Albert, Olivier (1998) Femtosecond nonlinear index variations: direct and cascaded effects. PhD thesis Optique et Photonique, Laboratoire d'Optique Appliquée (ENSTA - LOA), ENSTA.
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 theorical 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 intantaneous process for second harmonic or sum frequency generations. The associated chirp is therefore nonlinear.
| Item Type: | PhD Thesis (PhD) |
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| Thesis Supervisor: | Etchepare, Jean |
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| Date: | June 1998 |
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| Board of examiners: | Bouchareine, Patrick and Freysz, Eric and Hache, François and Maillotte, Hervé |
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| Ecole Doctorale: | ED 288 ONDES ET MATIERE |
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| Discipline: | Optique et Photonique |
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| Collection (Fonds): | ENSTA |
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| Institution: | ENSTA |
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| Department: | Laboratoire d'Optique Appliquée (ENSTA - LOA) |
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| Subjects: | 3. Physics, Optics |
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| Uncontrolled Keywords: | Optique non linéaire, Amplification paramétrique optique, lentille de Kerr, Spectroscopie impulsionnelle, Phonon, Polarition, Vecteur d'onde, Non linéarités en cascade |
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