{"id":6471,"date":"2026-06-05T11:40:21","date_gmt":"2026-06-05T09:40:21","guid":{"rendered":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=6471"},"modified":"2026-06-05T14:52:37","modified_gmt":"2026-06-05T12:52:37","slug":"tea-co2-laser-nouvelle-structure-batio3","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/tea-co2-laser-nouvelle-structure-batio3\/","title":{"rendered":"Laser CO2 picoseconde TEMA (Transversely Excited Multiple Atmosphere)"},"content":{"rendered":"
<\/div><\/div><\/div><\/div>\n
<\/div><\/div><\/div><\/div>\n

<\/div><\/div><\/div>
\n

Double ligne de \u00ab\u00a0Blumlein\u00a0\u00bb en titanate de barium\/ Dur\u00e9e de pulse 50- 200ns.<\/h4>\n<\/div><\/section><\/p><\/div>\n

<\/div><\/div><\/div>
\n

TEMA (Transversely Excited Multiple Atmosphere)<\/strong><\/h4>\n

G\u00e9n\u00e9rateur de MARX 3 \u00e9tages \u00ab\u00a0Blumlein\u00a0\u00bb BaTiO3 servant \u00e0 excit\u00e9 en THT le gaz entre les \u00e9lectrodes 8a et 9a. La pression dans la cavit\u00e9 est de 5 bars ce qui permet de cr\u00e9e des pulses picosecondes par couplage des modes longitudinaux.<\/h4>\n

La largeur spectrale n\u00e9cessaire aux impulsions picoseconde est obtenue par :<\/h4>\n
    \n
  • \n

    \u00e9largissement collisionnel \u00e0 haute pression,<\/h4>\n<\/li>\n
  • \n

    \u00e9largissement Stark (field broadening),<\/h4>\n<\/li>\n
  • \n

    amplification simultan\u00e9e de plusieurs transitions rotationnelles<\/h4>\n<\/li>\n
  • \n

    \u00e0 10 bars des pulses de 400 fs peuvent \u00eatre r\u00e9alis\u00e9s<\/strong><\/span><\/h4>\n<\/li>\n<\/ul>\n<\/div><\/section><\/p><\/div>\n
    <\/div><\/div><\/div><\/div>\n
    <\/div><\/div><\/div><\/div>\n
    <\/div><\/div><\/div><\/div>\n
    <\/div><\/div><\/div><\/div>\n

    <\/div><\/div><\/div>
    \n

    Double ligne de \u00ab\u00a0Blumlein\u00a0\u00bb en titanate de barium<\/h4>\n<\/div><\/section><\/p><\/div>\n

    1. Bande spectrale disponible<\/h3>\n

    Vous indiquez :<\/p>\n

      \n
    • \u03bbmin = 10,42 \u00b5m<\/li>\n
    • \u03bbmax = 10,82 \u00b5m<\/li>\n<\/ul>\n

      Largeur spectrale :<\/p>\n

      \u0394\u03bb=10.82\u221210.42=0.40 \u03bcm<\/span><\/span><\/span><\/p>\n

      La fr\u00e9quence optique vaut :<\/p>\n

      \u03bd<\/span>=<\/span><\/span>\u03bb<\/span>c<\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      c<\/span>=<\/span><\/span>3<\/span>\u00d7<\/span><\/span>1<\/span>08<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> m\/s.<\/p>\n

      Fr\u00e9quence \u00e0 10,42 \u00b5m :<\/p>\n

      \u03bd<\/span>ma<\/span>x<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>10.42\u00d7<\/span>10\u22126<\/span><\/span><\/span><\/span>3\u00d7<\/span>108<\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>2.879<\/span>\u00d7<\/span><\/span>1<\/span>013<\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u00a0<\/span>Hz<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      Fr\u00e9quence \u00e0 10,82 \u00b5m :<\/p>\n

      \u03bd<\/span>min<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>10.82\u00d7<\/span>10\u22126<\/span><\/span><\/span><\/span>3\u00d7<\/span>108<\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>2.773<\/span>\u00d7<\/span><\/span>1<\/span>013<\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u00a0<\/span>Hz<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      Donc :<\/p>\n

      \u0394<\/span>\u03bd<\/span>=<\/span><\/span>\u03bd<\/span>ma<\/span>x<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u2212<\/span><\/span>\u03bd<\/span>min<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u2248<\/span><\/span>1.06<\/span>\u00d7<\/span><\/span>1<\/span>012<\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u00a0<\/span>Hz<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      soit :<\/p>\n

      \u0394<\/span>\u03bd<\/span>\u2248<\/span><\/span>1.06<\/span>\u00a0<\/span>THz<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      2. Dur\u00e9e minimale transform\u00e9e de Fourier<\/h3>\n

      Pour une impulsion gaussienne :<\/p>\n

      \u0394<\/span>\u03bd<\/span>\u0394<\/span>t<\/span>=<\/span><\/span>0.44<\/span><\/span><\/span><\/span><\/span><\/p>\n

      d’o\u00f9 :<\/p>\n

      \u0394t=0.441.06\u00d71012\u00a0 \u00a0<\/span>\u0394<\/span>t<\/span>=<\/span><\/span>1.06\u00d7<\/span>1012<\/span><\/span><\/span><\/span>0.44<\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> \u0394t\u22484.15\u00d710\u221213 s\u00a0 <\/span><\/span><\/span>\u0394t<\/span>\u2248<\/span>415\u00a0<\/span>fs<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      3. Cas id\u00e9al (profil sech\u00b2)<\/h3>\n

      Pour un verrouillage de modes parfait<\/p>\n

      \u00a0t = 0.315<\/span>\u0394<\/span>\u03bd<\/span>\u0394<\/span>t<\/span>=<\/span><\/span>0.315<\/span><\/span><\/span><\/span><\/span> \u0394t=0.3151.06\u00d71012\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/span><\/span>\u0394t<\/span>\u2248<\/span>300\u00a0<\/span>fs<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      R\u00e9sultat<\/h3>\n

      Avec un gain couvrant contin\u00fbment 10,42 \u00e0 10,82 \u00b5m<\/strong>, la dur\u00e9e minimale th\u00e9orique est :<\/p>\n

      300\u00a0<\/span>a <\/span><\/span><\/span>420\u00a0<\/span>fs<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      suivant la forme temporelle de l’impulsion<\/p>\n<\/div><\/section><\/div>

      <\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":6474,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-6471","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lasers-a-gaz"],"_links":{"self":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/6471","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/comments?post=6471"}],"version-history":[{"count":15,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/6471\/revisions"}],"predecessor-version":[{"id":6499,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/6471\/revisions\/6499"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/media\/6474"}],"wp:attachment":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/media?parent=6471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/categories?post=6471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/tags?post=6471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}