{"id":9662,"date":"2026-08-02T22:32:10","date_gmt":"2026-08-02T20:32:10","guid":{"rendered":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=9662"},"modified":"2026-08-03T09:23:35","modified_gmt":"2026-08-03T07:23:35","slug":"flashlamp-pumped-ndyag-slab-laser","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/flashlamp-pumped-ndyag-slab-laser\/","title":{"rendered":"Flashlamp pumped Nd:YAG SLAB Laser"},"content":{"rendered":"

Le laser SLAB peut \u00eatre pomp\u00e9 par diode laser ou par tube \u00e0 \u00e9clair.
\nIci je vais construire un laser SLAB (dalle) avec une cavit\u00e9 ZIG-ZAG.
\nLe barreau provient d’une soci\u00e9t\u00e9 Chinoise qui l’a fabriqu\u00e9 pour un centre de recherche en Allemagne. Ce barreau est un Nd:YAG fritt\u00e9 car les dimensions de ce barreau ne peut pas \u00eatre r\u00e9alis\u00e9 par les m\u00e9thodes de tirage type Czochralski.<\/p>\n

C’est donc un laser \u00e0 4 niveaux donc avec un seuil laser relativement bas, ce qui n’est pas le cas avec un barreau de verre au N\u00e9odyme (laser \u00e0 3 niveaux)<\/p>\n

le grand int\u00e9r\u00eat du trajet en zig-zag : la lentille thermique est fortement r\u00e9duite et la qualit\u00e9 du faisceau est nettement meilleure qu’avec un gros barreau cylindrique. Ce principe, propos\u00e9 d\u00e8s les ann\u00e9es 1970, est devenu une r\u00e9f\u00e9rence pour les lasers de forte puissance.<\/p>\n<\/div><\/section><\/div>\n

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Le volume du barreau est de 58.5 cm3<\/sup>\u00a0ce qui permet de le pomp\u00e9 jusqu’\u00e0 37kJ (0.64kJ\/cm3<\/sup>) en 1ms la sortie en mode relax\u00e9 sera de 409 joules. Avec les 2 tubes flash XENON Corp. de 8kJ chacun je pense pouvoir sortir une \u00e9nergie de 190J\/pulse!<\/h3>\n<\/div><\/section>\n
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