{"id":10421,"date":"2026-08-16T09:15:42","date_gmt":"2026-08-16T07:15:42","guid":{"rendered":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=10421"},"modified":"2026-08-16T09:57:57","modified_gmt":"2026-08-16T07:57:57","slug":"diode-pumped-ndyag-slab-laser","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/diode-pumped-ndyag-slab-laser\/","title":{"rendered":"Diode pumped Nd:YAG SLAB laser"},"content":{"rendered":"

Le laser \u00e0 slab (plaque)<\/strong> a \u00e9t\u00e9 d\u00e9velopp\u00e9 pr\u00e9cis\u00e9ment pour d\u00e9passer certaines limites thermiques des barreaux cylindriques Nd:YAG, surtout quand on monte fortement en puissance moyenne.<\/p>\n

Dans un barreau conventionnel, la chaleur est \u00e9vacu\u00e9e radialement. Cela cr\u00e9e un gradient de temp\u00e9rature radial qui produit une lentille thermique<\/strong>, de la bir\u00e9fringence induite et des contraintes m\u00e9caniques. Dans un slab, on cherche au contraire \u00e0 rendre le gradient thermique essentiellement unidimensionnel<\/strong>, \u00e0 travers la faible \u00e9paisseur de la plaque. Et avec la propagation en zigzag<\/strong>, le faisceau moyenne une grande partie des distorsions r\u00e9siduelles.<\/p>\n<\/div><\/section><\/div>\n

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Sur le sch\u00e9ma du 100-W-class zigzag slab amplifier<\/strong>, la partie centrale est du : 0<\/span>,<\/span>6%<\/span>N<\/span>d<\/span>:<\/span><\/span>Y<\/span>A<\/span>G <\/span><\/span><\/span><\/span><\/span><\/span>alors que les extr\u00e9mit\u00e9s sont en YAG non dop\u00e9<\/strong>.<\/p>\n

C’est une architecture composite.<\/p>\n

Le YAG non dop\u00e9 permet notamment de r\u00e9duire les probl\u00e8mes aux extr\u00e9mit\u00e9s de la zone amplificatrice et de faciliter la gestion des effets parasites. Le r\u00e9sultat pr\u00e9sent\u00e9 est remarquable :<\/p>\n

P<\/span>out<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>104<\/span>\u00a0<\/span>W\u00a0 <\/span><\/span><\/span><\/span><\/span><\/span><\/span>avec environ :\u00a0 \u00a090%<\/span>\u00a0<\/span>TE<\/span>M<\/span>00<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>.<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

La pente indiqu\u00e9e sur votre document est d’environ 15,1 %<\/strong>.<\/p>\n

C’est pr\u00e9cis\u00e9ment le genre de performance qui devient difficile \u00e0 obtenir avec un gros barreau Nd:YAG traditionnel sans compensation thermique sophistiqu\u00e9e.<\/p>\n<\/div><\/section><\/div>\n

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