{"id":6396,"date":"2026-06-04T19:03:07","date_gmt":"2026-06-04T17:03:07","guid":{"rendered":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=6396"},"modified":"2026-06-04T20:45:17","modified_gmt":"2026-06-04T18:45:17","slug":"laser-tea-n2-oscillateur-3-amplificteurs-limite-de-diffraction","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/laser-tea-n2-oscillateur-3-amplificteurs-limite-de-diffraction\/","title":{"rendered":"Laser TEA N2  oscillateur + 3 amplificteurs limite de diffraction"},"content":{"rendered":"<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-0  el_before_av_one_full  avia-builder-el-first  \" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-1  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6398 avia-img-lazy-loading-not-6398 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a1.png\" alt='' title='a1' height=\"659\" width=\"1092\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a1.png 1092w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a1-300x181.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a1-1030x622.png 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a1-768x463.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a1-705x425.png 705w\" sizes=\"(max-width: 1092px) 100vw, 1092px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-2  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><h3><i><b>Laser \u00e0 azote limite de diffraction<br \/>\nmuni d&rsquo;un oscillateur et de 3 amplificateurs.<\/b><\/i><\/h3>\n<p>Ce laser est une version MOPALITE avec 3 \u00e9tages d&rsquo;amplification qui devrais me permettre d&rsquo;obtenir un faisceau limite de diffraction d&rsquo;un m\u00e9gawatt durant 500 ps de quoi obtenir le claquage di\u00e9lectrique de l&rsquo;air (une premi\u00e8re mondial pour un laser \u00e0 azote! )<\/p>\n<p>Ce laser est une version plus puissante des lasers MOPALITE que j&rsquo;ai d\u00e9velopp\u00e9 en 1983 pour le CERN \u00e0 Gen\u00e8ve pour Carlo Rubbia prix Nobel avec la d\u00e9couverte du boson interm\u00e9diaire W\u00b0\u00a0 voir sous:<a class=\"\" href=\"https:\/\/www.swissrocketman.fr\/020-tea-n2-osc-2-ampli-mopa1000%2cfr%2c3%2c119.html\" target=\"_self\" rel=\"noopener\">\u00a0http:\/\/www.swissrocketman.fr\/020-tea-n2-osc-2-ampli-mopa1000,fr,3,119.cfm<\/a><\/p>\n<\/div><\/section><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-4  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-video avia-video-16-9   av-lazyload-immediate  av-lazyload-video-embed  ' style='background-image:url(\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a13.png\");'  itemprop=\"video\" itemtype=\"https:\/\/schema.org\/VideoObject\"  data-original_url='https:\/\/youtu.be\/aNGlVkB4DG0?si=uL41valMlgdCOgW_' ><script type='text\/html' class='av-video-tmpl'><div class='avia-iframe-wrap'><iframe loading=\"lazy\" title=\"TEA N2 4 stages laser\" width=\"1500\" height=\"844\" src=\"https:\/\/www.youtube.com\/embed\/aNGlVkB4DG0?feature=oembed&autoplay=0&loop=0&controls=1&mute=0\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div><\/script><div class='av-click-to-play-overlay'><div class=\"avia_playpause_icon\"><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-6  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-7  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6401 avia-img-lazy-loading-not-6401 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a2.png\" alt='' title='a2' height=\"665\" width=\"1013\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a2.png 1013w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a2-300x197.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a2-768x504.