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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 24 — Nov. 22, 2010
  • pp: 24495–24503

Pulse duration dependent nonlinear propagation of a focused femtosecond laser pulse in fused silica

Quan Sun, Hidenori Asahi, Yoshiaki Nishijima, Naoki Murazawa, Kosei Ueno, and Hiroaki Misawa  »View Author Affiliations


Optics Express, Vol. 18, Issue 24, pp. 24495-24503 (2010)
http://dx.doi.org/10.1364/OE.18.024495


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Abstract

The nonlinear propagation of a single focused femtosecond laser pulse in fused silica has been investigated both experimentally and by numerical simulations. In particular, the filamentation behavior was systematically studied by varying pulse duration. At low pulse energy, the peak plasma density inside the filament first increases to a maximum value with increasing pulse duration and then begins to decrease. At relatively high pulse energy, denser plasma can be induced around the geometrical focus with a certain longer pulse duration, where the peak power is already below the self-focusing critical power and no filament is formed. This pulse duration dependent behavior can be explained by different ionization mechanisms.

© 2010 Optical Society of America

OCIS Codes
(140.3390) Lasers and laser optics : Laser materials processing
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors

ToC Category:
Ultrafast Optics

History
Original Manuscript: September 8, 2010
Revised Manuscript: October 28, 2010
Manuscript Accepted: October 29, 2010
Published: November 9, 2010

Citation
Quan Sun, Hidenori Asahi, Yoshiaki Nishijima, Naoki Murazawa, Kosei Ueno, and Hiroaki Misawa, "Pulse duration dependent nonlinear propagation of a focused femtosecond laser pulse in fused silica," Opt. Express 18, 24495-24503 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-24-24495


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