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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S1 — Jan. 13, 2014
  • pp: A90–A98

Breakdown plasma and vortex flow control for laser ignition using a combination of nano- and femto-second lasers

Hirokazu Kojima, Eiichi Takahashi, and Hirohide Furutani  »View Author Affiliations

Optics Express, Vol. 22, Issue S1, pp. A90-A98 (2014)

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The breakdown plasma and successive flow leading to combustion are controlled by the combination of a nano-second Nd:YAG laser and a femto-second Ti:Sapphire (TiS) laser. The behaviors are captured by an intensified charged coupled device (ICCD) camera and a high-speed schlieren optical system. The TiS laser determines the initial position of the breakdown by supplying the initial electrons in the optical axis of focusing YAG laser pulses. We show that the initial position of the breakdown can be controlled by the incident position of the TiS laser. In addition, the ignition lean limit of the flammable mixture changes depending on the TiS laser incident position, which is influenced by hot gas distribution and the flow in the flame kernel.

© 2013 Optical Society of America

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.6500) Spectroscopy : Spectroscopy, time-resolved

ToC Category:
Laser Ignition

Original Manuscript: October 8, 2013
Revised Manuscript: November 25, 2013
Manuscript Accepted: November 25, 2013
Published: December 9, 2013

Hirokazu Kojima, Eiichi Takahashi, and Hirohide Furutani, "Breakdown plasma and vortex flow control for laser ignition using a combination of nano- and femto-second lasers," Opt. Express 22, A90-A98 (2014)

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