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a2-705x463.png 705w\" sizes=\"(max-width: 1013px) 100vw, 1013px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-8  el_after_av_one_full  el_before_av_one_half  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-9  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6414 avia-img-lazy-loading-not-6414 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a6.png\" alt='' title='a6' height=\"600\" width=\"1318\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a6.png 1318w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a6-300x137.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a6-1030x469.png 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a6-768x350.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a6-705x321.png 705w\" sizes=\"(max-width: 1318px) 100vw, 1318px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_half  flex_column_div av-zero-column-padding first  avia-builder-el-10  el_after_av_one_full  el_before_av_one_half  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-11  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6403 avia-img-lazy-loading-not-6403 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a3.png\" alt='' title='a3' height=\"628\" width=\"788\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a3.png 788w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a3-300x239.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a3-768x612.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a3-705x562.png 705w\" sizes=\"(max-width: 788px) 100vw, 788px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_half  flex_column_div av-zero-column-padding   avia-builder-el-12  el_after_av_one_half  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-13  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6404 avia-img-lazy-loading-not-6404 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a10.png\" alt='' title='a10' height=\"658\" width=\"1085\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a10.png 1085w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a10-300x182.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a10-1030x625.png 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a10-768x466.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a10-705x428.png 705w\" sizes=\"(max-width: 1085px) 100vw, 1085px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-14  el_after_av_one_half  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>Le laser se compose d&rsquo;une ligne de \u00ab\u00a0Blumlein\u00a0\u00bb ce qui permet de r\u00e9aliser plus facilement les r\u00e9glage des \u00e9lectrodes de d\u00e9charge et de pouvoir filmer la d\u00e9charge.<br \/>\nApr\u00e8s r\u00e9glage le laser sera \u00e9quip\u00e9 d&rsquo;une 2\u00e8me ligne de \u00ab\u00a0Blumlein\u00a0\u00bb ce qui permettra d&rsquo;augmenter l&rsquo;\u00e9nergie de sortie.<\/h4>\n<h4>L&rsquo;oscillateur produit un faisceau qui est s\u00e9lectionn\u00e9 en divergence au moyen d&rsquo;un iris de diam\u00e8tre 800 microns puis le rayon passe \u00e0 travers un t\u00e9lescope de 6X permettant d&rsquo;obtenir une divergence limite de diffraction gr\u00e2ce \u00e0 des \u00e9lectrodes d&rsquo;amplification ayant une forme bien particuli\u00e8re permettant de cr\u00e9er une zone de d\u00e9charge petite ayant un fort gain.<\/h4>\n<h4>Le faisceau sortant du t\u00e9lescope est limite de diffraction et \u00e0 une \u00e9nergie de l&rsquo;ordre de 1 microjoule et il va \u00eatre amplifier dans les 3 amplificateurs.<\/h4>\n<h4>La premi\u00e8re difficult\u00e9 consiste \u00e0 synchronis\u00e9 le timing du pulse entrant dans le premier amplificateur sachant que la dur\u00e9e du pulse est de 300 picoseconde et que le premier amplificateur dois \u00eatre pr\u00e8s de l&rsquo;inversion de population maximum sans que celui-ci parte en ASE (Amplified Spontaneous Emission)<\/h4>\n<h4>La deuxi\u00e8me difficult\u00e9 est d&rsquo;inject\u00e9 le faisceau pr\u00e9sentant une \u00e9nergie de 150 microjoules dans le deuxi\u00e8me et troisi\u00e8me amplificateur aussi en \u00e9tat maximum d&rsquo;inversion de population sans que ceux-ci partent en \u00e9mission ASE (pr\u00e9sentant une tr\u00e8s forte divergence)\u00a0 sachant que l&rsquo;onde \u00e9lectrique dans le di\u00e9lectrique (Epoxy bord) se propage 2.5 fois moins vite que la vitesse de la lumi\u00e8re! Toutes les photos sont avec 1 ligne de Blumlein alors pour visualiser la d\u00e9charge et v\u00e9rifier sont homog\u00e9n\u00e9it\u00e9. Le laser op\u00e9rationnel fonctionne avec 2 lignes de Blumlein.