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Variations d'indice non linéaire en régime femtoseconde : effets directs et effets en cascade

Abstract : This manuscript presents nonlinear optic applications to frequency generation and temporal measurement of nonlinear phase processes. It deals with:

- a femtosecond parametric amplification setup that enable to extend experimental wavelength to the near infrared.

- a linear phase shift measurement system for time resolved pump--probe experiments.

- optical phonon frequency measurement in perovskites crystals, including theoretical and experimental determination of the associated wave vector.

- temporal measurement of the phase shift induced by cascaded second order nonlinearities. We show that it behaves like a non instantaneous process for second harmonic or sum frequency generations.
The associated chirp is therefore nonlinear.
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https://pastel.archives-ouvertes.fr/tel-00011667
Contributor : Olivier Albert <>
Submitted on : Wednesday, February 22, 2006 - 2:41:56 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:02 AM
Long-term archiving on: : Saturday, April 3, 2010 - 10:32:53 PM

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  • HAL Id : tel-00011667, version 1

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Olivier Albert. Variations d'indice non linéaire en régime femtoseconde : effets directs et effets en cascade. Physique Atomique [physics.atom-ph]. ENSTA ParisTech, 1998. Français. ⟨tel-00011667⟩

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