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Journal of Optical Technology

Journal of Optical Technology

| SIMULTANEOUS RUSSIAN-ENGLISH PUBLICATION

  • Vol. 71, Iss. 6 — Jun. 1, 2004
  • pp: 338–347

Self-optical breakdown and multipulse optical breakdown of transparent insulators in the femto-nanosecond region of laser pulse widths

O. M. Efimov  »View Author Affiliations


Journal of Optical Technology, Vol. 71, Issue 6, pp. 338-347 (2004)
http://dx.doi.org/10.1364/JOT.71.000338


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Abstract

This review is devoted to an investigation of the nature of the optical breakdown of silicate glasses. Experiments have been carried out in a wide range of wavelengths, laser-radiation pulse widths, and focusing spot sizes. It is shown that the threshold power density for optical self-breakdown of borosilicate glass at a wavelength of about 1 µm is independent of the radiation pulse width in the range from 2×10^−13 to 3×10^−8 sec. This result cannot be explained in terms of existing theories. It indicates that the breakdown mechanism is associated with collective ionization of the insulator as a whole and not with the accumulation of electrons as a result of their individual ionization because of multiphoton, tunneling, or avalanche excitation. Special attention is paid to investigating electronic excitation processes in alkali- and lead-silicate glasses. © 2004 Optical Society of America

Citation
O. M. Efimov, "Self-optical breakdown and multipulse optical breakdown of transparent insulators in the femto-nanosecond region of laser pulse widths," J. Opt. Technol. 71, 338-347 (2004)
http://www.opticsinfobase.org/jot/abstract.cfm?URI=jot-71-6-338


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