<\/h4>\n<\/div><\/section><\/div><div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-16  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-17  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6406 avia-img-lazy-loading-not-6406 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a5.png\" alt='' title='a5' height=\"651\" width=\"1090\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a5.png 1090w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a5-300x179.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a5-1030x615.png 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a5-768x459.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a5-705x421.png 705w\" sizes=\"(max-width: 1090px) 100vw, 1090px\" \/><\/div><\/div><\/div><\/div><\/p>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-18  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-19  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6407 avia-img-lazy-loading-not-6407 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a7.png\" alt='' title='a7' height=\"340\" width=\"1383\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a7.png 1383w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a7-300x74.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a7-1030x253.png 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a7-768x189.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a7-705x173.png 705w\" sizes=\"(max-width: 1383px) 100vw, 1383px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-20  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-21  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-6409 avia-img-lazy-loading-not-6409 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a12.png\" alt='' title='a12' height=\"670\" width=\"1132\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a12.png 1132w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a12-300x178.png 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a12-1030x610.png 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a12-768x455.png 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2026\/06\/a12-705x417.png 705w\" sizes=\"(max-width: 1132px) 100vw, 1132px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-22  el_after_av_one_full  avia-builder-el-last  column-top-margin\" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><p data-start=\"576\" data-end=\"655\">C&rsquo;est exactement une architecture <strong data-start=\"610\" data-end=\"618\">MO3PA<\/strong> (Master Oscillator 3 Power Amplifier).<\/p>\n<p data-start=\"657\" data-end=\"674\">Le principe est :<\/p>\n<ol data-start=\"676\" data-end=\"993\">\n<li data-section-id=\"1ucnv2b\" data-start=\"676\" data-end=\"730\">L&rsquo;oscillateur produit une impulsion UV tr\u00e8s propre.<\/li>\n<li data-section-id=\"1beoncs\" data-start=\"731\" data-end=\"783\">Le t\u00e9lescope adapte le diam\u00e8tre et la divergence.<\/li>\n<li data-section-id=\"14bf3md\" data-start=\"784\" data-end=\"888\">Les trois amplificateurs augmentent l&rsquo;\u00e9nergie sans d\u00e9grader excessivement la qualit\u00e9 du front d&rsquo;onde.<\/li>\n<li data-section-id=\"kdep13\" data-start=\"889\" data-end=\"993\">Le faisceau de sortie reste proche de la limite de diffraction.<\/li>\n<\/ol>\n<hr data-start=\"995\" data-end=\"998\" \/>\n<h2 data-section-id=\"s1o4cr\" data-start=\"1000\" data-end=\"1039\">Pourquoi utiliser 3 amplificateurs ?