks inside a LiF single crystal by fs laser irradiation at multiple points

Masaaki Sakakura, Yuki Ishiguro, Naoaki Fukuda, Yasuhiko Shimotsuma, and Kiyotaka Miura  »View Author Affiliations

Optics Express, Vol. 21, Issue 22, pp. 26921-26928 (2013)

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Crack formations inside a LiF single crystal after femtosecond laser irradiation at multiple points were investigated. In the case of sequential laser irradiation at three points, the propagations of some cracks were prevented by the dislocation bands generated by the previous laser irradiation. On the other hand, in the case of simultaneous laser irradiation at three points with a spatial light modulator, cracks in all the <100> directions from the photoexcited regions were generated clearly, but the length of one crack depended on the distribution of laser irradiation positions. The simulation of elastic dynamics after fs laser irradiation at three points elucidated that the interference of laser induced stress waves depended on the distributions of the irradiation positions. We found that the constructive interference of stress waves at a crack tip should have prevented the crack from propagating further and the tensile stress by destructive interference of stress waves along a crack should have facilitated the propagation of the crack.

© 2013 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.3220) Materials : Ionic crystals
(320.5390) Ultrafast optics : Picosecond phenomena
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 13, 2013
Revised Manuscript: October 18, 2013
Manuscript Accepted: October 18, 2013
Published: October 30, 2013

Virtual Issues
November 15, 2013 Spotlight on Optics

Masaaki Sakakura, Yuki Ishiguro, Naoaki Fukuda, Yasuhiko Shimotsuma, and Kiyotaka Miura, "Modulation of laser induced-cracks inside a LiF single crystal by fs laser irradiation at multiple points," Opt. Express 21, 26921-26928 (2013)

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