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Proceedings Paper

Three-dimensional footprint of optical breakdown in transparent dielectrics induced by femtosecond pulsed lasers and the effect of laser energy absorption
Author(s): M. H. Mahdieh; Z. Mortezaei
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Paper Abstract

In this paper optical breakdown process in dielectrics induced by femtosecond pulsed lasers was calculated numerically and 3-dimensional footprint of the breakdown region was simulated. Rate equation was used to calculate the temporal and spatial evolution of free electron density. In these simulations the role of tunneling ionization in free electron generation has been considered. Also absorbed energy from the pulse via multiphoton and inverse bremsstrahlung absorption was calculated numerically. The results show that the absorption of the propagating laser through the initially transparent dielectric is important and its ignorance may results in significant error in estimating the breakdown geometry, and volume. According to the simulation results in compare with our previous calculations, smaller and asymmetrical breakdown footprint is obtained if the absorption is considered in the calculations.

Paper Details

Date Published: 3 February 2015
PDF: 14 pages
Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92554I (3 February 2015); doi: 10.1117/12.2065664
Show Author Affiliations
M. H. Mahdieh, Iran Univ. of Science and Technology (Iran, Islamic Republic of)
Z. Mortezaei, Iran Univ. of Science and Technology (Iran, Islamic Republic of)


Published in SPIE Proceedings Vol. 9255:
XX International Symposium on High-Power Laser Systems and Applications 2014
Chun Tang; Shu Chen; Xiaolin Tang, Editor(s)

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