<\/h2>\n<p data-start=\"1041\" data-end=\"1077\">Le laser N\u2082 poss\u00e8de un gain \u00e9norme :<\/p>\n<ul data-start=\"1079\" data-end=\"1333\">\n<li data-section-id=\"1kk4f6e\" data-start=\"1079\" data-end=\"1148\">typiquement un facteur 2 tous les quelques centim\u00e8tres de d\u00e9charge,<\/li>\n<li data-section-id=\"1ws1zy4\" data-start=\"1149\" data-end=\"1227\">dur\u00e9e de vie de l&rsquo;\u00e9tat laser de seulement 1 \u00e0 2 ns \u00e0 pression atmosph\u00e9rique,<\/li>\n<li data-section-id=\"1ojcj5x\" data-start=\"1228\" data-end=\"1333\">largeur d&rsquo;impulsion souvent comprise entre 500 ps et quelques ns.<\/li>\n<\/ul>\n<p data-start=\"1335\" data-end=\"1417\">Le probl\u00e8me est que l&rsquo;\u00e9mission spontan\u00e9e amplifi\u00e9e (ASE) appara\u00eet tr\u00e8s rapidement.<\/p>\n<p data-start=\"1419\" data-end=\"1443\">L&rsquo;id\u00e9e consiste donc \u00e0 :<\/p>\n<ul data-start=\"1445\" data-end=\"1647\">\n<li data-section-id=\"1pqx849\" data-start=\"1445\" data-end=\"1486\">produire un petit faisceau tr\u00e8s propre,<\/li>\n<li data-section-id=\"1rxbid4\" data-start=\"1487\" data-end=\"1579\">l&rsquo;injecter dans des amplificateurs synchronis\u00e9s \u00e0 quelques centaines de picosecondes pr\u00e8s,<\/li>\n<li data-section-id=\"6jt9lk\" data-start=\"1580\" data-end=\"1647\">emp\u00eacher les amplificateurs de partir en super-radiance autonome.<\/li>\n<\/ul>\n<p data-start=\"1649\" data-end=\"1713\">C&rsquo;est exactement ce qui semble \u00eatre recherch\u00e9 sur votre montage.<\/p>\n<h2 data-section-id=\"n6sbvo\" data-start=\"1720\" data-end=\"1768\">Concernant le terme \u00ab limite de diffraction \u00bb<\/h2>\n<p data-start=\"1770\" data-end=\"1818\">C&rsquo;est probablement le point le plus int\u00e9ressant.<\/p>\n<p data-start=\"1820\" data-end=\"1862\">La plupart des TEA N\u2082 artisanaux donnent :<\/p>\n<ul data-start=\"1864\" data-end=\"1924\">\n<li data-section-id=\"c5wa8a\" data-start=\"1864\" data-end=\"1892\">2 \u00e0 10 mrad de divergence,<\/li>\n<li data-section-id=\"1sshwek\" data-start=\"1893\" data-end=\"1924\">un faisceau assez irr\u00e9gulier.<\/li>\n<\/ul>\n<p data-start=\"1926\" data-end=\"1984\">Un syst\u00e8me oscillateur + amplificateurs peut descendre \u00e0 :<\/p>\n<ul data-start=\"1986\" data-end=\"2061\">\n<li data-section-id=\"p5kmtw\" data-start=\"1986\" data-end=\"2015\">quelques centaines de \u00b5rad,<\/li>\n<li data-section-id=\"1vbm4gb\" data-start=\"2016\" data-end=\"2061\">parfois proche de la divergence th\u00e9orique :<\/li>\n<\/ul>\n<p><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">\u03b8\u22481.22\u03bbD\\theta \\approx \\frac{1.22 \\lambda}{D}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03b8<\/span><span class=\"mrel\">\u2248<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"mord mathnormal\">D<\/span>1.22<span class=\"mord mathnormal\">\u03bb<\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p data-start=\"2108\" data-end=\"2144\">Pour 337 nm et un faisceau de 5 mm :<\/p>\n<p data-start=\"2146\" data-end=\"2183\"><span class=\"inline-block align-middle\"><span class=\"katex\"><span class=\"katex-mathml\">\u03b8=1.22\u03bbD\\theta=\\frac{1.22\\lambda}{D}<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03b8<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">D<\/span><\/span><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">1.22<span class=\"mord mathnormal mtight\">\u03bb<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p data-start=\"2185\" data-end=\"2205\">on obtient environ :<\/p>\n<ul data-start=\"2207\" data-end=\"2253\">\n<li data-section-id=\"1th8dq3\" data-start=\"2207\" data-end=\"2253\">80 \u00b5rad de divergence limite de diffraction.<\/li>\n<\/ul>\n<p data-start=\"2255\" data-end=\"2293\">C&rsquo;\u00e9tait exceptionnel pour un laser N\u2082.