[Revue sur les matériaux photoréfractifs : application à l'amélioration de la qualité spatiale de faisceau laser]
Les matériaux nonlinéaires photoréfractifs sont bien adaptés à l'enregistrement d'hologrammes de volume en exploitant le mélange d'ondes de faisceaux laser cohérents. Le mécanisme de changement d'indice est dû à un effet de charge d'espace qui module l'indice du cristal électro optique. Les mécanismes de base et interactions entre faisceaux sont présentés pour différent types de matériaux fonctionnant dans le visible et proche infrarouge. En particulier on décrit la possibilité d'amplifier un signal de faible intensité par transfert de l'intensité d'un faisceau pompe spatialement multimode. On applique cette interaction pour obtenir un faisceau de haute qualité spatiale à partir d'un laser à fibre à gros cœur multimode. Cette classe de matériaux nonlinéaires contribue à améliorer les performances des sources laser destinées aux applications de la photonique.
Nonlinear photorefractive materials are well suited to record dynamic volume holograms using the wave mixing of coherent laser beams. The photo-induced index modulation is due to a space charge field which modulates the crystal refractive index. The basic phenomena and beam interactions are reviewed for different types of materials operating in the visible and near infrared. In particular, we outline their ability to amplify a low intensity signal beam due to the intensity transfer of a spatially multimode pump beam. We apply this interaction to the cleanup of a multimode large core fiber amplifier. This class of nonlinear materials contribute to extending the performances of laser sources for advanced applications of photonics.
Mot clés : Matériaux photoréfractifs, Amélioration de faisceau laser
@article{CRPHYS_2007__8_2_234_0,
author = {Laurent Lombard and Arnaud Brignon and Jean-Pierre Huignard and \'Eric Lallier and Patrick Georges and Ga\"elle Lucas-Leclin and Gilles Pauliat and G\'erald Roosen},
title = {Review of photorefractive materials: an application to laser beam cleanup},
journal = {Comptes Rendus. Physique},
pages = {234--242},
publisher = {Elsevier},
volume = {8},
number = {2},
year = {2007},
doi = {10.1016/j.crhy.2006.07.016},
language = {en},
}
TY - JOUR AU - Laurent Lombard AU - Arnaud Brignon AU - Jean-Pierre Huignard AU - Éric Lallier AU - Patrick Georges AU - Gaëlle Lucas-Leclin AU - Gilles Pauliat AU - Gérald Roosen TI - Review of photorefractive materials: an application to laser beam cleanup JO - Comptes Rendus. Physique PY - 2007 SP - 234 EP - 242 VL - 8 IS - 2 PB - Elsevier DO - 10.1016/j.crhy.2006.07.016 LA - en ID - CRPHYS_2007__8_2_234_0 ER -
%0 Journal Article %A Laurent Lombard %A Arnaud Brignon %A Jean-Pierre Huignard %A Éric Lallier %A Patrick Georges %A Gaëlle Lucas-Leclin %A Gilles Pauliat %A Gérald Roosen %T Review of photorefractive materials: an application to laser beam cleanup %J Comptes Rendus. Physique %D 2007 %P 234-242 %V 8 %N 2 %I Elsevier %R 10.1016/j.crhy.2006.07.016 %G en %F CRPHYS_2007__8_2_234_0
Laurent Lombard; Arnaud Brignon; Jean-Pierre Huignard; Éric Lallier; Patrick Georges; Gaëlle Lucas-Leclin; Gilles Pauliat; Gérald Roosen. Review of photorefractive materials: an application to laser beam cleanup. Comptes Rendus. Physique, Volume 8 (2007) no. 2, pp. 234-242. doi : 10.1016/j.crhy.2006.07.016. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2006.07.016/
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