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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1995),
  • paper CTuI18

Characteristic times of thermal nonlinear refractive effects

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Abstract

Thermal defocusing effects in organic liquids containing dyes have been shown to be of interest for optical-limiting applications with nanosecond pulses,1 whereas in the picosecond regime they are not efficient. These thermal effects are due to a change in the refractive index, which can be a few orders of magnitude larger than that of CS2 in which a reorientational Kerr-like effect is induced, Nevertheless, when the build-up time of this nonlinearity is close to the pulse duration, the defocusing effect is significantly reduced (transient regime).

© 1995 Optical Society of America

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