<\/p>\n<h2 data-section-id=\"15xc7vk\" data-start=\"2300\" data-end=\"2353\">Le probl\u00e8me de synchronisation que vous mentionnez<\/h2>\n<p data-start=\"2355\" data-end=\"2409\">Votre commentaire attire imm\u00e9diatement mon attention :<\/p>\n<blockquote data-start=\"2411\" data-end=\"2511\">\n<p data-start=\"2413\" data-end=\"2511\">\u00ab la synchronisation n&rsquo;est pas obtenue car l&rsquo;imp\u00e9dance de la ligne de \u00ab\u00a0Blumlein\u00a0\u00bb n&rsquo;est pas adapt\u00e9e \u00bb<\/p>\n<\/blockquote>\n<p data-start=\"2513\" data-end=\"2534\">C&rsquo;est tr\u00e8s plausible.<\/p>\n<p data-start=\"2536\" data-end=\"2580\">Dans un syst\u00e8me \u00e0 plusieurs amplificateurs :<\/p>\n<ul data-start=\"2582\" data-end=\"2668\">\n<li data-section-id=\"cvmyfm\" data-start=\"2582\" data-end=\"2628\">quelques centaines de ps d&rsquo;erreur suffisent,<\/li>\n<li data-section-id=\"9vqa1e\" data-start=\"2629\" data-end=\"2668\">1 ns d&rsquo;erreur devient catastrophique.<\/li>\n<\/ul>\n<p data-start=\"2670\" data-end=\"2714\">Or le d\u00e9lai d&rsquo;une ligne de \u00ab\u00a0Blumlein\u00a0\u00bb d\u00e9pend :<\/p>\n<ul data-start=\"2716\" data-end=\"2886\">\n<li data-section-id=\"5ouexo\" data-start=\"2716\" data-end=\"2751\">de son imp\u00e9dance caract\u00e9ristique,<\/li>\n<li data-section-id=\"1gd1iei\" data-start=\"2752\" data-end=\"2769\">de sa longueur,<\/li>\n<li data-section-id=\"4cukoc\" data-start=\"2770\" data-end=\"2801\">de sa constante di\u00e9lectrique,<\/li>\n<li data-section-id=\"1rq5zkh\" data-start=\"2802\" data-end=\"2843\">des capacit\u00e9s parasites des \u00e9lectrodes,<\/li>\n<li data-section-id=\"x7vm0k\" data-start=\"2844\" data-end=\"2886\">du comportement dynamique de l&rsquo;\u00e9clateur.<\/li>\n<\/ul>\n<p data-start=\"2888\" data-end=\"2922\">Une mauvaise adaptation provoque :<\/p>\n<ul data-start=\"2924\" data-end=\"3026\">\n<li data-section-id=\"1qkjbw3\" data-start=\"2924\" data-end=\"2937\">r\u00e9flexions,<\/li>\n<li data-section-id=\"rif6o7\" data-start=\"2938\" data-end=\"2957\">double impulsion,<\/li>\n<li data-section-id=\"v4ikdk\" data-start=\"2958\" data-end=\"2976\">jitter temporel,<\/li>\n<li data-section-id=\"2znvgj\" data-start=\"2977\" data-end=\"3026\">d\u00e9clenchement non simultan\u00e9 des amplificateurs.<\/li>\n<\/ul>\n<p data-start=\"3028\" data-end=\"3088\">L&rsquo;\u00e9nergie reste alors faible malgr\u00e9 un gain th\u00e9orique \u00e9lev\u00e9.<\/p>\n<h2 data-section-id=\"19m337p\" data-start=\"3249\" data-end=\"3285\">Cela me rappelle quelque chose&#8230;<\/h2>\n<p data-start=\"3287\" data-end=\"3386\">En effectuant une recherche, je suis tomb\u00e9 sur une discussion extr\u00eamement proche de votre montage :<\/p>\n<ul data-start=\"3388\" data-end=\"3539\">\n<li data-section-id=\"1sziu61\" data-start=\"3388\" data-end=\"3409\">oscillateur TEA N\u2082,<\/li>\n<li data-section-id=\"ftqd0m\" data-start=\"3410\" data-end=\"3433\">trois amplificateurs,<\/li>\n<li data-section-id=\"18z472z\" data-start=\"3434\" data-end=\"3466\">objectif d&rsquo;environ 1 MW cr\u00eate,<\/li>\n<li data-section-id=\"69b4tm\" data-start=\"3467\" data-end=\"3539\">faisceau limit\u00e9 par diffraction.<\/li>\n<\/ul>\n<p data-start=\"3541\" data-end=\"3633\">Je ne sais pas si c&rsquo;est votre syst\u00e8me ou non, mais la description est \u00e9tonnamment similaire.<\/p>\n<\/div><\/section><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":6411,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-6396","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\/6396","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=6396"}],"version-history":[{"count":14,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/6396\/revisions"}],"predecessor-version":[{"id":6419,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/6396\/revisions\/6419"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/media\/6411"}],"wp:attachment":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/media?parent=6396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/categories?post=6396"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/tags?post=6396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}