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Correction des phases spectrale et temporelle pour les lasers ultra-intenses.

Abstract : The production of ultra-short pulses and ultra-intense of great interest exploration of the physics of laser-matter interaction. Recent development years oscillator generating pulses shorter and shorter combined with technique of chirped amplification yielded powers of few hundred terawatt. The next generation of power line should produce pulses with a power order of tens of petawatts. Such channel could penetrate the Laser Integration Line (LIL) at CESTA in Bordeaux. The PW laser sizing study in the LIL has shown the need to correct the phases spectral and temporal. The objective of this thesis is the correction of the spectral phase using a modulator temporal phase for pulses of relatively low spectral width (a few nanometers) centered around 1.053 mu.m and temporally highly stretched. Specificity pulses required a particular work of adapting the methods of absolute measurement and spectral phase modulation. Controlling the spectral phase of pulses allows Indeed not only the correction of phase defects to compress the pulse frequency drift but also the temporal form of these pulses. Setting instead of the analogy between the temporal and spatial domains has given all the achievements of space to analyze the pulse spectral phase. We also formal correspondence of the phase modulation between the time domain and the spectral range for highly stretched pulses, using Theorem phase stationary. We present in this manuscript, the experimental results of measurements of spectral phase and spectral phase correction. An extension to the correction of the temporal phase is proposed: the correction effects Nonlinear directly in the time domain (using the phase modulator time). We present results of numerical simulations of the correction time phase to improve performance by a factor of three power LIL facility of the type.
Mots-clés : Phases spectrale Laser
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Submitted on : Friday, July 23, 2010 - 10:18:56 AM
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  • HAL Id : pastel-00003373, version 1


Estelle Salmon. Correction des phases spectrale et temporelle pour les lasers ultra-intenses.. Optique [physics.optics]. Ecole Polytechnique X, 2000. Français. ⟨pastel-00003373⟩



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